Nuclear Engineering and Technology

  • 제51권5호
  • /
  • Pages.1406-1416
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  • 2019
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Multi-slit prompt-gamma camera for locating of distal dose falloff in proton therapy

  • Park, Jong Hoon (Department of Nuclear Engineering, Hanyang University) ;
  • Kim, Sung Hun (Department of Nuclear Engineering, Hanyang University) ;
  • Ku, Youngmo (Department of Nuclear Engineering, Hanyang University) ;
  • Kim, Chan Hyeong (Department of Nuclear Engineering, Hanyang University) ;
  • Lee, Han Rim (Neutron Utilization Technology Division, Korea Atomic Energy Research Institute) ;
  • Jeong, Jong Hwi (Proton Therapy Center, National Cancer Center) ;
  • Lee, Se Byeong (Proton Therapy Center, National Cancer Center) ;
  • Shin, Dong Ho (IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute)
  • 투고 : 2018.09.18
  • 심사 : 2019.03.11
  • 발행 : 2019.06.25
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초록

In this research, a multi-slit prompt-gamma camera was developed to locate the distal dose falloff of the proton beam spots in spot scanning proton therapy. To see the performance of the developed camera, therapeutic proton beams were delivered to a solid plate phantom and then the prompt gammas from the phantom were measured using the camera. Our results show that the camera locates the 90% distal dose falloff (= d90%), within about 2-3 mm of error for the spots which are composed $3.8{\times}10^8$ protons or more. The measured location of d90% is not very sensitive to the irradiation depth of the proton beam (i.e., the depth of proton beam from the phantom surface toward which the camera is located). Considering the number of protons per spot for the most distal spots in typical treatment cases (i.e., 2 Gy dose divided in 2 fields), the camera can locate d90% only for a fraction of the spots depending on the treatment cases. However, the information of those spots is still valuable in that, in the multi-slit prompt-gamma camera, the distal dose falloff of the spots is located solely based on prompt gamma measurement, i.e., not referring to Monte Carlo simulation.

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참고문헌

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피인용 문헌

  1. Prompt gamma imaging in proton therapy - status, challenges and developments vol.1561, 2019, https://doi.org/10.1088/1742-6596/1561/1/012021