The Journal of Korean Society for Radiation Therapy (대한방사선치료학회지)

Korean Society for Radiation Therapy (대한방사선치료학회)
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The Central Beam Characteristics of 6 MV X-Ray - The PDD and TMR for Siemens Linear Accelerator K.D. -

6MV X-선 선축중심선상에서의 BEAM 특성 - Siemens MEVATRON KD 선형가속기에서 P. D. D와 TMR을 중심으로 -

  • Chung, Chil (Dept. of Radiation Therapy Han Yang Univ. HOSP.) ;
  • Kim, Byong-Wook (Dept. of Radiation Therapy Han Yang Univ. HOSP.)
  • 정칠 (한양대학병원 치료방사선과) ;
  • 김병욱 (한양대학병원 치료방사선과)
  • Published : 1989.05.01
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Abstract

The central beam characteristics of 6 MV X-ray from a Mevatron KD linear Accelerator are examin-depths The PDD (Percent Depth Dose) values and the TMR (Tissue Maximum Ratio) values are evaluated from measurement as a function of the depths and the field sizes. The calculated TMR values from the PDD are compared to those from measurement. The average differences between calculated TMR and measured one are within $1\%$ and we have concluded that calculated TMR values are acceptable for practical use.

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