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Page 966​

DICOM PS3.3 2020a - Information Object Definitions​

 

 

 

Labeling

 

 

 

 

 

 

 

 

 

 

 

 

 

control none Bolus Cut-off

Slice by Slice Acquisition

 

ASL Pulse Train Duration

 

 

 

 

 

 

 

 

 

 

 

 

 

 

time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(0018,9258)

[ms]

 

 

 

 

 

 

 

 

 

 

 

Bolus Cut-off Delaytime

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(0018,925F)

[ms]

 

 

 

 

 

 

 

 

 

 

Frame Reference DateTime (0018,9151) (per frame)

Inversion Times (0018,9079) [ms] (per frame)

Bolus Cut-off Delay Time (0018,925F) [ms]

Inversion Times (0018,9079) [ms]

(from end of Pulse Train to Frame Reference DateTime)

ASL Pulse Train Duration (0018,9258 ) [ms]

Bolus Cut-off Technique Description (0018,925E) [text]

Frame Reference DateTime (0018,9151) (provides the absolute timing [DT])

Figure C.8.13.5.14-1. Attributes for Quantitative ASL​

C.8.13.5.15 Functional MR Macro​

Table C.8-100c specifies the Attributes of the Functional MR Group Macro.​

Table C.8-100c. Functional MR Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Functional MR Sequence​

(0018,9621)​

1​

Identifies the Functional parameters of this frame.​

 

 

 

Only a single Item shall be included in this Sequence.​

>Settling Phase Frame​

(0018,9624)​

1C​

Identifies if the frame is part of a Functional MR settling phase. All​

 

 

 

frames with the same combination of Stack ID (0020,9056) and​

 

 

 

Temporal Position Index (0020,9128) shall have the same value.​

Enumerated Values:​

YES​

NO​

Required if Functional Settling Phase Frames Present (0018,9622) is​

YES.​

>Functional Sync Pulse​

(0018,9623)​

1​ The date and time of the Functional Sync Pulse for this frame.​

See Section C.8.13.5.15.1​

C.8.13.5.15.1 Functional Sync Pulse​

FunctionalStudiesrequiresynchronizationbetweentheAcquisitionModalityandexternaldevicestocoordinateparadigmpresentation​ by an external system with image acquisition. It is required that the Acquisition Time Synchronized (0018,1800) shall be "Y".​

The Functional Sync Pulse (0018,9623) is the date-time stamp of the pulse at the start of the acquired volume(s) in the SOP Instance.​

All frames with the same combination of Stack ID (0020,9056) and Temporal Position Index (0020,9128) share the same time stamp.​

C.8.13.6 MR Series Module​

The MR IODs use the General Series Module, specialized by the MR Series Module, to describe the DICOM Series Entity described​ in Section A.1.2.3, and to define what constitutes a Series for the context of MR device.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 967​

Table C.8-101 specifies the Attributes that identify and describe general information about the MR Series.​

 

 

Table C.8-101. MR Series Module Attributes​

 

Attribute Name​

Tag​

Type​

Attribute Description​

 

Modality​

(0008,0060)​

1​

Type of equipment that originally acquired the data used to​

 

 

 

create the images in this Series.​

 

 

 

 

Enumerated Values:​

 

 

 

 

MR​

 

 

 

 

See Section C.7.3.1.1.1 for further explanation.​

 

Referenced Performed​

(0008,1111)​

1C​

Uniquely identifies the Performed Procedure Step SOP​

Procedure Step Sequence​

 

 

Instance to which the Series is related.​

 

Only a single Item shall be included in this Sequence.​

Required if a Performed Procedure Step SOP Class was​ involved in the creation of this Series.​

>Include Table 10-11 “SOP Instance Reference Macro Attributes”​

C.8.14 MR Spectroscopy Modules​

This section describes the MR Spectroscopy Modules.​

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".​

C.8.14.1 MR Spectroscopy Module​

Table C.8-102 specifies the Attributes of the MR Spectroscopy Module.​

Table C.8-102. MR Spectroscopy Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

IncludeTableC.8-83“MRImageandSpectroscopyInstance​

Macro Attributes”​

 

 

 

Image Type​

(0008,0008)​

1​

Spectroscopy data characteristics. See Section C.8.14.5.1.1.​

IncludeTableC.8-107“MRSpectroscopyDescriptionMacro​

Attributes”​

 

 

 

Transmitter Frequency​

(0018,9098)​

1C​

Precession frequency in MHz of the nucleus being addressed for each​

 

 

 

spectral axis.​

 

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL. May be​

 

 

 

present otherwise.​

Spectral Width​

(0018,9052)​

1C​

Spectral width in Hz.​

 

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

May be present otherwise.​

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Page 968​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

ChemicalShiftReference​

(0018,9053)​

1C​

The chemical shift at the transmitter frequency in ppm.​

 

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

 

 

 

May be present otherwise.​

Volume Localization​

(0018,9054)​

1C​

Name of volume localization technique used. Shall be "NONE" if no​

Technique​

 

 

spatial localization was performed.​

 

 

 

Defined Terms:​

 

 

 

ILOPS​

 

 

 

ISIS​

 

 

 

PRIME​

 

 

 

