DICOM PS3.3 2020b - Information Object Definitions

C.8.13.3 MR Image Description Macro (Current)
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#### C.8.13.3 MR Image Description Macro

This section describes the MR Image Description Macro.

Table C.8-84 specifies the Attributes of the MR Image Description Macro.

Table C.8-84. MR Image Description Macro Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Complex Image Component | (0008,9208) | 1C | Representation of complex data of frames in the SOP Instance. See Section C.8.13.3.1.1 for a description and Defined Terms. Required if SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.
Acquisition Contrast | (0008,9209) | 1C | Indication of acquisition contrast used with frames in the SOP Instance. See Section C.8.13.3.1.2 for a description and Defined Terms. Required if SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.
Functional Settling Phase Frames Present | (0018,9622) | 3 | Specifies if the acquisition used and stored settling phases. Enumerated Values: YES NO

##### C.8.13.3.1 MR Image Description Attribute Description

###### C.8.13.3.1.1 Complex Image Component

The value of Complex Image Component (0008,9208) Attribute shall be used to indicate which component of the complex representation of the signal is represented in the pixel data.

Table C.8-85 specifies the Defined Terms for Complex Image Component (0008,9208).

Table C.8-85. Complex Image Component Attribute Values

Defined Term Name | Defined Term Description
--- | ---
MAGNITUDE | The magnitude component of the complex image data.
PHASE | The phase component of the complex image data.
REAL | The real component of the complex image data.
IMAGINARY | The imaginary component of the complex image data.
MIXED | Used only as a value in Complex Image Component (0008,9208) in the Enhanced MR Image Module if frames within the image SOP Instance contain different values for the Complex Image Component Attribute in the MR Frame Type Functional Group.

###### C.8.13.3.1.2 Acquisition Contrast

Table C.8-86 specifies the Defined Terms for Acquisition Contrast (0008,9209).

Table C.8-86. Acquisition Contrast Values

Defined Term Name | Defined Term Description
--- | ---
DIFFUSION | Diffusion weighted contrast
FLOW_ENCODED | Flow Encoded contrast
FLUID_ATTENUATED | Fluid Attenuated T2 weighted contrast
PERFUSION | Perfusion weighted contrast
PROTON_DENSITY | Proton Density weighted contrast
STIR | Short Tau Inversion Recovery
TAGGING | Superposition of thin saturation bands onto image
T1 | T1 weighted contrast
T2 | T2 weighted contrast
T2_STAR | T2* weighted contrast
TOF | Time Of Flight weighted contrast
UNKNOWN | Value should be UNKNOWN if acquisition contrasts were combined resulting in an unknown contrast. Also this value should be used when the contrast is not known.
MIXED | Used only as a value in Acquisition Contrast (0008,9209) Attribute in the Enhanced MR Image Module Attribute Description if frames within the image SOP Instance contain different values for the Acquisition Contrast Attribute in the MR Frame Type Functional Group.

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DICOM PS3.3 2020b - Information Object Definitions