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MR Modifier Sequence
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(0018,9115)
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1
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Identifies general acquisition parameters of this frame.
Only a single Item shall be included in this Sequence.
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>Inversion Recovery
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(0018,9009)
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1C
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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.
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>Inversion Times
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(0018,9079)
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1C
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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.
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>Flow Compensation
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(0018,9010)
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1C
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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.
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>Flow Compensation Direction
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(0018,9183)
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1C
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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.
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>Spoiling
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(0018,9016)
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1C
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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.
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>T2 Preparation
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(0018,9021)
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1C
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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.
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>Spectrally Selected Excitation
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(0018,9026)
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1C
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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.
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>Spatial Pre-saturation
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(0018,9027)
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1C
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Spatial Pre-saturation.
Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.
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>Partial Fourier
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(0018,9081)
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1C
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Partial Fourier.
Enumerated Values:
-
YES
-
-
NO
-
Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.
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>Partial Fourier Direction
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(0018,9036)
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1C
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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.
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>Parallel Acquisition
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(0018,9077)
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1C
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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.
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>Parallel Acquisition Technique
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(0018,9078)
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1C
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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.
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>Parallel Reduction Factor In-plane
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(0018,9069)
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1C
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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.
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>Parallel Reduction Factor out-of-plane
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(0018,9155)
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1C
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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.
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>Parallel Reduction Factor Second In-plane
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(0018,9168)
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1C
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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.
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