Nuclear Engineering and Technology

  • 제53권9호
  • /
  • Pages.3018-3025
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  • 2021
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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A feasibility study of using a 3D-printed tumor model scintillator to verify the energy absorbed to a tumor

  • Kim, Tae Hoon (Department of Nuclear Engineering, Hanyang University College of Engineering) ;
  • Lee, Sangmin (Department of Nuclear Engineering, Hanyang University College of Engineering) ;
  • Kim, Dong Geon (Department of Nuclear Engineering, Hanyang University College of Engineering) ;
  • Jeong, Jae Young (Department of Nuclear Engineering, Hanyang University College of Engineering) ;
  • Yang, Hye Jeong (Department of Biomedicine and Health Sciences & Biomedical Engineering, Catholic University College of Medicine) ;
  • Schaarschmidt, Thomas (Department of Biomedicine and Health Sciences & Biomedical Engineering, Catholic University College of Medicine) ;
  • Choi, Sang Hyoun (Research Team of Radiological Physics and Engineering, Korea Institute of Radiological & Medical Science) ;
  • Cho, Gyu-Seok (Research Team of Radiological Physics and Engineering, Korea Institute of Radiological & Medical Science) ;
  • Kim, Yong Kyun (Department of Nuclear Engineering, Hanyang University College of Engineering) ;
  • Chung, Hyun-Tai (Department of Neurosurgery, Seoul National University College of Medicine)
  • 투고 : 2020.08.14
  • 심사 : 2021.03.31
  • 발행 : 2021.09.25
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초록

The authors developed a volumetric dosimetry detector system using in-house 3D-printable plastic scintillator resins. Three tumor model scintillators (TMSs) were developed using magnetic resonance images of a tumor. The detector system consisted of a TMS, an optical fiber, a photomultiplier tube, and an electrometer. The background signal, including the Cherenkov lights generated in the optical fiber, was subtracted from the output signal. The system showed 2.1% instability when the TMS was reassembled. The system efficiencies in collecting lights for a given absorbed energy were determined by calibration at a secondary standard dosimetry laboratory (kSSDL) or by calibration using Monte Carlo simulations (ksim). The TMSs were irradiated in a Gamma Knife® IconTM (Elekta AB, Stockholm, Sweden) following a treatment plan. The energies absorbed to the TMSs were measured and compared with a calculated value. While the measured energy determined with kSSDL was (5.84 ± 3.56) % lower than the calculated value, the energy with ksim was (2.00 ± 0.76) % higher. Although the TMS detector system worked reasonably well in measuring the absorbed energy to a tumor, further improvements in the calibration procedure and system stability are needed for the system to be accepted as a quality assurance tool.

키워드

과제정보

This study was supported by the Ministry of Science and ICT (grant numbers NRF-2016M2A2A6A03946564 and NRF-2020R1F1A1061144).

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