Title :
A portable gamma camera for radiation monitoring
Author :
Guru, S.V. ; He, Z. ; Wehe, D.K. ; Knoll, G.F.
Author_Institution :
Dept. of Nucl. Eng., Michigan Univ., Ann Arbor, MI, USA
fDate :
30 Oct-5 Nov 1994
Abstract :
A compact gamma camera capable of imaging high energy gamma rays (up to 2 MeV) is currently being developed. This camera uses a three inch square Position Sensitive Photomultiplier Tube (PSPMT) [Hamamatsu, R-2487-05] coupled to a NaI(Tl) scintillator. The incoming gamma ray direction is determined by a segmented collimator. The camera exhibits energy resolutions of 17% FWHM at 122 keV and 12% FWHM at 662 keV. A spatial resolution of 3 mm is achieved at the center of the tube. Images have been obtained using gamma ray sources up to 1 MeV in energy using this system. The image reconstruction technique used here is presented in detail. Corrections for the non-uniformities across the face of the PSPMT are implemented to improve the spatial and spectral information content in the final image
Keywords :
gamma-ray detection; image reconstruction; photomultipliers; position sensitive particle detectors; radiation monitoring; solid scintillation detectors; NaI(Tl) scintillator; PSPMT; compact gamma camera; energy resolutions; high energy gamma ray imaging; image reconstruction; incoming gamma ray direction; nonuniformities; portable gamma camera; radiation monitoring; segmented collimator; spatial information; spatial resolution; spectral information; three inch square Position Sensitive Photomultiplier Tube; Cameras; Collimators; Energy resolution; Gamma rays; High-resolution imaging; Image segmentation; Optical imaging; Photomultipliers; Radiation monitoring; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474360
