DICOM PS3.3 2019a - Information Object Definitions

C.8.13.2 MR Image and Spectroscopy Instance Macro

Table C.8-83 specifies the common Attributes Enhanced MR Image Module and MR Spectroscopy Module.

Table C.8-83. MR Image and Spectroscopy Instance Macro Attributes

Attribute Name

Tag

Type

Attribute Description

Acquisition Number

(0020,0012)

3

A number identifying the single continuous gathering of data over a period of time that resulted in this image.

Note

This number is not required to be unique across SOP Instances in a Series. See also the description of the Referenced Raw Data Sequence (0008,9121).

Acquisition DateTime

(0008,002A)

1C

The date and time that the acquisition of data started.

Note

The synchronization of this time with an external clock is specified in the synchronization Module in Acquisition Time synchronized (0018,1800).

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED and SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.

Acquisition Duration

(0018,9073)

1C

The time in seconds needed to run the prescribed pulse sequence. See Section C.7.6.16.2.2.1 for further explanation.

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED and SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.

Referenced Raw Data Sequence

(0008,9121)

3

The Raw data that was used to derive this Image.

One or more Items are permitted in this Sequence.

Note

The Items of in this Sequence may identify raw data that has not been stored or encoded as a DICOM object. This allows recognition that images and spectra in different instances have been reconstructed from the same raw data.

>Include Table C.17-3 “Hierarchical SOP Instance Reference Macro Attributes”

Referenced Waveform Sequence

(0008,113A)

3

References to waveforms acquired in conjunction with this image. These Waveforms may or may not be temporally synchronized with this image.

One or more Items are permitted in this Sequence.

>Include Table C.17-3 “Hierarchical SOP Instance Reference Macro Attributes”

Referenced Image Evidence Sequence

(0008,9092)

1C

Full set of Composite SOP Instances referred to inside the Referenced Image Sequences of this Enhanced MR Image SOP Instance. See Section C.8.13.2.1.2 for further explanation.

One or more Items shall be included in this Sequence.

Required if the Referenced Image Sequence (0008,1140) is present.

>Include Table C.17-3 “Hierarchical SOP Instance Reference Macro Attributes”

Source Image Evidence Sequence

(0008,9154)

1C

Full set of Composite SOP Instances referred to inside the Source Image Sequences of this Enhanced MR Image SOP Instance. See Section C.8.13.2.1.2 for further explanation.

One or more Items shall be included in this Sequence.

Required if the Source Image Sequence (0008,2112) is present.

>Include Table C.17-3 “Hierarchical SOP Instance Reference Macro Attributes”

Referenced Presentation State Sequence

(0008,9237)

1C

References to Presentation State instances acquired in conjunction with this instance.

Note

May only be used to reference Presentation States belonging to the acquired data and not to reference Presentation States generated subsequently such as during interpretation.

One or more Items shall be included in this Sequence.

Required if Presentation State is generated during acquisition, shall not be present otherwise.

>Include Table C.17-3 “Hierarchical SOP Instance Reference Macro Attributes”

Content Qualification

(0018,9004)

1C

Content Qualification Indicator

Enumerated Values:

PRODUCT

RESEARCH

SERVICE

See Section C.8.13.2.1.1 for further explanation.

Required if SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted), may be present otherwise.

Resonant Nucleus

(0018,9100)

1C

Nucleus that is resonant at the transmitter frequency.

Defined Terms:

1H

3HE

7LI

13C

19F

23NA

31P

129XE

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED and SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.

k-space Filtering

(0018,9064)

1C

Describes k-space filtering applied. Shall be NONE if no k-space filter.

Defined Terms:

COSINE

COSINE_SQUARED

FERMI

GAUSSIAN

HAMMING

HANNING

LORENTZIAN

LRNTZ_GSS_TRNSFM

RIESZ

TUKEY

NONE

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED and SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.

Magnetic Field Strength

(0018,0087)

1C

Nominal field strength of the MR Magnet, in Tesla.

Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED and SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.

Applicable Safety Standard Agency

(0018,9174)

1C

Agency that established MR safety standard applicable to the acquisition of this Instance.

Defined Terms:

IEC

FDA

MHW

Required if SOP Class UID is not "1.2.840.10008.5.1.4.1.1.4.4" (Legacy Converted). May be present otherwise.

Applicable Safety Standard Description

(0018,9175)

3

Name and Version of the applicable standard.

Image Comments

(0020,4000)

3

User-defined comments about the image.

Isocenter Position

(300A,012C)

3

Isocenter coordinates (x,y,z), in mm. Specifies the location of the machine isocenter in the Patient-Based Coordinate System associated with the Frame of Reference. It allows transformation from the Equipment-Based Coordinate System to the Patient-Based Coordinate System.

B1rms

(0018,1320)

3

B1+ rms value in units of micro_tesla (uT) for the acquisition producing the image. See [IEC 60601-2-33].


C.8.13.2.1 MR Image and Spectroscopy Instance Macro Attribute Description
C.8.13.2.1.1 Content Qualification

Content Qualification (0018,9004) shall have the value PRODUCT if the content (image or Spectroscopy data) was produced with approved hardware and software. It shall have the value RESEARCH or SERVICE if there is any doubt as to whether the content was produced with approved hardware and software.

If data with Content Qualification (0018,9004) of RESEARCH or SERVICE is used to derive other content then it is expected that this derived content will also have Content Qualification (0018,9004) set to RESEARCH or SERVICE.

The intent of this element is to allow annotation of an advisory message that indicates that this content may not be suitable for clinical interpretation.

C.8.13.2.1.2 Evidence Sequence Attributes

The intent of the Referenced Image Evidence Sequence (0008,9092) and Source Image Evidence Sequence (0008,9154) is to provide a list of all unique SOP Instances listed in the Referenced Image Sequence (0008,1140) and Source Image Sequence (0008,2112) Attributes respectively.

DICOM PS3.3 2019a - Information Object Definitions