MII IG Kerndatensatz-Modul Bildgebung
2027.0.0-ballot.1 - Germany

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 Imaging Modality CT

Official URL: https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct Version: 2027.0.0-ballot.1
Active as of 2026-09-15 Computable Name: MII_EX_Bildgebung_Modalitaet_CT

The extension allows to extend the resources and feasibility analysis to CT data.

Context of Use

The CT (computed tomography) extension enables the capture of relevant DICOM tags in order to draw conclusions about how the images were acquired. A characteristic of computed tomography is the use of X-rays to produce detailed cross-sectional images of the body. This information about radiation generation, radiation exposure and the technical parameters of the acquisition is available in the corresponding DICOM tags.

Relevant DICOM tags:

  • CTDIvol [(0018, 9345) CTDIVolume] in milligray [mGy]
  • X-ray tube voltage [(0018, 0060) KVP] in kilovolt [kV]
  • Exposure time [(0018, 1150) exposureTime] in milliseconds [ms]
  • Exposure [(0018, 1152) exposure] in milliampere-seconds [mAs]
  • X-ray tube current [(0018, 1151) xRayTubeCurrent] in milliampere [mA]
  • Convolution kernel [(0018,1210) convolutionalKernel]

Examples

Note: For clarity, this example does not include all of the associated series and instances. In a real implementation, all series and instances belonging to the study are of course expected to be present in the resulting FHIR resource — the "series" or "instance" sequence is simply repeated for every series or instance and filled with the corresponding values.

Example of an ImagingStudy resource with the extension for CT metadata, including the modality-independent extensions for contrast media, instance details and device manufacturer:

ImagingStudy-mii-exa-bildgebung-bildgebungsstudie-ct

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and their representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension MII EX Bildgebung Modalität CT
... Slices for extension Content/Rules for all slices
.... extension:CTDIvol 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "CTDIvol"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milligray
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: mGy
.... extension:KVP 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "KVP"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: kilovolt
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: kV
.... extension:exposureTime 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "exposureTime"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milliseconds
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: ms
.... extension:exposure 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "exposure"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milliampere second
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: mA.s
.... extension:xRayTubeCurrent 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "xRayTubeCurrent"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milliampere
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: mA
.... extension:convolutionalKernel 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "convolutionalKernel"
..... value[x] 0..1 string Value of extension
... url 1..1 uri "https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct"
... value[x] 0..0 Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension MII EX Bildgebung Modalität CT
... id 0..1 string Unique id for inter-element referencing
... Slices for extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... extension:CTDIvol 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "CTDIvol"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milligray
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: mGy
.... extension:KVP 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "KVP"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: kilovolt
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: kV
.... extension:exposureTime 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "exposureTime"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milliseconds
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: ms
.... extension:exposure 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "exposure"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milliampere second
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: mA.s
.... extension:xRayTubeCurrent 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "xRayTubeCurrent"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milliampere
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: mA
.... extension:convolutionalKernel 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "convolutionalKernel"
..... value[x] 0..1 string Value of extension
... url 1..1 uri "https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct"

doco Documentation for this format

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Complex Extension: Die Extension ermöglicht es die Ressourcen und Machbarkeitsanalysen auf CT Daten zu erweitern.

  • CTDIvol: Quantity: An Extension
  • KVP: Quantity: An Extension
  • exposureTime: Quantity: An Extension
  • exposure: Quantity: An Extension
  • xRayTubeCurrent: Quantity: An Extension
  • convolutionalKernel: string: An Extension

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension MII EX Bildgebung Modalität CT
... Slices for extension Content/Rules for all slices
.... extension:CTDIvol 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "CTDIvol"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milligray
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: mGy
.... extension:KVP 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "KVP"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: kilovolt
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: kV
.... extension:exposureTime 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "exposureTime"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milliseconds
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: ms
.... extension:exposure 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "exposure"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milliampere second
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: mA.s
.... extension:xRayTubeCurrent 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "xRayTubeCurrent"
..... value[x] 0..1 SimpleQuantity Value of extension
...... unit 0..1 string Unit representation
Required Pattern: milliampere
...... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code 0..1 code Coded form of the unit
Required Pattern: mA
.... extension:convolutionalKernel 0..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "convolutionalKernel"
..... value[x] 0..1 string Value of extension
... url 1..1 uri "https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct"
... value[x] 0..0 Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension MII EX Bildgebung Modalität CT
... id 0..1 string Unique id for inter-element referencing
... Slices for extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... extension:CTDIvol 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "CTDIvol"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milligray
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: mGy
.... extension:KVP 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "KVP"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: kilovolt
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: kV
.... extension:exposureTime 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "exposureTime"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milliseconds
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: ms
.... extension:exposure 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "exposure"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milliampere second
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: mA.s
.... extension:xRayTubeCurrent 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "xRayTubeCurrent"
..... value[x] 0..1 SimpleQuantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... unit Σ 0..1 string Unit representation
Required Pattern: milliampere
...... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
...... code Σ 0..1 code Coded form of the unit
Required Pattern: mA
.... extension:convolutionalKernel 0..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "convolutionalKernel"
..... value[x] 0..1 string Value of extension
... url 1..1 uri "https://www.medizininformatik-initiative.de/fhir/ext/modul-bildgebung/StructureDefinition/mii-ex-bildgebung-modalitaet-ct"

doco Documentation for this format

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Complex Extension: Die Extension ermöglicht es die Ressourcen und Machbarkeitsanalysen auf CT Daten zu erweitern.

  • CTDIvol: Quantity: An Extension
  • KVP: Quantity: An Extension
  • exposureTime: Quantity: An Extension
  • exposure: Quantity: An Extension
  • xRayTubeCurrent: Quantity: An Extension
  • convolutionalKernel: string: An Extension

 

Other representations of profile: CSV, Excel, Schematron