Материал: part03

DICOM PS3.3 2020a - Information Object Definitions​ Page 581​

Table C.7.6.16-17. Frame Display Shutter Macro Attributes​

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

>Include Table C.7-17a “Display Shutter Macro Attributes”​

C.7.6.16.2.17 Respiratory Synchronization Macro​

Table C.7.6.16-18 specifies the Attributes of the Respiratory Synchronization Functional Group Macro.​

Table C.7.6.16-18. Respiratory Synchronization Macro Attributes​

Enumerated Values:​

INSPIRATION​

MAXIMUM​

EXPIRATION​

MINIMUM​

Required if Starting Respiratory Amplitude (0020,9246) is present.​

- Standard -​

Enumerated Values:​

INSPIRATION​

MAXIMUM​

EXPIRATION​

MINIMUM​

Required if Ending Respiratory Amplitude (0020,9248) is present.​

C.7.6.16.2.17.1 Relationship of Respiratory Timing Attributes​

For time based respiratory gating, the Nominal Respiratory Trigger Delay Time (0020,9255) is the prescribed trigger delay time in ms​ fromthepreviousRespiratory-peaktothevalueofFrameReferenceDateTime(0018,9151).Whenframesareacquiredwithprospective​ gating, that is, the data acquisition actually begins in response to a timed delay from the Respiratory trigger, it may be that Actual​ Respiratory Trigger Delay Time (0020,9257) and the Nominal Respiratory Trigger Delay Time (0020,9255) have the same value.​

However, when frames are the result of retrospective gating, that is, the data is continuously acquired and then later compared with​ a simultaneously acquired respiratory waveform and fitted into bins corresponding to nominal phases of the respiratory cycle, then​ Nominal Respiratory Trigger Delay Time (0020,9255) and the Actual Respiratory Trigger Delay Time (0020,9257) may have different​ values.​

Figure C.7.6.16-9a and Figure C.7.6.16-9b depict the usage.​

Respiratory Interval time (0020,9254)

Delay Threshold (0020,9256)

0 %

Nominal Respiration Trigger Delay Time (0020,9255): delay in ms after previous maximum.

Figure C.7.6.16-9a. Respiratory Timing Tags​

100 %

0 %

Starting Respiratory

Amplitude (0020,9246)

Figure C.7.6.16-9b. Relationship of Respiratory Amplitude Attributes​

C.7.6.16.2.18 Irradiation Event Identification Macro​

Table C.7.6.16-19 specifies the Attributes containing the Irradiation Event Identification Functional Group Macro.​

- Standard -​

DICOM PS3.3 2020a - Information Object Definitions​ Page 583​

Table C.7.6.16-19. Irradiation Event Identification Macro Attributes​

C.7.6.16.2.19 Radiopharmaceutical Usage Macro​

Table C.7.6.16.2-20 specifies the Attributes of the Radiopharmaceutical Usage Functional Group Macro.​

Table C.7.6.16.2-20. Radiopharmaceutical Usage Macro Attributes​

C.7.6.16.2.20 Patient Physiological State Macro​

Table C.7.6.16.2-21 specifies the Attributes of the Patient Physiological State Functional Group Macro, which describes the​ physiological state of the patient.​

Table C.7.6.16.2-21. Patient Physiological State Macro Attributes​

C.7.6.16.2.21 Plane Position (Volume) Macro​

Table C.7.6.16.2.21-1 specifies the Attributes of the Plane Position (Volume) Functional Group Macro.​

Table C.7.6.16.2.21-1. Plane Position (Volume) Macro Attributes​

C.7.6.16.2.22 Plane Orientation (Volume) Macro​

Table C.7.6.16.2.22-1 specifies the Attributes of the Plane Orientation (Volume) Functional Group Macro.​

