DocumentCode :
438634
Title :
Simulation study of patient and crystal scatter in 3D PET for various crystals
Author :
Staelens, S. ; Vandenberghe, S. ; Glick, S.J. ; Asseler, Y.D. ; Lemahieu, I. ; Van de Walle, R.
Author_Institution :
ELIS Dept., Ghent Univ., Belgium
Volume :
6
fYear :
2004
fDate :
16-22 Oct. 2004
Firstpage :
3574
Abstract :
The main objective of this study is to understand by means of simulations which patient scatter order is significantly predominating in the photopeak window. A second goal was to qualify the difference between phantom and crystal scatter influences. Since this is dependent of the photoelectric fraction (ratio of the number of detections in the photopeak window after photo-electric effect to the total of the photopeak detections including multiple Compton and photo-electric events), several crystal materials were investigated: GSO, LSO, BGO. We also included two innovative materials: LaBr3 and LUI3. Simulation studies showed that only first order patient scatter is significantly degrading PET image quality. The effect of higher order scatter in the photopeak window is negligible. For crystal scatter we propose to realistically simulate the generalized natural pixel matrix in order to incorporate the aforementioned degrading factor. It was shown that this improves the image resolution.
Keywords :
bismuth compounds; gadolinium compounds; gamma-ray detection; image reconstruction; lanthanum compounds; lutetium compounds; medical image processing; phantoms; photoelectricity; positron emission tomography; solid scintillation detectors; 3D PET; crystal scatter; image quality; image reconstruction; patient scatter order; phantom; photoelectric fraction; photopeak window; Crystalline materials; Crystals; Event detection; Helium; Imaging phantoms; Medical simulation; National electric code; Nuclear medicine; Positron emission tomography; Scattering;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
ISSN :
1082-3654
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
Type :
conf
DOI :
10.1109/NSSMIC.2004.1466657
Filename :
1466657
Link To Document :
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