DocumentCode :
294076
Title :
Feasibility of using cadmium-zinc-telluride detectors in electronically collimated SPECT
Author :
Singh, M. ; Doty, F.P. ; Friesenhahn, S.J. ; Butler, J.F.
Author_Institution :
Dept. of Radiol., Univ. of Southern California, Los Angeles, CA, USA
Volume :
3
fYear :
1994
fDate :
30 Oct-5 Nov 1994
Firstpage :
1165
Abstract :
Replacing cryogenically cooled germanium (Ge) with room-temperature operable cadmium-zinc-telluride (CZT) semiconducting detectors as the first detector of an electronically collimated SPECT system would have certain practical advantages. To determine the feasibility of this approach, the authors have performed a theoretical study comparing the resolution and sensitivity of a Ge based system to that of a CZT based system. Also, a preliminary experimental study using a 5 mm×5 mm×1.5 mm thick CZT detector as the first detector and an uncollimated scintillation camera as the second detector was conducted to measure the point spread function. The results indicate that the efficiency of a CZT based system would be a factor of 2.5 lower than a comparable Ge based system at 140 keV and the spatial resolution would also be approximately a factor of two worse. However, at higher energies, the difference between CZT and Ge would decrease, and at 662 keV, for example, the CZT and the Ge systems could have nearly equal sensitivity and resolution
Keywords :
biomedical electronics; gamma-ray detection; semiconductor counters; single photon emission computed tomography; 140 keV; 662 keV; Cd-Zn-Te; Ge; cadmium-zinc-telluride detectors; diagnostic nuclear medicine; electronically collimated SPECT; medical instrumentation; point spread function; room-temperature operable detectors; spatial resolution; uncollimated scintillation camera; Cameras; Collimators; Electromagnetic scattering; Energy resolution; Germanium; Particle scattering; Radiation detectors; Semiconductivity; Solid scintillation detectors; Spatial resolution;
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.1994.474638
Filename :
474638
Link To Document :
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