Development and performance evaluation of large-area hybrid gamma imager (LAHGI)
We report the development of a gamma-ray imaging device, named Large-Area Hybrid Gamma Imager (LAHGI), featuring high imaging sensitivity and good imaging resolution over a broad energy range. A hybrid collimation method, which combines mechanical and electronic collimation, is employed for a stable...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573321000577 |
| _version_ | 1818456339658047488 |
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| author | Hyun Su Lee Jae Hyeon Kim Junyoung Lee Chan Hyeong Kim |
| author_facet | Hyun Su Lee Jae Hyeon Kim Junyoung Lee Chan Hyeong Kim |
| author_sort | Hyun Su Lee |
| collection | DOAJ |
| description | We report the development of a gamma-ray imaging device, named Large-Area Hybrid Gamma Imager (LAHGI), featuring high imaging sensitivity and good imaging resolution over a broad energy range. A hybrid collimation method, which combines mechanical and electronic collimation, is employed for a stable imaging performance based on large-area scintillation detectors for high imaging sensitivity. The system comprises two monolithic position-sensitive NaI(Tl) scintillation detectors with a crystal area of 27 × 27 cm2 and a tungsten coded aperture mask with a modified uniformly redundant array (MURA) pattern. The performance of the system was evaluated under several source conditions. The system showed good imaging resolution (i.e., 6.0–8.9° FWHM) for the entire energy range of 59.5–1330 keV considered in the present study. It also showed very high imaging sensitivity, successfully imaging a 253 μCi 137Cs source located 15 m away in 1 min; this performance is notable considering that the dose rate at the front surface of the system, due to the existence of the 137Cs source, was only 0.003 μSv/h, which corresponds to ∼3% of the background level. |
| first_indexed | 2024-12-14T22:25:06Z |
| format | Article |
| id | doaj.art-5bfb88eb54784eaf823e98ce00f6c660 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-14T22:25:06Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-5bfb88eb54784eaf823e98ce00f6c6602022-12-21T22:45:23ZengElsevierNuclear Engineering and Technology1738-57332021-08-0153826402645Development and performance evaluation of large-area hybrid gamma imager (LAHGI)Hyun Su Lee0Jae Hyeon Kim1Junyoung Lee2Chan Hyeong Kim3Department of Nuclear Engineering, Hanyang University, Seoul, 04763, Republic of KoreaDepartment of Nuclear Engineering, Hanyang University, Seoul, 04763, Republic of Korea; Radiation Research Division, Korea Atomic Energy Research Institute, Jeongeup, 56212, Republic of KoreaDepartment of Nuclear Engineering, Hanyang University, Seoul, 04763, Republic of KoreaDepartment of Nuclear Engineering, Hanyang University, Seoul, 04763, Republic of Korea; Corresponding author.We report the development of a gamma-ray imaging device, named Large-Area Hybrid Gamma Imager (LAHGI), featuring high imaging sensitivity and good imaging resolution over a broad energy range. A hybrid collimation method, which combines mechanical and electronic collimation, is employed for a stable imaging performance based on large-area scintillation detectors for high imaging sensitivity. The system comprises two monolithic position-sensitive NaI(Tl) scintillation detectors with a crystal area of 27 × 27 cm2 and a tungsten coded aperture mask with a modified uniformly redundant array (MURA) pattern. The performance of the system was evaluated under several source conditions. The system showed good imaging resolution (i.e., 6.0–8.9° FWHM) for the entire energy range of 59.5–1330 keV considered in the present study. It also showed very high imaging sensitivity, successfully imaging a 253 μCi 137Cs source located 15 m away in 1 min; this performance is notable considering that the dose rate at the front surface of the system, due to the existence of the 137Cs source, was only 0.003 μSv/h, which corresponds to ∼3% of the background level.http://www.sciencedirect.com/science/article/pii/S1738573321000577Hybrid imagingCompton imagingCoded aperture imagingScintillation detector |
| spellingShingle | Hyun Su Lee Jae Hyeon Kim Junyoung Lee Chan Hyeong Kim Development and performance evaluation of large-area hybrid gamma imager (LAHGI) Nuclear Engineering and Technology Hybrid imaging Compton imaging Coded aperture imaging Scintillation detector |
| title | Development and performance evaluation of large-area hybrid gamma imager (LAHGI) |
| title_full | Development and performance evaluation of large-area hybrid gamma imager (LAHGI) |
| title_fullStr | Development and performance evaluation of large-area hybrid gamma imager (LAHGI) |
| title_full_unstemmed | Development and performance evaluation of large-area hybrid gamma imager (LAHGI) |
| title_short | Development and performance evaluation of large-area hybrid gamma imager (LAHGI) |
| title_sort | development and performance evaluation of large area hybrid gamma imager lahgi |
| topic | Hybrid imaging Compton imaging Coded aperture imaging Scintillation detector |
| url | http://www.sciencedirect.com/science/article/pii/S1738573321000577 |
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