Abstract
In this study, the performance of sequence tracking methods for multiple interaction events in specific CdZnTe Compton imagers was evaluated using Monte Carlo simulations. The Compton imager consisted of a 6 × 6 array of virtual Frisch-grid CZT crystals, where the dimensions of each crystal were 5 × 5 × 12 mm3. The sequence tracking methods for another Compton imager that consists of two identical CZT crystals arrays were also evaluated. When 662 keV radiation was incident on the detectors, the percentages of the correct sequences determined by the simple comparison and deterministic methods for two sequential interactions were identical (~80%), while those evaluated using the minimum squared difference method (55–59%) and Three Compton method (45–55%) for three sequential interactions, differed from each other. The reconstructed images of a 662 keV point source detected using single and double arrays were evaluated based on their angular resolution and signal-to-noise ratio, and the results showed that the double arrays outperformed single arrays.
Original language | English |
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Pages (from-to) | 4080-4092 |
Number of pages | 13 |
Journal | Nuclear Engineering and Technology |
Volume | 53 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2021 Dec |
Bibliographical note
Funding Information:This work was supported by the Nuclear Safety Research Program through the Korea Foundation Of Nuclear Safety (KoFONS) using the financial grant funded by the Nuclear Safety and Security Commission (NSSC) of the Republic of Korea (No. 1903006 ), the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIT ) (No. 2020R1A2C1005924 ) and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (No. 20214000000070 , Promoting of expert for energy industry advancement in the field of radiation technology).
Publisher Copyright:
© 2021 Korean Nuclear Society
Keywords
- CZT detector
- Compton camera
- Multiple interaction events
- Sequence tracking method
ASJC Scopus subject areas
- Nuclear Energy and Engineering