Title :
An evaluation of post-injection transmission measurement in PET
Author :
Turkington, Timothy G. ; Coleman, R. Edward ; Schubert, Scott F. ; Ganin, Alex
Author_Institution :
Dept. of Radiol., Duke Univ. Med. Center, Durham, NC, USA
fDate :
31 Oct-6 Nov 1993
Abstract :
PET transmission scanning in the presence of emission activity has been investigated on two scanners with orbiting pin transmission sources. One phantom consisting of varying sized spherical inserts in a uniform background and another containing simulated lungs, spine, and cardiac insert and uniform background were imaged at various emission activity levels. Insert radioactivity concentration levels varied up to 3.5 μCi/mL. Transmission acquisitions were performed with the phantoms aligned with the emission scan position, and with the phantoms shifted to simulate patient motion between scans. Images were reconstructed with and without compensation for the emission contamination. Qualitative and quantitative evaluation of the resulting image sets was performed. The emission correction resulted in no visible artifacts and ~3% quantitative accuracy
Keywords :
biomedical measurement; positron emission tomography; PET transmission scanning; artifacts; cardiac insert; diagnostic nuclear medicine; medical diagnostic imaging; orbiting pin transmission sources; patient motion simulation; post-injection transmission measurement; quantitative accuracy; radioactivity concentration levels; simulated lungs; spine; uniform background; varying sized spherical inserts; Attenuation measurement; Biomedical imaging; Contamination; Extraterrestrial measurements; Imaging phantoms; Performance evaluation; Pollution measurement; Positron emission tomography; Rotation measurement; Time measurement;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1993., 1993 IEEE Conference Record.
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1487-5
DOI :
10.1109/NSSMIC.1993.373524
