Improvement of the imaging resolution for a Compton camera by determination of the interaction depth in a 25-segmented germanium detector
- Authors
- Jung, Hyo Soon; Lee, Ju Hahn; Kwon, Young Kwan; Seo, Hee; Kim, Chan Hyeong; Lee, Chun Sik
- Issue Date
- Oct-2007
- Publisher
- IEEE
- Citation
- IEEE Nuclear Science Symposium Conference Record, v.6, pp.4364 - 4366
- Indexed
- SCOPUS
- Journal Title
- IEEE Nuclear Science Symposium Conference Record
- Volume
- 6
- Start Page
- 4364
- End Page
- 4366
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/179452
- DOI
- 10.1109/NSSMIC.2007.4437080
- ISSN
- 1095-7863
- Abstract
- The imaging resolution in a Compton camera depends mainly on the position uncertainty, which is affected by the size of electrodes in a detector. Therefore, if any other method is not used for the reduction of the position uncertainty, the imaging resolution is limited by the size of electrodes. Recently, we have developed a Compton camera consisting of a double-sided silicon strip detector (DSSD) and a 25-segmented germanium detector (25-SEGD). The 25-SEGD has an active volume of 5 × 5 × 2 cm3. We have performed measurement for determination of the interaction depth in the 25-SEGD using the pulse shape analysis. After getting a rise-time correlation between the anode and the segment, we obtained a relation formula between the rise-time of the detector signal and the depth derived from the decay equation of gamma-ray in the detector. This decay formula has been used for the determination of interaction depth. As a result of applying the relation function to image reconstruction, we could improve the imaging resolution.
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