Title :
An analysis of correction methods for emission contamination in PET post-injection transmission measurement
Author :
Luk, W.K. ; Digby, W.D. ; Casey, M.E.
Author_Institution :
CTI PET Syst. Inc., Knoxville, TN, USA
fDate :
30 Oct-5 Nov 1994
Abstract :
The authors have evaluated and compared three techniques for estimation of emission contamination in PET post-injection transmission scans (PITSs). For PET scanners with electronic windowing of events that intersect the transmission source locations, the emission contamination can be estimated by: (1) the emission data taken either before or after the transmission scan, using a sinogram window mask to correct for the rod position and window width; (2) the emission data taken concurrently with the transmission data and a similar sinogram window mask; (3) utilizing a windowed transmission scan with cold rods, or “mock” scan. These techniques have been evaluated with phantom experiments to simulate a wide range of residual activities and object sizes
Keywords :
biomedical measurement; medical image processing; positron emission tomography; cold rods; electronic windowing; emission contamination correction methods; medical diagnostic imaging; mock scan; nuclear medicine; object size; residual activity; rod position; sinogram window mask; transmission source locations intersection; window width; Attenuation; Contamination; Data acquisition; Imaging phantoms; Oncology; Pollution measurement; Position measurement; Positron emission tomography; Time measurement; Whole-body PET;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474750
