Study on the Imaging Resolution of a Multiply-stacked Compton Camera

被引:1
作者
Kim, N. Y. [1 ]
Lee, J. H. [1 ]
Lee, C. S. [1 ]
机构
[1] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea
关键词
Compton camera; Double-sided silicon strip detector; GEANT4; Compton scattering; Image resolution; GAMMA-CAMERA; PERFORMANCE; TELESCOPE;
D O I
10.3938/jkps.55.1409
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have investigated the effect of detector parameters, such as the energy and the position resolution, on the imaging resolution and sensitivity of a multiply-stacked Compton camera by using the proof-of-principle system and the GEANT4 simulation toolkit, including Doppler broadening. The multiply-stacked Compton camera consisted of three double-sided silicon strip detectors. The proof-of-principle system shows that the three-Compton method can reconstruct the incident gamma-ray energy distributions and that it helps to illustrate the usefulness of the three-Compton method when gamma rays don't stop completely. Reconstructed images and spectra from a Cs-137 gamma-ray source have been obtained by using an event reconstruction algorithm. The reconstructed gamma-ray energy shows a photopeak of 661.7 keV for Cs-137 at 607.5 keV and has a 149.8-keV FWHM. GEANT4 simulation results show the feasibility of using the proof-of-principle system in the energy range from 661.7 keV to 1400.0 keV. The image resolution was significantly affected by the position resolution of the multiply-stacked Compton camera rather than by the energy resolution of the detector.
引用
收藏
页码:1409 / 1415
页数:7
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