대한방사선치료학회지 (The Journal of Korean Society for Radiation Therapy)

대한방사선치료학회 (Korean Society for Radiation Therapy)
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치료계획용 콤퓨터를 이용한 부정형 조사면의 선량분포에 관한 실험

An Experimental Dosimetry of Irregularly-Shaped-Field Using Therapeutic Planning Computer

  • 박주선 (카톨릭의과대학 방사선치료실) ;
  • 이귀원 (카톨릭의과대학 방사선치료실) ;
  • 한용문 (카톨릭의과대학 방사선치료실) ;
  • 권형철 (카톨릭의과대학 방사선치료실) ;
  • 윤세철 (카톨릭의과대학 방사선치료실)
  • Park, Joo-Sun (Section of Therapeutic Radiology, Catholic Medical College) ;
  • Lee, Gui-Won (Section of Therapeutic Radiology, Catholic Medical College) ;
  • Han, Yong-Moon (Section of Therapeutic Radiology, Catholic Medical College) ;
  • Kwon, Hyoung-Cheol (Section of Therapeutic Radiology, Catholic Medical College) ;
  • Yoon, Sei-Chul (Section of Therapeutic Radiology, Catholic Medical College)
  • 발행 : 1987.06.01
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초록

The authors have intended to measure intrinsic dose distribution by Farmer dosimeter in irregularly shaped fields such as L, M, T,-shape model in order to determine dose inhomogeneity in those models. We made 2 off-axis points in each model and measured the depth dose at 1.5,5, and 9cm below surface. The results showed $1-3\%$ dose discrepancy between 2 points. We also measured the depth dose by geometric approximation and computer calculation in those models, and came to the conclusion that computer calculation using Clarkson's principle is simpler and the measurements are to the ideal data obtained by the experiment in those three models of irregularly shaped fields than those of geometric approximation method.

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