li miao, xiao shali, zhang liuqiang, et al. Gamma source imaging based on pixellated CdZnTe detection[J]. High Power Laser and Particle Beams, 2010, 22.
Citation:
li miao, xiao shali, zhang liuqiang, et al. Gamma source imaging based on pixellated CdZnTe detection[J]. High Power Laser and Particle Beams, 2010, 22.
li miao, xiao shali, zhang liuqiang, et al. Gamma source imaging based on pixellated CdZnTe detection[J]. High Power Laser and Particle Beams, 2010, 22.
Citation:
li miao, xiao shali, zhang liuqiang, et al. Gamma source imaging based on pixellated CdZnTe detection[J]. High Power Laser and Particle Beams, 2010, 22.
A gamma source pinhole imaging system with direct imaging mode pixellated CdZnTe detector has been constructed based on the principle of pinhole imaging. The energy resolution and peak efficiency of CdZnTe pixellated detector were tested and analyzed. During the preliminary experiments, modulation transfer function (MTF) and additional noise characteristic of pinhole imaging system were investigated and discussed. This paper presents and evaluates the test images of a 0.5 mm diameter 137Cs gamma source. The measured pinhole images are restored with the Lucy-Richardson algorithm. The energy resolution of the CdZnTe pixellated detector system for 662 keV 137Cs are 6.25%～7.50% and photon peak efficiency are 65.0%～72.5%. There is lateral spread information in the source
DownLoad: