Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
권호 표지

Determination of Dose Distribution under Nonequivalent Condition by Prosthesis in Radiotherapy

방사선 치료시 인공고관절 삽입에 의한 불균질면에서의 선량분포 평가

  • Lee, Joon-Il (Dept. of Radiologic Technology, Taegu Health College) ;
  • Kim, Sung-Hwan (Dept. of Radiologic Technology, Taegu Health College)
  • 이준일 (대구보건대학 방사선과) ;
  • 김성환 (대구보건대학 방사선과)
  • Published : 1998.12.30
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Abstract

When a patient was irradiated with prosthetic hip, the dose distribution was changed according to inhomogeneous materials. The density, effective atomic number, and the composition of material had influence on absorbed dose distribution. In this study, the influence of inhomogeneous material(Ti) was measured using a polyethylene phantom, which consisted of various diameter of titanium, with film dosimetry. As a result, the backward dose showed 29.5% increas by backscattering, the forward dose showed 28% decreas by absorption, and the side dose showed 7% increas by scattering, when 25 mm diameter Ti was used. In addition forward dose was in inverse proportion to the thickness of prosthetic material. When the prosthetic hip of patient is in an irradiated field, we must carefully study the absorbed dose distribution.

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