DocumentCode :
2349289
Title :
Monte Carlo simulation of high count rate scintillation camera imaging
Author :
Ljungberg, Michael ; Strand, Sven-Erik ; Englund, Jan-Eric ; RootZen, Holger ; Tagesson, Magnus
Author_Institution :
Dept. of Radiat. Phys., Lund Univ. Hospital, Sweden
Volume :
4
fYear :
1994
fDate :
30 Oct-5 Nov 1994
Firstpage :
1682
Abstract :
High activities i.e. photon fluence rates affect the image quality and activity quantitation by introducing misspositioning, pileup and count losses in the system. Monte Carlo simulations can effectively be used to evaluate these effects. Simulated energy spectra are in good agreement with measured data The scatter in the photopeak image have been separated into components and results show a significant increase in scatter-to-total ratio when pulse-tail pileup rejection is applied. The count rate effect on scatter obtained from three multiple-window methods have been compared with true scatter in the photopeak window. Results show that deviation in predicted scatter occur at high count rates. More work needs to be done to in detail model the pileup effects in the scintillation cameras
Keywords :
Monte Carlo methods; biomedical equipment; single photon emission computed tomography; solid scintillation detectors; Monte Carlo simulation; SPECT system; activity quantitation; count losses; count rate effect; high activities; high count rate scintillation camera imaging; image quality; misspositioning; multiple-window methods; photon fluence rates; photopeak image scatter; pileup; pulse-tail pileup rejection; scatter-to-total ratio; simulated energy spectra; Cameras; Computational modeling; Electromagnetic scattering; Image quality; Light scattering; Medical treatment; Particle scattering; Photonic crystals; Protocols; Statistics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
Type :
conf
DOI :
10.1109/NSSMIC.1994.474740
Filename :
474740
Link To Document :
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