DICOM PS3.3 2020b - Information Object Definitions
C.8.13.5.5 MR Modifier Macro

Table C.8-92 specifies the Attributes of the MR Modifier Functional Group Macro.

Table C.8-92. MR Modifier Macro Attributes

Attribute Name

Tag

Type

Attribute Description

MR Modifier Sequence

(0018,9115)

1

Identifies general acquisition parameters of this frame.

Only a single Item shall be included in this Sequence.

>Inversion Recovery

(0018,9009)

1C

Inversion Recovery preparatory sequence.

Enumerated Values:

YES

NO

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Inversion Times

(0018,9079)

1C

Times in ms after the middle of inverting RF pulse to middle of excitation pulse to detect the amount of longitudinal magnetization.

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Inversion Recovery (0018,9009) equals YES.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Inversion Recovery (0018,9009) equals YES.

>Flow Compensation

(0018,9010)

1C

Flow Compensation.

Defined Terms:

ACCELERATION

VELOCITY

OTHER

NONE

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Flow Compensation Direction

(0018,9183)

1C

Flow Compensation Direction.

Enumerated Values:

PHASE

FREQUENCY

SLICE_SELECT

SLICE_AND_FREQ

SLICE_FREQ_PHASE

PHASE_AND_FREQ

SLICE_AND_PHASE

OTHER

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Flow Compensation (0018,9010) equals other than NONE.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Flow Compensation (0018,9010) equals other than NONE.

>Spoiling

(0018,9016)

1C

Spoiling.

Enumerated Values:

RF

RF spoiled

GRADIENT

gradient spoiled

RF_AND_GRADIENT

NONE

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Echo Pulse Sequence (0018,9008) equals GRADIENT or BOTH.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Echo Pulse Sequence (0018,9008) equals GRADIENT or BOTH.

>T2 Preparation

(0018,9021)

1C

T2 prepared Pulse Sequence.

Enumerated Values:

YES

NO

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Spectrally Selected Excitation

(0018,9026)

1C

Spectrally Selected Excitation.

Enumerated Values:

WATER

water excitation

FAT

fat excitation

NONE

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Spatial Pre-saturation

(0018,9027)

1C

Spatial Pre-saturation.

Defined Terms:

SLAB

NONE

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Partial Fourier

(0018,9081)

1C

Partial Fourier.

Enumerated Values:

YES

NO

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Partial Fourier Direction

(0018,9036)

1C

Direction of Partial Fourier.

Enumerated Values:

PHASE

FREQUENCY

SLICE_SELECT

COMBINATION

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Partial Fourier (0018,9081) equals YES.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Partial Fourier (0018,9081) equals YES.

>Parallel Acquisition

(0018,9077)

1C

Parallel acquisition has been used to reduce measurement time.

Enumerated Values:

YES

NO

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.

>Parallel Acquisition Technique

(0018,9078)

1C

Parallel acquisition characteristics.

Defined Terms:

PILS

SENSE

SMASH

OTHER

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Parallel Acquisition (0018,9077) equals YES.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Parallel Acquisition (0018,9077) equals YES.

>Parallel Reduction Factor In-plane

(0018,9069)

1C

Measurement time reduction factor expressed as ratio of original and reduced measurement time for the in-plane direction.

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Parallel Acquisition (0018,9077) equals YES.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Parallel Acquisition (0018,9077) equals YES.

>Parallel Reduction Factor out-of-plane

(0018,9155)

1C

Measurement time reduction factor expressed as ratio of original and reduced measurement time for the out-of-plane direction

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Parallel Acquisition (0018,9077) equals YES.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Parallel Acquisition (0018,9077) equals YES.

>Parallel Reduction Factor Second In-plane

(0018,9168)

1C

Measurement time reduction factor expressed as ratio of original and reduced measurement time for the second in-plane direction.

Only required for MR Spectroscopy SOP Instances.

Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL and Parallel Acquisition (0018,9077) equals YES.

Otherwise may be present if Frame Type (0008,9007) Value 1 is DERIVED and Parallel Acquisition (0018,9077) equals YES.


DICOM PS3.3 2020b - Information Object Definitions