Материал: part03

FEET_TO_HEAD​Slicesclosesttothepatient'sfeetwereacquiredfirst.​ HEAD_TO_FEET​Slices closest to the patient's head were acquired​

first.​

C.8.22.2.1 Enhanced PET Acquisition Module Attribute Descriptions​

C.8.22.2.1.1 Acquisition Start Condition​

Acquisition Start Condition (0018,0073) is the method of starting acquisition data collection.​

Defined Terms:​

DENS​ preset count density (counts/sec) was reached​

RDD​ preset relative count density difference (change in counts/sec) was reached​

MANU​ acquisition was started manually​

AUTO​ start automatically, when ready​

CARD_TRIG​preset number of cardiac triggers was reached​

RESP_TRIG​preset number of respiratory triggers was reached​

C.8.22.2.1.2 Acquisition Termination Condition​

Acquisition Termination Condition (0018,0071) is the method of acquisition termination that has actually applied to the data collection.​

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Defined Terms:​

CNTS​ preset counts was reached​

DENS​ preset count density (counts/sec) was reached​

RDD​ preset relative count density difference (change in counts/sec) was reached​

MANU​ acquisition was terminated manually​

OVFL​ data overflow occurred​

TIME​ preset time limit was reached​

CARD_TRIG​preset number of cardiac triggers was reached​

RESP_TRIG​preset number of respiratory triggers was reached​

C.8.22.2.1.3 Energy Window Range Sequence​

MultipleenergywindowsareallowedinordertoallowcoincidenceeventsbasedonadditionalEnergyWindows(e.g.,Comptonevents​ scattered in the detector). All energy windows are assumed to contribute to all frames in this image.​

C.8.22.3 Enhanced PET Image Module​

Table C.8.22-3 specifies the Attributes of the Enhanced PET Image Module.​

Table C.8.22-3. Enhanced PET Image Module Attributes​

RequiredifImageType(0008,0008)Value1ofthisframeisORIGINAL​ and SOP Class UID is not "1.2.840.10008.5.1.4.1.1.128.1" (Legacy​ Converted), may be present otherwise.​

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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. For such​ Items the SOP Class UID would be​ "1.2.840.10008.5.1.4.1.1.66"(RawDataSOPClass)andthe​ SOP Instance UID would be any appropriate UID.​

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

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See Section C.7.6.1.1.5.2.​

Required if Lossy Image Compression (0028,2110) is "01".​

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C.8.22.3.1 Enhanced PET Image Description Attribute Description​

C.8.22.3.1.1 Image Type and Frame Type​

The Image Type Attribute (0008,0008) and Frame Type (0008,9007) identifies important image characteristics in a multiple valued​ Data Element. In addition to the requirements specified in Section C.8.16.1 Image Type and Frame Type, the following additional​ requirements and Defined Terms are specified:​

C.8.22.3.1.1.1 Pixel Data Characteristics​

Value 1 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.1. No additional requirements or​ Defined Terms.​

C.8.22.3.1.1.2 Patient Examination Characteristics​

Value 2 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.2. No additional requirements or​ Defined Terms.​

C.8.22.3.1.1.3 Image Flavor​

Value 3 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.3. No additional requirements or​ Defined Terms.​

C.8.22.3.1.1.4 Derived Pixel Contrast​

Value 4 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.4. No additional requirements or​ Defined Terms.​

C.8.22.3.1.2 Attenuation Correction Source​

The Attribute Attenuation Correction Source (0018,9738) contains the source of the attenuation map information used for attenuation​ correction.​

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