Nuclear Engineering and Technology

  • 제54권7호
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  • Pages.2592-2598
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  • 2022
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Optimized TOF-PET detector using scintillation crystal array for brain imaging

  • Leem, Hyuntae (Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University) ;
  • Choi, Yong (Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University) ;
  • Jung, Jiwoong (Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University) ;
  • Park, Kuntai (Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University) ;
  • Kim, Yeonkyeong (Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University) ;
  • Jung, Jin Ho (Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University)
  • 투고 : 2021.07.26
  • 심사 : 2022.02.09
  • 발행 : 2022.07.25
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초록

Research groups in the field of PET instrumentation are studying time-of-flight(TOF) technology to improve the signal-to-noise ratio of PET images. Scintillation light transport and collection plays an important role in improving the coincidence resolving time(CRT) of PET detector based on a pixelated crystal array. Four crystal arrays were designed by the different optical reflection configuration such as external reflectors and surface treatment on the CRT and compared with the light output, energy resolution and CRT. The design proposed in the study was composed of 8 × 8 LYSO crystal array consisted of 3 × 3 × 15 mm3 pixels. The entrance side was roughened while the other five surfaces were polished. Four sides of all crystal pixels were wrapped with ESR-film, and the entrance surface was covered by Teflon-tape. The design provided an excellent timing resolution of 210 ps and improved the CRT by 16% compared to the conventional method using a polishing treatment and ESR-film. This study provided a method for improving the light output and CRT of a pixelated scintillation crystal-based brain TOF PET detector. The proposed configuration might be an attractive detector design for TOF brain PET requiring fast timing performance with high cost-effectiveness.

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과제정보

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2019R1I1A1A01041347) and by the Technology development Program (No. S2840619) funded by the Ministry of SMEs and Startups(MSS, Korea) and by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: KMDF_PR_20200901_0006).

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