A.21 Positron Emission Tomography Image Information Object Definition

A.21.1 PET Image IOD Description

The Positron Emission Tomography (PET) Image Information Object Definition specifies an image that has been created by a Positron Tomograph imaging device, including dedicated PET cameras and Nuclear Medicine imaging devices operating in coincidence mode. This includes data created by external detection devices that create images of the distribution of administered radioactive materials, specifically positron emitters, in the body. Depending on the specific radiopharmaceuticals administered and the particular imaging procedure performed, problems involving changes in metabolism, function, or physiology can be investigated and various region pathologies can be studied. For these problems, quantitation of image data in absolute activity and physiological units is important. In addition, the PET Image IOD specifies attenuation (transmission) images used for correction and anatomical reference of emission images.

A.21.2 PET Image IOD Entity-Relationship Model

The E-R model in Section A.1.2 of this part depicts those components of the DICOM Information Model that directly reference the PET Image IOD. The overlay IE, modality LUT IE, VOI LUT IE, and curve IE are not components of the PET Image IOD.

A.21.3 PET Image IOD Module Table

Table A.21.3-1 - PET IMAGE IOD MODULES

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
PET Series C.8.9.1 M
PET Isotope C.8.9.2 M
PET Multi-gated Acquisition C.8.9.3 C - Required if Series Type (0054,1000) Value 1 is GATED.
NM/PET Patient Orientation C.8.4.6 M
Frame of Reference Frame of Reference C.7.4.1 M
Equipment General Equipment C.7.5.1 M
Image General Image C.7.6.1 M
Image Plane C.7.6.2 M
Image Pixel C.7.6.3 M
Device C.7.6.12 U
Specimen C.7.6.22 U
PET Image C.8.9.4 M
Overlay Plane C.9.2 U
VOI LUT C.11.2 U
Acquisition Context C.7.6.14 U
SOP Common C.12.1 M

A.21.3.1 Acquisition Context Module

The Defined Template for Acquisition Context Sequence (0040,0555) is TID 3470.