- Standard -​

Page 584​ DICOM PS3.3 2020a - Information Object Definitions​

Table C.7.6.16.2.22-1. Plane Orientation (Volume) Macro Attributes​

C.7.6.16.2.23 Temporal Position Macro​

Table C.7.6.16.2.23-1 specifies the Attributes of the Temporal Position Functional Group Macro.​

Table C.7.6.16.2.23-1. Temporal Position Macro Attributes​

C.7.6.16.2.24 Image Data Type Macro​

Table C.7.6.16.2.24-1 specifies the Attributes of the Image Data Type Functional Group Macro.​

Table C.7.6.16.2.24-1. Image Data Type Macro Attributes​

Enumerated Values:​

YES​data are aliased values​

NO​ data are not aliased values​

See Section C.7.6.16.2.24.2 for further explanation.​

See Section C.7.6.16.2.24.3 for further information.​

Required if Data Type (0018,9808) is TISSUE_VELOCITY,​

FLOW_VELOCITYorDIRECTION_POWER.Maybepresentotherwise.​

C.7.6.16.2.24.1 Data Type​

Data Type (0018,9808) indicates the data type of an image frame. Table C.7.6.16.2.24.1-1 lists Defined Terms for this value.​

Table C.7.6.16.2.24.1-1. Data Type Defined Terms​

- Standard -​

C.7.6.16.2.24.2 Aliased Data Type​

Some data types require special treatment when interpolating data values whose type is "aliased", such as FLOW_VELOCITY when​ derived from discrete data samples as is done for PW Doppler or sampled CW Doppler. Values of these types are "cyclical" in that​ themaximumvalueshouldbeconsideredadjacenttotheminimumvalueinanyinterpolationalgorithm.AliasedDataType(0018,980B)​ indicates whether modular arithmetic is necessary for the associated data type.​

Note​

For example, when Data Type (0018,9808) is FLOW_VELOCITY, Aliased Data Type (0018,980B) should be set to YES in-​ dicating that an interpolation algorithm should support aliased data. When several FLOW_VELOCITY values near the max-​ imumorminimumareinterpolated,thisalgorithmshouldproduceavaluenearthemaximumorminimum.Itwouldbeincorrect​ to use an interpolation algorithm such as the arithmetic mean, which would erroneously produce a result near the mid-point​ of the range.​

C.7.6.16.2.24.3 Zero Velocity Pixel Value​

Certain data types represent velocity that is directional by nature. For these data types, there shall be one particular pixel data value​ that corresponds to zero velocity. Zero Velocity Pixel Value (0018,9810) indicates the pixel data value corresponding to zero velocity.​

TheVRofZeroVelocityPixelValue(0018,9810)correspondstothevalueofPixelRepresentation(0028,0103):IfPixelRepresentation​ (0028,0103) is 0000H (unsigned integer), the VR of Zero Velocity Pixel Value (0018,9810) shall be US; otherwise the VR of Zero​ Velocity Pixel Value (0018,9810) shall be SS.​

C.7.6.16.2.25 Unassigned Shared and Per-frame Converted Attributes Macros​

Attributes that are present in the Classic images to be converted but that are not defined in specific Modules or specific Functional​ Groups required or supported by the IOD, or have their values changed during conversion, either may:​

•​be identical in all images, in which case they shall be included in the top level Data Set or in the Unassigned Shared Converted​ Attributes Sequence, or​

•​only be present in some images, or have a different number of values, or different values, in which case they shall be included in​ the Unassigned Per-Frame Converted Attributes Sequence.​

Note​

1.​An example of an Attribute that might be included in the Unassigned Shared Converted Attributes Macro is Filter Type​ (0018,1160), which typically would be the same for all Classic CT images in a set, and is not included in any modality-​ specific Module or Functional Group Macro.​

2.​An example of an Attribute that might be included in the Unassigned Per-Frame Converted Attributes Macro is Slice​ Location (0020,1041), which typically would be different for each Classic CT image in a set, and is not included in any​ modality-specific Module or Functional Group Macro.​

- Standard -​