PRESS​

 

 

 

SLIM​

 

 

 

SLOOP​

 

 

 

STEAM​

 

 

 

NONE​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

 

 

 

May be present otherwise.​

Volume Localization​

(0018,9126)​

1C​

A Sequence of Items that provide the position of RF excitations used​

Sequence​

 

 

to select a volume of tissue. The selected volume is described by the​

 

 

 

intersection of the Sequence Items.​

 

 

 

One or more Items shall be included in this Sequence.​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED​

 

 

 

and Volume Localization Technique (0018,9054) is other than NONE.​

 

 

 

May be present if Volume Localization Technique (0018,9054) is other​

 

 

 

than NONE.​

>Slab Thickness​

(0018,9104)​

1​

Thickness of slab in mm.​

>Slab Orientation​

(0018,9105)​

1​

The direction cosines of a normal vector perpendicular to the selection​

 

 

 

plane with respect to the patient. See Section C.7.6.2.1.1 for further​

 

 

 

explanation.​

>Mid Slab Position​

(0018,9106)​

1​

The x, y, and z coordinates of the mid-point of the slab in mm. See​

 

 

 

Section C.7.6.2.1.1 for further explanation.​

De-coupling​

(0018,9059)​

1C​

Indicates whether de-coupling was active.​

 

 

 

Enumerated Values:​

YES​

NO​

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

May be present otherwise.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 969​

Attribute Name​

Tag​

Type​

Attribute Description​

 

De-coupled Nucleus​

(0018,9060)​

1C​

Nucleus being de-coupled.​

 

 

 

 

Defined Terms:​

 

 

 

 

1H​

 

 

 

 

3HE​

 

 

 

 

7LI​

 

 

 

 

13C​

 

 

 

 

19F​

 

 

 

 

23NA​

 

 

 

 

31P​

 

 

 

 

129XE​

 

 

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

 

 

 

Required if De-coupling (0018,9059) equals YES.​

 

De-coupling Frequency​

(0018,9061)​

1C​

The center frequency (Hz) for the de-coupling.​

 

 

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

 

 

 

Required if De-coupling (0018,9059) equals YES.​

 

De-coupling Method​

(0018,9062)​

1C​

The de-coupling modulation scheme used.​

 

 

 

 

Defined Terms:​

 

 

 

 

MLEV​

 

 

 

 

WALTZ​

 

 

 

 

NARROWBAND​

 

 

 

 

Required if De-coupling (0018,9059) equals YES.​

 

De-coupling Chemical​

(0018,9063)​

1C​

The chemical shift in ppm at the de-coupling frequency.​

 

Shift Reference​

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

 

 

 

 

 

 

Required if De-coupling (0018,9059) equals YES.​

 

Time Domain Filtering​

(0018,9065)​

1C​

Describes time domain filtering or apodization applied. Shall be NONE​

 

 

 

if no filtering operations were applied to the time domain data.​

Defined Terms:​

COSINE​

COSINE_SQUARED​

EXPONENTIAL​

GAUSSIAN​

HAMMING​

HANNING​

LORENTZIAN​

LRNTZ_GSS_TRNSFM​

NONE​

See Section C.8.14.1.1 for further explanation of the ordering.​

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

May be present otherwise.​

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Page 970​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Number of Zero Fills​

(0018,9066)​

1C​

Number of zero fills added to the time domain data before FT. Shall be​

 

 

 

0 (zero) if no zero filling performed.​

 

 

 

See Section C.8.14.1.1 for further explanation of the ordering.​

 

 

 

See Section C.8.14.1.2 for further explanation on Zero Fills.​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

 

 

 

May be present otherwise.​

Baseline Correction​

(0018,9067)​

1C​

Describesbaselinecorrectiontechniques.ShallbeNONEifnobaseline​

 

 

 

correction was performed.​

 

 

 

Defined Terms:​

 

 

 

LINEAR_TILT​

 

 

 

LOCAL_LINEAR_FIT​

 

 

 

POLYNOMIAL_FIT​

 

 

 

SINC_DECONVOLUTN​

 

 

 

TIME_DOMAIN_FIT​

 

 

 

SPLINE​

 

 

 

NONE​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

 

 

 

May be present otherwise.​

Frequency Correction​

(0018,9101)​

1C​

Specifies whether operations were performed to correct resonant​

 

 

 

frequency of metabolite peaks due to B0 field inhomogeneities.​

 

 

 

Enumerated Values:​

 

 

 

YES​

 

 

 

NO​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

 

 

 

May be present otherwise.​

First Order Phase​

(0018,9198)​

1C​

Describeswhetherafirstorder(frequencydependent)phasecorrection​

Correction​

 

 

was applied to the spectral data.​

 

 

 

Enumerated Values:​

 

 

 

YES​

 

 

 

NO​

 

 

 

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

 

 

 

May be present otherwise.​

Water Referenced Phase​

(0018,9199)​

1C​

Indicates if the images or spectra were created using Water Reference​

Correction​

 

 

time domain data for phase correction.​

Enumerated Values:​

YES​

NO​

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED.​

May be present otherwise.​

See Section C.8.14.1.3 for relation between Water Reference data and​ other Spectroscopic objects.​

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