Title :
Effect of depth of interaction decoding on resolution in PET: a simulation study
Author :
Astakhov, V. ; Gumplinger, P. ; Moisan, C. ; Ruth, T.J. ; Sossi, V.
Author_Institution :
British Columbia Univ., Vancouver, BC, Canada
Abstract :
Information about the γ depth of interaction (DOI) in the crystal can help to improve the resolution uniformity in positron emission tomography cameras by reducing the blurring due to the parallax error. The parallax error is particularly severe for tomographs with small detector-to-detector distance, which is by itself a desirable feature, since it maximizes the detection solid angle and thus sensitivity. In this study we have developed simulations to determine the effect of a particular DOI correction method on resolution for some tomograph and crystal geometries. For specific configurations examined DOI correction was found to improve the resolution uniformity up to 37%.
Keywords :
medical image processing; positron emission tomography; crystal geometries; gamma depth of interaction; parallax error; positron emission tomography cameras; resolution uniformity; tomograph geometries; Cameras; Crystalline materials; Decoding; Event detection; Geometry; Photonic crystals; Positron emission tomography; Shape; Solid modeling; Solid scintillation detectors;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2002 IEEE
Print_ISBN :
0-7803-7636-6
DOI :
10.1109/NSSMIC.2002.1239484
