論文

査読有り
2020年10月

Oblique Surface Dose Calculation in High-Energy X-ray Therapy.

Acta medica Okayama
  • Naomasa Narihiro
  • ,
  • Masataka Oita
  • ,
  • Yoshihiro Takeda

74
5
開始ページ
415
終了ページ
422
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.18926/AMO/60801

During radiation therapy, incident radiation oblique to the skin surface is high and may cause severe skin damage. Understanding the dose of radiation absorbed by the skin is important for predicting skin damage due to radiation. In this study, we used a high-energy (4 MV) X-ray system and an optically stimulated luminescence dosimeter (OSLD) that was developed for personal exposure dosimetry. We determined the dose variation and angular dependence, which are the characteristics of a small OSLD required to derive the calculation formula for the oblique surface dose. The dose variation was determined using the coefficient of variation. The maximum coefficient of variation for 66 small-field OSLDs was 1.71%. The angular dependence, obtained from the dose ratio of the dosimeter in the vertical direction, had a maximum value of 1.37. We derived a new equation in which the oblique surface dose can be calculated within the error range of -7.7-5.1%.

リンク情報
DOI
https://doi.org/10.18926/AMO/60801
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/33106697
ID情報
  • DOI : 10.18926/AMO/60801
  • PubMed ID : 33106697

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