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 :
8/1/1994 12:00:00 AM
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 and spine, a myocardium 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; computerised tomography; radioisotope scanning and imaging; PET transmission scanning; medical diagnostic imaging; myocardium insert; nuclear medicine; patient motion simulation; positron emission tomography; post-injection transmission measurement; simulated lungs; simulated spine; uniform background; varying sized spherical inserts; visible artifacts; Attenuation measurement; Biomedical imaging; Contamination; Extraterrestrial measurements; Imaging phantoms; Performance evaluation; Pollution measurement; Positron emission tomography; Rotation measurement; Time measurement;
Journal_Title :
Nuclear Science, IEEE Transactions on
