Study on the Imaging Resolution of a Multiply-stacked Compton Camera
- Authors
- Kim, N. Y.; Lee, J. H.; Lee, C. S.
- Issue Date
- Oct-2009
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Compton camera; Double-sided silicon strip detector; GEANT4; Compton scattering; Image resolution
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.55, no.4, pp 1409 - 1415
- Pages
- 7
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 55
- Number
- 4
- Start Page
- 1409
- End Page
- 1415
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/22974
- DOI
- 10.3938/jkps.55.1409
- ISSN
- 0374-4884
1976-8524
- Abstract
- 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.
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