MII EX Bildgebung Modalität CT - MII IG Kerndatensatz-Modul Bildgebung v2027.0.0-ballot.1

This page is part of the MII Implementation Guide Bildgebung (v2027.0.0-ballot.1: Release) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version. For a full list of available versions, see the Directory of published versions

Extension: MII EX Bildgebung Modalität CT - Detaillierte Beschreibungen

Active Stand: 2026-09-15

Definitionen für das mii-ex-bildgebung-modalitaet-ct extension

Schlüsselelemente-Tabelle
Differential-Tabelle
Snapshot-Tabelle

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	Die Extension ermöglicht es die Ressourcen und Machbarkeitsanalysen auf CT Daten zu erweitern. Optional Extension Element - found in all resources.
Short	MII EX Bildgebung Modalität CTOptional Extensions Element
Control	0..* This element is affected by the following invariants: ele-1
Is Modifier	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
2. Extension.extension:CTDIvol
Slice Name	CTDIvol
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
4. Extension.extension:CTDIvol.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..0*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:CTDIvol.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`CTDIvol`
8. Extension.extension:CTDIvol.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
10. Extension.extension:CTDIvol.value[x].comparator
Definition	Not allowed to be used in this context How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Short	< \| <= \| >= \| > - how to understand the value
Control	0..01
Binding	The codes SHALL be taken from QuantityComparatorhttp://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1 (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
12. Extension.extension:CTDIvol.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milligray`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
14. Extension.extension:CTDIvol.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. Extension.extension:CTDIvol.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`mGy`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
18. Extension.extension:KVP
Slice Name	KVP
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
20. Extension.extension:KVP.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..0*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
22. Extension.extension:KVP.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`KVP`
24. Extension.extension:KVP.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
26. Extension.extension:KVP.value[x].comparator
Definition	Not allowed to be used in this context How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Short	< \| <= \| >= \| > - how to understand the value
Control	0..01
Binding	The codes SHALL be taken from QuantityComparatorhttp://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1 (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
28. Extension.extension:KVP.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`kilovolt`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
30. Extension.extension:KVP.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
32. Extension.extension:KVP.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`kV`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
34. Extension.extension:exposureTime
Slice Name	exposureTime
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
36. Extension.extension:exposureTime.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..0*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
38. Extension.extension:exposureTime.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`exposureTime`
40. Extension.extension:exposureTime.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
42. Extension.extension:exposureTime.value[x].comparator
Definition	Not allowed to be used in this context How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Short	< \| <= \| >= \| > - how to understand the value
Control	0..01
Binding	The codes SHALL be taken from QuantityComparatorhttp://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1 (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
44. Extension.extension:exposureTime.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milliseconds`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
46. Extension.extension:exposureTime.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
48. Extension.extension:exposureTime.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`ms`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
50. Extension.extension:exposure
Slice Name	exposure
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
52. Extension.extension:exposure.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..0*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
54. Extension.extension:exposure.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`exposure`
56. Extension.extension:exposure.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
58. Extension.extension:exposure.value[x].comparator
Definition	Not allowed to be used in this context How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Short	< \| <= \| >= \| > - how to understand the value
Control	0..01
Binding	The codes SHALL be taken from QuantityComparatorhttp://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1 (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
