Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Assesment of Absorbed Dose of Organs in Human Body by Cone Beam Computed Tomography using Monte Carlo Method

몬테칼로 기법을 이용한 CBCT의 인체 내 장기의 흡수선량 평가

  • Kim, Jong-Bo (Department of Radiation Oncology, Dongnam Ins. of Radiological & Medical Science) ;
  • Im, In-Chul (Department of Radiological Science, Dongeui University) ;
  • Park, Eun-Tae (Department of Radiation Oncology, Inje University Busan Paik Hospital)
  • 김종보 (동남권원자력의학원 방사선종양학과) ;
  • 임인철 (동의대학교 방사선학과) ;
  • 박은태 (인제대학교 부산백병원 방사선종양학과)
  • Received : 2018.04.06
  • Accepted : 2018.06.05
  • Published : 2018.06.30
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Abstract

Cone beam Computed Tomography(CBCT) is an increasing trend in clinical applications due to its ability to increase the accuracy of radiation therapy. However, this leaded to an increase in exposure dose. In this study, the simulation using Monte Carlo method is performed and the absorbed dose of CBCT is analyzed and standardized data is presented. First, after simulating the CBCT, the photon spectrum was analyzed to secure the reliability and the absorbed dose of the tissue in the human body was evaluated using the MIRD phantom. Compared with SRS-78, the photon spectrum of CBCT showed similar tendency, and the average absorbed dose of MIRD phantom was 8.12 ~ 25.88 mGy depending on the body site. This is about 1% of prescription dose, but dose management will be needed to minimize patient side effects and normal tissue damage.

Keywords

References

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