A.36 ENHANCED mr information object definitionS

A.36.1 Relationship between Enhanced MR IODs

Figure A.36-1 illustrates the relationships between the Enhanced MR IODs described in Section A.36.

Source Image Sequence (0008,2112), Referenced Image Sequence (0008,1140) and Referenced Raw Data Sequence (0008,9121) provide references between SOP Instances.

Note: Many attributes have names and descriptions that include the terms “pixel” and “image”. Although MR spectroscopy is not pixel based, some of these “pixel” and “image” attributes encode concepts that are still relevant for this technique. Where such attributes appear in the MR Spectroscopy IOD, it may be helpful to consider the term “pixel” to be equivalent to a spectroscopy “voxel”, and the term “image” to be equivalent to “MR Spectroscopy SOP Instance”.

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Figure A.36-1 Relationships between Enhanced MR IODs

A.36.2 Enhanced MR Image Information Object Definition

A.36.2.1 Enhanced MR Image IOD Description

The Enhanced Magnetic Resonance (MR) Image Information Object Definition (IOD) specifies an image, which has been created by a magnetic resonance device.

A.36.2.2 Enhanced MR Image Entity-Relationship Model

The E-R Model in section A.1.2 depicts those components of the DICOM Information Model, which directly reference the Enhanced MR Image IOD.

A.36.2.3 Enhanced MR Image IOD Module Table

Table A.36-1ENHANCED MR IMAGE IOD MODULES

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
MR Series C.8.13.6 M
Frame of Reference Frame of Reference C.7.4.1 M
Synchronization C.7.4.2 C- Required if time synchronization was applied.
Equipment General Equipment C.7.5.1 M
Enhanced General Equipment C.7.5.2 M
Image Image Pixel C.7.6.3 M
Enhanced Contrast/Bolus C.7.6.4b C - Required if contrast media were applied.
Multi-frame Functional Groups C.7.6.16 M
Multi-frame Dimension C.7.6.17 M
Cardiac Synchronization C.7.6.18.1 C - Required if cardiac synchronization was applied.
Respiratory Synchronization C.7.6.18.2 C - Required if respiratory synchronization was applied.
Bulk Motion Synchronization C.7.6.18.3 C - Required if bulk motion synchronization was applied.
Supplemental Palette Color Lookup Table C.7.6.19 C - Required if Pixel Presentation (0008,9205) in the Enhanced MR Image Module equals COLOR or MIXED.
Acquisition Context C.7.6.14 M
Device C.7.6.12 U
Specimen C.7.6.22 U
Enhanced MR Image C.8.13.1 M
MR Pulse Sequence C.8.13.4 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
ICC Profile C.11.15 U
SOP Common C.12.1 M
Frame Extraction C.12.3 C - Required if the SOP Instance was created in response to a Frame-Level retrieve request

A.36.2.3.1 Enhanced MR Image IOD Content Constraints

The General Image Module, Overlay Plane Module and VOI LUT Module shall not be used in a Standard Extended SOP Class of the Enhanced MR Image.

Notes: 1. In order to annotate images, whether during acquisition or subsequently, SOP Instances of the Grayscale Softcopy Presentation State Storage or the Structured Report Storage SOP Classes that reference the image SOP Instance, may be used.

No standard mechanism is provided for inclusion of annotations within the image SOP Instance itself, and implementers are discouraged from using private extensions to circumvent this restriction.

Grayscale Softcopy Presentation State Storage Instances that are generated during acquisition may be referenced from the Image SOP Instance by using the Referenced Grayscale Presentation State Sequence in the MR Image and Spectroscopy Instance Macro invoked from the Enhanced MR Image Module. See C.8.13.2.

2. The Curve Module was previously include in the list of Modules that shall not be present, but has been retired from DICOM. It is still not permitted to be present. See PS 3.3 2004.

3. The Specimen Identification Module was previously included in this IOD but has been retired, and its functionality replaced by the Specimen Module. See PS 3.3-2008.

The Photometric Interpretation (0028,0004) defined in C.8.13.1 Enhanced MR Image Module, shall be MONOCHROME2.

A.36.2.4 Enhanced MR Image Functional Group Macros

Table A.36-2 specifies the use of the Functional Group macros used in the Multi-frame Functional Groups Module for the Enhanced MR Image IOD.

