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 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 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 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 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 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.

Defined Terms:

CT

MR

POSITRON SOURCE

SINGLE PHOTON

CALCULATED Emission data is used to calculate the correction map.

C.8.22.3.1.3 Attenuation Correction Temporal Relationship

The attribute Attenuation Correction Temporal Relationship (0018,9770)specifies the temporal relationship between the attenuation correction source image and the PET image data.

Defined Terms:

CONCURRENT The attenuation correction source image is acquired at approximately the same time and with the patient in the same body position as the PET image. For example, as acquired on a hybrid scanner.

SEPARATE The attenuation correction source image is acquired at a different time, on a different system, or the patient has been moved significantly enough to cause soft tissue movement. For example, an attenuation correction source image acquired on a separate CT scanner, so that the patient must move from one bed to another.

SIMULTANEOUS The attenuation correction source image is acquired at the same time and with the patient in the same body position as the PET image.