DocumentCode :
2910675
Title :
Attenuation correction with low activity sources
Author :
Wainer, N. ; Bouhnik, J.P. ; Wilk, M. ; Chouraqui, P.
Author_Institution :
Elgems Res. & Dev., Israel
Volume :
3
fYear :
1998
fDate :
1998
Firstpage :
1813
Abstract :
The aim of this study was to test the influence of the source decay on the performance of the attenuation-corrected (AC) thallium-201 ((201)Tl) single photon emission tomography using a gadolinium-153 (153Gd) line source. Three acquisitions were performed using the same line source during a period of 26 months. The activity of the source was 300 mCi for the first acquisition and 30 mCi for the last one. For each phantom acquisition AC and NC (non-corrected) 201Tl SPECT was performed. AC and NC images were evaluated by a 31-segment semiquantitative analysis. Comparisons between the circumferential count density profiles of the AC and NC segmented polar map were done. Evident degradation in the AC performance was demonstrated for line source activity lower then 60 mCi. From noise propagation the authors estimated that source activity higher then 300 mCi would give poor improvement in the AC performance
Keywords :
gamma-ray absorption; medical image processing; radioactive sources; single photon emission computed tomography; 0.03 Ci; 0.06 Ci; 0.3 Ci; 26 month; Gd; SPECT; Tl; attenuation correction; circumferential count density profiles; image artefacts; line source activity; low activity sources; noise propagation; nuclear medicine; phantom acquisition; Attenuation; Cameras; Collimators; Detectors; Image reconstruction; Image segmentation; Imaging phantoms; Magnetic heads; Myocardium; Single photon emission computed tomography;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE
Conference_Location :
Toronto, Ont.
ISSN :
1082-3654
Print_ISBN :
0-7803-5021-9
Type :
conf
DOI :
10.1109/NSSMIC.1998.773889
Filename :
773889
Link To Document :
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