Title :
Photon depth of interaction in various scintillation crystals and its influence on PET image spatial resolution
Author :
Sanchez-Crespo, A. ; Persson, L. ; Jonsson, C. ; Larsson, S.A.
Author_Institution :
Dept. of Nucl. Medicine, Karolinska Hosp., Stockholm, Sweden
Abstract :
In a PET imaging system, the annihilation photon depth of interaction (DOI) in the scintillator introduces a detection parallax error that contributes to image blurring. Its contribution on the image spatial resolution was theoretically investigated by Monte Carlo calculations of the three dimensional photon transport within a given scintillator (BGO, LSO, LuAP, GSO, NaI) and for a given PET detector geometry in both 2D and 3D registration mode. In addition the uncertainty due to the emission photon non-colinearity (NC) was also included in the calculation.
Keywords :
Monte Carlo methods; image resolution; medical image processing; photon transport theory; positron emission tomography; solid scintillation detectors; BGO; GSO; LSO; LuAP; Monte Carlo calculations; NaI; PET image; image spatial resolution; photon depth; scintillation crystals; scintillator; three dimensional photon transport; Cameras; Geometry; Hospitals; Monte Carlo methods; Nuclear medicine; Photonic crystals; Positron emission tomography; Solid scintillation detectors; Spatial resolution; Telephony;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
DOI :
10.1109/NSSMIC.2004.1462782