60. Extension.extension:exposure.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milliampere second`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
62. Extension.extension:exposure.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
64. Extension.extension:exposure.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`mA.s`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
66. Extension.extension:xRayTubeCurrent
Slice Name	xRayTubeCurrent
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
68. Extension.extension:xRayTubeCurrent.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..0*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
70. Extension.extension:xRayTubeCurrent.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`xRayTubeCurrent`
72. Extension.extension:xRayTubeCurrent.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
74. Extension.extension:xRayTubeCurrent.value[x].comparator
Definition	Not allowed to be used in this context How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Short	< \| <= \| >= \| > - how to understand the value
Control	0..01
Binding	The codes SHALL be taken from QuantityComparatorhttp://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1 (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
76. Extension.extension:xRayTubeCurrent.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milliampere`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
78. Extension.extension:xRayTubeCurrent.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
80. Extension.extension:xRayTubeCurrent.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`mA`
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
82. Extension.extension:convolutionalKernel
Slice Name	convolutionalKernel
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
84. Extension.extension:convolutionalKernel.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..0*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
86. Extension.extension:convolutionalKernel.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`convolutionalKernel`
88. Extension.extension:convolutionalKernel.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
90. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct`
92. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	Die Extension ermöglicht es die Ressourcen und Machbarkeitsanalysen auf CT Daten zu erweitern.
Short	MII EX Bildgebung Modalität CT
2. Extension.extension:CTDIvol
Slice Name	CTDIvol
Control	0..1
4. Extension.extension:CTDIvol.extension
Control	0..0
6. Extension.extension:CTDIvol.url
Fixed Value	`CTDIvol`
8. Extension.extension:CTDIvol.value[x]
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
10. Extension.extension:CTDIvol.value[x].unit
Pattern Value	`milligray`
12. Extension.extension:CTDIvol.value[x].system
Pattern Value	`http://unitsofmeasure.org`
14. Extension.extension:CTDIvol.value[x].code
Pattern Value	`mGy`
16. Extension.extension:KVP
Slice Name	KVP
Control	0..1
18. Extension.extension:KVP.extension
Control	0..0
20. Extension.extension:KVP.url
Fixed Value	`KVP`
22. Extension.extension:KVP.value[x]
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
24. Extension.extension:KVP.value[x].unit
Pattern Value	`kilovolt`
26. Extension.extension:KVP.value[x].system
Pattern Value	`http://unitsofmeasure.org`
28. Extension.extension:KVP.value[x].code
Pattern Value	`kV`
30. Extension.extension:exposureTime
Slice Name	exposureTime
Control	0..1
32. Extension.extension:exposureTime.extension
Control	0..0
34. Extension.extension:exposureTime.url
Fixed Value	`exposureTime`
36. Extension.extension:exposureTime.value[x]
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
38. Extension.extension:exposureTime.value[x].unit
Pattern Value	`milliseconds`
40. Extension.extension:exposureTime.value[x].system
Pattern Value	`http://unitsofmeasure.org`
42. Extension.extension:exposureTime.value[x].code
Pattern Value	`ms`
44. Extension.extension:exposure
Slice Name	exposure
Control	0..1
46. Extension.extension:exposure.extension
Control	0..0
48. Extension.extension:exposure.url
Fixed Value	`exposure`
50. Extension.extension:exposure.value[x]
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
52. Extension.extension:exposure.value[x].unit
Pattern Value	`milliampere second`
54. Extension.extension:exposure.value[x].system
Pattern Value	`http://unitsofmeasure.org`
56. Extension.extension:exposure.value[x].code
Pattern Value	`mA.s`
58. Extension.extension:xRayTubeCurrent
Slice Name	xRayTubeCurrent
Control	0..1
60. Extension.extension:xRayTubeCurrent.extension
Control	0..0
62. Extension.extension:xRayTubeCurrent.url
Fixed Value	`xRayTubeCurrent`
64. Extension.extension:xRayTubeCurrent.value[x]
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
66. Extension.extension:xRayTubeCurrent.value[x].unit
Pattern Value	`milliampere`
68. Extension.extension:xRayTubeCurrent.value[x].system
Pattern Value	`http://unitsofmeasure.org`
70. Extension.extension:xRayTubeCurrent.value[x].code
Pattern Value	`mA`
72. Extension.extension:convolutionalKernel
Slice Name	convolutionalKernel
Control	0..1
74. Extension.extension:convolutionalKernel.extension
Control	0..0
76. Extension.extension:convolutionalKernel.url
Fixed Value	`convolutionalKernel`
78. Extension.extension:convolutionalKernel.value[x]
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
80. Extension.url
Fixed Value	`https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct`
82. Extension.value[x]
Control	0..0

