AbstractID: 9927 Title: Practical Aspects of PET Accreditation
The PET Phantom accreditation data are acquired with the ACR PET phantom. The
phantom is relatively easy to fill and set up for a PET study and can be used to measure
tomographic uniformity, spatial resolution, and the detectability of “hot” lesions. The
variety of resolution and “hot” components enables thereviewers to see relatively subtle
differences in system performance.
The accreditation phantom images are submitted to a review panel of qualified medical
physicists for scoring. The Nuclear Medicine Accreditation Committee has defined
acceptable standards for uniformity, spatial resolution and lesion detection.
Uniformity and noise are evaluated qualitatively by inspection of reconstructed
tomographic sections. Optimal density ranges should be comparable to those used for
clinical images.Spatial resolution is judged by identifying thesmallest “cold” rods in the
phantom and lesion detectability is determined from the “hot” cylinders. The same
protocol is also used for the “cold” cylinders that demonstrate the effectiveness of the
attenuation and scatter corrections.
Educational Objectives:
Be aware of the ACR PET accreditation process and PET
Physicist Qualifications. 2) Understand the ACR PET Phantom
and testing required for ACR accreditation. 3) Understand
how phantom images are reviewed by the ACR. 4) Be able to
activate the ACR Phantom. 5) Understand phantom image
acquisition and processing. 6) Understand PET phantom image
contrast, resolution, and uniformity.