TY - JOUR
T1 - Evaluation of sequence tracking methods for Compton cameras based on CdZnTe arrays
AU - Lee, Jun
AU - Kim, Younghak
AU - Bolotnikov, Aleksey
AU - Lee, Wonho
N1 - 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
PY - 2021/12
Y1 - 2021/12
N2 - 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.
AB - 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.
KW - CZT detector
KW - Compton camera
KW - Multiple interaction events
KW - Sequence tracking method
UR - http://www.scopus.com/inward/record.url?scp=85109448095&partnerID=8YFLogxK
U2 - 10.1016/j.net.2021.06.027
DO - 10.1016/j.net.2021.06.027
M3 - Article
AN - SCOPUS:85109448095
SN - 1738-5733
VL - 53
SP - 4080
EP - 4092
JO - Nuclear Engineering and Technology
JF - Nuclear Engineering and Technology
IS - 12
ER -