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	Die Extension ermöglicht es die Ressourcen und Machbarkeitsanalysen auf CT Daten zu erweitern.
Short	MII EX Bildgebung Modalität CT
Control	0..* This element is affected by the following invariants: ele-1
Is Modifier	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
2. Extension.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
4. Extension.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:CTDIvol
Slice Name	CTDIvol
Definition	An Extension
Short	Extension
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
8. Extension.extension:CTDIvol.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
10. Extension.extension:CTDIvol.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
12. Extension.extension:CTDIvol.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`CTDIvol`
14. Extension.extension:CTDIvol.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
16. Extension.extension:CTDIvol.value[x].id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
18. Extension.extension:CTDIvol.value[x].extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x].extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
20. Extension.extension:CTDIvol.value[x].value
Definition	The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Short	Numerical value (with implicit precision)
Comments	The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Control	0..1
Type	decimal
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Precision is handled implicitly in almost all cases of measurement.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
22. Extension.extension:CTDIvol.value[x].comparator
Definition	Not allowed to be used in this context
Short	< \| <= \| >= \| > - how to understand the value
Control	0..0
Binding	The codes SHALL be taken from QuantityComparator (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
24. Extension.extension:CTDIvol.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milligray`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
26. Extension.extension:CTDIvol.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
28. Extension.extension:CTDIvol.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`mGy`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
30. Extension.extension:KVP
Slice Name	KVP
Definition	An Extension
Short	Extension
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
32. Extension.extension:KVP.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
34. Extension.extension:KVP.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
36. Extension.extension:KVP.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`KVP`
38. Extension.extension:KVP.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
40. Extension.extension:KVP.value[x].id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
42. Extension.extension:KVP.value[x].extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x].extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
44. Extension.extension:KVP.value[x].value
Definition	The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Short	Numerical value (with implicit precision)
Comments	The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Control	0..1
Type	decimal
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Precision is handled implicitly in almost all cases of measurement.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
46. Extension.extension:KVP.value[x].comparator
Definition	Not allowed to be used in this context
Short	< \| <= \| >= \| > - how to understand the value
Control	0..0
Binding	The codes SHALL be taken from QuantityComparator (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
48. Extension.extension:KVP.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`kilovolt`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
50. Extension.extension:KVP.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
52. Extension.extension:KVP.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`kV`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
54. Extension.extension:exposureTime
Slice Name	exposureTime
Definition	An Extension
Short	Extension
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
56. Extension.extension:exposureTime.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
58. Extension.extension:exposureTime.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
60. Extension.extension:exposureTime.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`exposureTime`
62. Extension.extension:exposureTime.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
64. Extension.extension:exposureTime.value[x].id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
66. Extension.extension:exposureTime.value[x].extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x].extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
68. Extension.extension:exposureTime.value[x].value
Definition	The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Short	Numerical value (with implicit precision)
Comments	The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Control	0..1
Type	decimal
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Precision is handled implicitly in almost all cases of measurement.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
70. Extension.extension:exposureTime.value[x].comparator
Definition	Not allowed to be used in this context
Short	< \| <= \| >= \| > - how to understand the value
Control	0..0
Binding	The codes SHALL be taken from QuantityComparator (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
72. Extension.extension:exposureTime.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milliseconds`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
74. Extension.extension:exposureTime.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
76. Extension.extension:exposureTime.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`ms`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
78. Extension.extension:exposure
Slice Name	exposure
Definition	An Extension
Short	Extension
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
80. Extension.extension:exposure.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
82. Extension.extension:exposure.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
84. Extension.extension:exposure.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`exposure`
86. Extension.extension:exposure.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
88. Extension.extension:exposure.value[x].id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
90. Extension.extension:exposure.value[x].extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x].extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
92. Extension.extension:exposure.value[x].value
Definition	The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Short	Numerical value (with implicit precision)
Comments	The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Control	0..1
Type	decimal
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Precision is handled implicitly in almost all cases of measurement.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
94. Extension.extension:exposure.value[x].comparator
Definition	Not allowed to be used in this context
Short	< \| <= \| >= \| > - how to understand the value
Control	0..0
Binding	The codes SHALL be taken from QuantityComparator (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
96. Extension.extension:exposure.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milliampere second`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
98. Extension.extension:exposure.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
100. Extension.extension:exposure.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`mA.s`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
102. Extension.extension:xRayTubeCurrent
Slice Name	xRayTubeCurrent
Definition	An Extension
Short	Extension
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
104. Extension.extension:xRayTubeCurrent.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
106. Extension.extension:xRayTubeCurrent.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
108. Extension.extension:xRayTubeCurrent.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`xRayTubeCurrent`
110. Extension.extension:xRayTubeCurrent.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	Quantity(SimpleQuantity)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
112. Extension.extension:xRayTubeCurrent.value[x].id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
114. Extension.extension:xRayTubeCurrent.value[x].extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x].extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
116. Extension.extension:xRayTubeCurrent.value[x].value
Definition	The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Short	Numerical value (with implicit precision)
Comments	The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Control	0..1
Type	decimal
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Precision is handled implicitly in almost all cases of measurement.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
118. Extension.extension:xRayTubeCurrent.value[x].comparator
Definition	Not allowed to be used in this context
Short	< \| <= \| >= \| > - how to understand the value
Control	0..0
Binding	The codes SHALL be taken from QuantityComparator (required to `http://hl7.org/fhir/ValueSet/quantity-comparator\|4.0.1`) How the Quantity should be understood and represented.
Type	code
Is Modifier	true because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Meaning if Missing	If there is no comparator, then there is no modification of the value
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
120. Extension.extension:xRayTubeCurrent.value[x].unit
Definition	A human-readable form of the unit.
Short	Unit representation
Control	0..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Pattern Value	`milliampere`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
122. Extension.extension:xRayTubeCurrent.value[x].system
Definition	The identification of the system that provides the coded form of the unit.
Short	System that defines coded unit form
Control	0..1 This element is affected by the following invariants: qty-3
Type	uri
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to know the system that defines the coded form of the unit.
Pattern Value	`http://unitsofmeasure.org`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
124. Extension.extension:xRayTubeCurrent.value[x].code
Definition	A computer processable form of the unit in some unit representation system.
Short	Coded form of the unit
Comments	The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Control	0..1
Type	code
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Pattern Value	`mA`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
126. Extension.extension:convolutionalKernel
Slice Name	convolutionalKernel
Definition	An Extension
Short	Extension
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
128. Extension.extension:convolutionalKernel.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	string
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
130. Extension.extension:convolutionalKernel.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
132. Extension.extension:convolutionalKernel.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`convolutionalKernel`
134. Extension.extension:convolutionalKernel.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
136. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct`
138. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)