Title :
Study of cadmium zinc telluride (CZT) radiation detector modules under moderate and long-term variations of temperature and humidity
Author :
Mæhlum, Gunnar ; Dietzel, Knut I. ; Meier, Dirk ; Szawlowski, Marek ; Sundal, Bjørn ; Vandehei, Thor ; Wagenaar, Douglas ; Patt, Bradley E.
Author_Institution :
Gamma Medica-Ideas, Northridge
fDate :
Oct. 26 2007-Nov. 3 2007
Abstract :
A gamma camera, assembled from radiation imaging modules based on cadmium zinc telluride (CZT), has been studied under moderate and long-term variations of temperature (15degC to 40degC) and humidity (10% to 70%). Over one year we acquired energy spectra from radiation sources and we measured the photo-peak position and energy resolution. We observe that the camera remains within the desired performance specifications. We conclude that the CZT sensor material is stable over the temperature and humidity range tested and that the CZT sensors retain their energy resolution of 5.4 keV FWHM at 122 keV and keep the photo-peak position within a margin of plusmn1 keV.
Keywords :
application specific integrated circuits; biomedical electronics; gamma-ray detection; gamma-ray production; nuclear electronics; radioactive sources; semiconductor counters; single photon emission computed tomography; ASIC; SPECT; cadmium zinc telluride radiation detector modules; energy resolution; energy spectra; gamma camera; gamma-ray sources; humidity; photopeak position; radiation imaging modules; radiation sources; temperature 15 C to 41 C; Assembly; Cadmium compounds; Cameras; Energy measurement; Energy resolution; Humidity; Radiation detectors; Radiation imaging; Temperature sensors; Zinc compounds;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0922-8
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2007.4437315