Table A.36-2ENHANCED MR IMAGE FUNCTIONAL GROUP MACROS

Functional Group Macro Section Usage
Pixel Measures C.7.6.16.2.1 M
Frame Content C.7.6.16.2.2 M - May not be used as a Shared Functional Group.
Plane Position (Patient) C.7.6.16.2.3 M
Plane Orientation (Patient) C.7.6.16.2.4 M
Referenced Image C.7.6.16.2.5 C - Required if the image or frame has been planned on another image or frame. May be present otherwise
Derivation Image C.7.6.16.2.6 C - Required if the image or frame has been derived from another SOP Instance.
Cardiac Synchronization C.7.6.16.2.7 C - Required if Cardiac Synchronization Technique (0018,9037) equals other than NONE and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
Frame Anatomy C.7.6.16.2.8 M
Pixel Value Transformation C.7.6.16.2.9 C - Required if Photometric Interpretation (0028,0004) is MONOCHROME2.
Frame VOI LUT C.7.6.16.2.10 U - May be used only if Photometric Interpretation (0028,0004) is MONOCHROME2.
Real World Value Mapping C.7.6.16.2.11 U - May be used only if Photometric Interpretation (0028,0004) is MONOCHROME2.
Contrast/Bolus Usage C.7.6.16.2.12 C - Required if Contrast/Bolus Agent Sequence (0018,0012) is used.
Respiratory Synchronization C.7.6.16.2.17 C - Required if Respiratory Motion Compensation Technique (0018,9170) equals other than NONE, REALTIME or BREATH_HOLD and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Image Frame Type C.8.13.5.1 M
MR Timing and Related Parameters C.8.13.5.2 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR FOV/Geometry C.8.13.5.3 C - Required if Geometry of k-Space Traversal (0018,9032) equals RECTILINEAR and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Echo C.8.13.5.4 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Modifier C.8.13.5.5 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Imaging Modifier C.8.13.5.6 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Receive Coil C.8.13.5.7 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Transmit Coil C.8.13.5.8 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Diffusion C.8.13.5.9 C - Required if Acquisition Contrast (0008,9209) in any MR Image Frame Type Functional Group in the SOP Instance equals DIFFUSION and Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Averages C.8.13.5.10 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Spatial Saturation C.8.13.5.11 C - Required if Spatial Pre-saturation (0018,9027) equals SLAB for any frame in the SOP Instance and Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Metabolite Map C.8.13.5.12 C - Required if Image Type (0008,0008) Value 3 equals METABOLITE_MAP. May be present otherwise.
MR Velocity Encoding C.8.13.5.13 C - Required if Phase Contrast (0018,9014) equals YES and Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Arterial Spin Labeling C.8.13.5.14 C – Required if Image Type (0008,0008) Value 3 is ASL. May be present otherwise.

A.36.3 MR Spectroscopy Information Object Definition

A.36.3.1 MR Spectroscopy IOD Description

The Magnetic Resonance (MR) Spectroscopy Information Object Definition (IOD) specifies spectroscopic data, which has been created by a magnetic resonance device.

A.36.3.2 MR Spectroscopy entity-relationship model

The E-R Model in section A.1.2 depicts those components of the DICOM Information Model, which directly reference the MR Spectroscopy IOD.

A.36.3.3 MR Spectroscopy IOD Module Table

Table A.36-3MR SPECTROSCOPY IOD MODULES

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
MR Series C.8.13.6 M
Frame of Reference Frame of Reference C.7.4.1 M
Synchronization C.7.4.2 C- Required if time synchronization was applied.
Equipment General Equipment C.7.5.1 M
Enhanced General Equipment C.7.5.2 M
MR Spectroscopy Enhanced Contrast/Bolus C.7.6.4b C - Required if contrast media were applied.
Multi-frame Functional Groups C.7.6.16 M
Multi-frame Dimension C.7.6.17 M
Cardiac Synchronization C.7.6.18.1 C - Required if cardiac synchronization was applied.
Respiratory Synchronization C.7.6.18.2 C - Required if respiratory synchronization was applied.
Bulk Motion Synchronization C.7.6.18.3 C - Required if bulk motion synchronization was applied.
Acquisition Context C.7.6.14 M
Specimen C.7.6.22 U
MR Spectroscopy C.8.14.1 M
MR Spectroscopy Pulse Sequence C.8.14.2 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL. May be present otherwise.
MR Spectroscopy Data C.8.14.4 M
SOP Common C.12.1 M
Frame Extraction C.12.3 C - Required if the SOP Instance was created in response to a Frame-Level retrieve request

Note: The Specimen Identification Module was previously included in this IOD but has been retired, and its functionality replaced by the Specimen Module. See PS 3.3-2008.

A.36.3.4 MR Spectroscopy Functional Group Macros

Table A.36-4 specifies the use of the Functional Group macros used in the Multi-frame Functional Groups Module for the MR Spectroscopy IOD.

