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.