Материал: part03

Note​

An Image may contain references to itself (e.g., to other frames within itself).​

C.7.6.16.2.6 Derivation Image Macro​

Table C.7.6.16-7 specifies the Attributes of the Derivation Image Functional Group Macro.​

Table C.7.6.16-7. Derivation Image Macro Attributes​

Required if SOP Class UID is not "1.2.840.10008.5.1.4.1.1.2.2" (Legacy​ ConvertedEnhancedCTImageStorage)andnot"1.2.840.10008.5.1.4.1.1.4.4"​ (Legacy Converted Enhanced MR Image Storage) and not​ "1.2.840.10008.5.1.4.1.1.128.1" (Legacy Converted Enhanced PET Image​ Storage), may be present otherwise.​

>>>Include Table 8.8-1 “Code Sequence Macro​ DCID 7202 “Source Image Purposes of Reference”.​ Attributes”​

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Enumerated Values:​

YES​

NO​

REORIENTED_ONLY​A projection radiograph that has been flipped, and/or​ rotated by a multiple of 90 degrees​

Note​

1.​This applies not only to images with a known relationship to a​ 3D space, but also to projection images. For example, a​ projection radiograph such as a mammogram that is processed​ by a point image processing operation such as contrast​ enhancement, or a smoothing or edge enhancing convolution,​ would have a value of YES for this Attribute. A projection​ radiograph that had been magnified or warped geometrically​ would have a value of NO for this Attribute. A projection​ radiograph that has been flipped, and/or rotated by a multiple of​ 90degrees,suchthattransformationofpixellocationsispossible​ by comparison of the values of Patient Orientation (0020,0020)​ would have a value of REORIENTED_ONLY. This Attribute is​ typicallyofimportanceinrelatingimageswithPresentationIntent​ Type (0008,0068) values of FOR PROCESSING and FOR​ PRESENTATION.​

2.​When the value of this Attribute is NO, it is not possible to locate​ on the current image any pixel coordinates that are referenced​ relative to the source image, such as for example, might be​ required for rendering CAD findings derived from a referenced​ FORPROCESSINGimageonthecurrentFORPRESENTATION​ image.​

Required if the value of Spatial Locations Preserved (0028,135A) is​

REORIENTED_ONLY.​

C.7.6.16.2.7 Cardiac Synchronization Macro​

Table C.7.6.16-8 specifies the Attributes of the Cardiac Synchronization Functional Group Macro.​

Table C.7.6.16-8. Cardiac Synchronization Macro Attributes​

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C.7.6.16.2.7.1 Relationship of Cardiac Timing Attributes​

The Nominal Cardiac Trigger Delay Time (0020,9153) is the nominal trigger delay time in ms from the previous R-peak to the value​ of Frame Reference DateTime (0018,9151). When frames are acquired with prospective gating, that is, the data acquisition actually​ begins in response to a timed delay from the R-peak, it may be that Actual Cardiac Trigger Delay Time (0020,9252) and the Nominal​ Cardiac Trigger Delay Time (0020,9153) 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 ECG waveform and fitted into time slots corresponding to nominal phases of the cardiac cycle, then​ Nominal Cardiac Trigger Delay Time (0020,9153) and the Actual Cardiac Trigger Delay Time (0020,9252) may have different values.​ When applicable the same is valid for the Nominal Cardiac Trigger Time Prior to R-peak (0020,9154) and the Actual Cardiac Trigger​ Time Prior to R-peak (0020,9155) Attributes.​

When multiple cardiac cycles are averaged together, then the Low R-R Value (0018,1081), and High R-R Value (0018,1082) are an​ average of the cardiac cycles that were accepted in the frame.​

Note​

For cardiac gated acquisitions the choice of the Frame Reference DateTime (0018,9151) is influenced by the Nominal Car-​ diac Trigger Delay Time (0020,9153). For respiratory gated acquisitions the choice of the Frame Reference DateTime​ (0018,9151) is influenced by the Nominal Respiratory Trigger Delay Time (0020,9255).​

Figure C.7.6.16-5a depicts the usage.​

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Cardiac R-R Interval Specified (0018,9070):

R - R interval in ms at prescription time

OR...

R R

R - R Interval Time Nominal (0020,9251):

Actual measured R - R peak of this cycle.

Nominal Cardiac Trigger Delay Time (0020,9153): nominal delay in ms after previous R-peak.

Figure C.7.6.16-5a. Cardiac Timing Tags​

NominalCardiacTriggerTimePriortoR-peak(0020,9154)andtheActualCardiacTriggerTimePriortoR-peak(0020,9155)Attributes​ can be used to store a time of the next R-peak to the value of Frame Reference DateTime (0018,9151) expressed as a negative​ value. In this case the Actual Cardiac Trigger Delay Time (0020,9252), when present, and the Nominal Cardiac Trigger Delay Time​ (0020,9153) shall contain a value calculated based on the R-R interval applicable for this frame. See Figure C.7.6.16-5b.​

Cardiac R-R Interval Specified (0018,9070):

R - R interval in ms at prescription time

OR...

R R

R - R Interval Time Nominal (0020,9251):

Actual measured R - R peak of this cycle.

Nominal Cardiac Trigger Time Prior to R-peak (0020,9154):

Nominal time interval in ms prior to next R-peak.

Nominal Cardiac Trigger Delay Time (0020,9153) as calculated:

R-R interval time minus the Nominal Cardiac Trigger Time Prior to R-peak (0020,9154)

Figure C.7.6.16-5b. Cardiac Timing Relationships​

Note​

SpecifyingthetimeintervalpriortotheR-peakisrelevantforapplicationssuchascapturingP-andQ-waverelatedmorphology.​

C.7.6.16.2.8 Frame Anatomy Macro​

Table C.7.6.16-9 specifies the Attributes of the Frame Anatomy Functional Group Macro.​

Table C.7.6.16-9. Frame Anatomy Macro Attributes​

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Enumerated Values:​

R​right​

L​left​

U​unpaired​

B​both left and right​

Note​

ThisAttributeismandatory,inordertoensurethatframesmaybe​ positioned correctly relative to one another for display.​

Shall be consistent with any laterality information contained in Primary​

Anatomic Structure Modifier Sequence (0008,2230), if present.​

>Include Table 10-5 “General Anatomy Mandatory Macro​Defined CID for the Anatomic Region Sequence is CID 4030 “CT, MR​ Attributes”​ and PET Anatomy Imaged”.​

Defined CID for Anatomic Region Modifier Sequence (0008,2220) and​ Primary Anatomic Structure Modifier Sequence (0008,2230) is CID 2​ “Anatomic Modifier”.​

C.7.6.16.2.9 Pixel Value Transformation Macro​

Table C.7.6.16-10 specifies the Attributes of the Pixel Value Transformation Functional Group Macro.​

Note​

This Macro is equivalent with the Modality LUT transformation in non Multi-frame IODs.​

Table C.7.6.16-10. Pixel Value Transformation Macro Attributes​

See Section C.11.1.1.2 for further explanation.​

Enumerated Values:​

US​Unspecified if Modality (0008,0060) equals MR or PT.​

Note​

Window Center (0028,1050) and Window Width (0028,1051) are applied after Rescale Slope (0028,1053) and Rescale In-​ tercept (0028,1054) have been applied to Stored Pixel Values, see Section C.11.2.1.2.​

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