Table A.36-4MR SPECTROSCOPY FUNCTIONAL GROUP MACROS

Functional Group Macro Section Usage
Pixel Measures C.7.6.16.2.1 M
Frame Content C.7.6.16.2.2 M - May not be used as a Shared Functional Group
Plane Position (Patient) C.7.6.16.2.3 M
Plane Orientation (Patient) C.7.6.16.2.4 M
Referenced Image C.7.6.16.2.5 C - Required if the image or frame has been planned on another image or frame. May be present otherwise
Derivation Image C.7.6.16.2.6 C - Required if the image or frame has been derived from another SOP Instance.
Cardiac Synchronization C.7.6.16.2.7 C - Required if Cardiac Synchronization Technique (0018,9037) equals other than NONE and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
Frame Anatomy C.7.6.16.2.8 M
Contrast/Bolus Usage C.7.6.16.2.12 C - Required if Contrast/Bolus Agent Sequence (0018,0012) is used.
Respiratory Synchronization C.7.6.16.2.17 C - Required if Respiratory Motion Compensation Technique (0018,9170) equals other than NONE, REALTIME or BREATH_HOLD and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Spectroscopy Frame Type C.8.14.5.1 M
MR Timing and Related Parameters C.8.13.5.2 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Spectroscopy FOV/Geometry C.8.14.3.2 C - Required if Geometry of k-Space Traversal (0018,9032) equals RECTILINEAR and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Echo C.8.13.5.4 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Modifier C.8.13.5.5 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Receive Coil C.8.13.5.7 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Transmit Coil C.8.13.5.8 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Diffusion C.8.13.5.9 C - Required if Acquisition Contrast (0008,9209) in any MR Image Frame Type Functional Group in the SOP Instance equals DIFFUSION and Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Averages C.8.13.5.10 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Spatial Saturation C.8.13.5.11 C - Required if Spatial Pre-saturation (0018,9027) equals SLAB for any frame in the SOP Instance and Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
MR Velocity Encoding C.8.13.5.13 C - Required if Phase Contrast (0018,9014) equals YES and Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.

A.36.4 Enhanced MR Color Image Information Object Definition

A.36.4.1 Enhanced MR Color Image IOD Description

The Enhanced Magnetic Resonance (MR) Color Image Information Object Definition (IOD) specifies an image, which has been created by a magnetic resonance device.

A.36.4.2 Enhanced MR Color Image Entity-Relationship Model

The E-R Model in section A.1.2 depicts those components of the DICOM Information Model, which directly reference the Enhanced MR Color Image IOD.

A.36.4.3 Enhanced MR Color Image IOD Module Table

Table A.36-5ENHANCED MR COLOR IMAGE IOD MODULES

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
MR Series C.8.13.6 M
Frame of Reference Frame of Reference C.7.4.1 M
Synchronization C.7.4.2 C- Required if time synchronization was applied.
Equipment General Equipment C.7.5.1 M
Enhanced General Equipment C.7.5.2 M
Image Image Pixel C.7.6.3 M
Enhanced Contrast/Bolus C.7.6.4b C - Required if contrast media were applied.
Multi-frame Functional Groups C.7.6.16 M
Multi-frame Dimension C.7.6.17 M
Cardiac Synchronization C.7.6.18.1 C - Required if cardiac synchronization was applied.
Respiratory Synchronization C.7.6.18.2 C - Required if respiratory synchronization was applied.
Bulk Motion Synchronization C.7.6.18.3 C - Required if bulk motion synchronization was applied.
Acquisition Context C.7.6.14 M
Specimen C.7.6.22 C - Required if Imaging Subject is a specimen
Device C.7.6.12 U
Enhanced MR Image C.8.13.1 M
MR Pulse Sequence C.8.13.4 C - Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
ICC Profile C.11.15.1 M
SOP Common C.12.1 M
Frame Extraction C.12.3 C - Required if the SOP Instance was created in response to a Frame-Level retrieve request

A.36.4.3.1 Enhanced MR Color Image IOD Content Constraints

The General Image Module, Overlay Plane Module and VOI LUT Module shall not be used in a Standard Extended SOP Class of the Enhanced MR Color Image.

Note: In order to annotate images, whether during acquisition or subsequently, SOP Instances of the Color Softcopy Presentation State Storage or the Structured Report Storage SOP Classes that reference the image SOP Instance, may be used.

No standard mechanism is provided for inclusion of annotations within the image SOP Instance itself, and implementers are discouraged from using private extensions to circumvent this restriction.

Color Softcopy Presentation State Storage Instances that are generated during acquisition may be referenced from the Image SOP Instance by using the Referenced Presentation State Sequence in the MR Image and Spectroscopy Instance Macro invoked from the Enhanced MR Image Module. See C.8.13.2.

The Photometric Interpretation (0028,0004) shall be RGB for uncompressed or lossless compressed transfer syntaxes that do not involve color space transformations, YBR_ICT for irreversible JPEG2000 transfer syntaxes, YBR_RCT for reversible JPEG2000 transfer syntaxes, YBR_PARTIAL_420 for MPEG2 transfer syntaxes and YBR_FULL_422 for other lossy compressed transfer syntaxes.

The Pixel Presentation (0008,9205) shall be TRUE_COLOR.

A.36.4.4 Enhanced MR Color Image Functional Group Macros

Table A.36-2 specifies the use of the Functional Group macros used in the Multi-frame Functional Groups Module for the Enhanced MR Color Image IOD.