Portable high energy gamma ray imagers

Autor: R. Redus, Zhong He, S.V. Guru, David K. Wehe, M.R Squillante, Glenn F. Knoll
Rok vydání: 1996
Předmět:
Zdroj: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 378:612-619
ISSN: 0168-9002
DOI: 10.1016/0168-9002(96)00265-3
Popis: To satisfy the needs of high energy gamma ray imagers for industrial nuclear imaging applications, three high energy gamma cameras are presented. The RMD-Pinhole camera uses a lead pinhole collimator and a segmented BGO detector viewed by a 3 in. square position sensitive photomultiplier tube (PSPMT). This pinhole gamma camera displayed an energy resolution of 25.0% FWHM at the center of the camera at 662 keV and an angular resolution of 6.2° FWHM at 412 keV. The fixed multiple hole collimated camera (FMCC), used a multiple hole collimator and a continuous slab of NaI(Tl) detector viewed by the same PSPMT. The FMCC displayed an energy resolution of 12.4% FWHM at 662 keV at the center of the camera and an angular resolution of 6.0° FWHM at 412 keV. The rotating multiple hole collimated camera (RMCC) used a 180° antisymmetric rotation modulation collimator and CsI(Tl) detectors coupled to PIN silicon photodiodes. The RMCC displayed an energy resolution of 7.1% FWHM at 662 keV and an angular resolution of 4.0° FWHM at 810 keV. The performance of these imagers is discussed in this paper.
Databáze: OpenAIRE