高線量率アフタローダの出力測定

• 川島 勝弘

  放射線医学総合研究所物理研究部

• 星野 一雄

  放射線医学総合研究所物理研究部

• 平岡 武

  放射線医学総合研究所物理研究部

• 中島 敏行

  放射線医学総合研究所物理研究部

• 荒居 竜雄

  放射線医学総合研究所病院部

• 岡崎 実

  放射線医学総合研究所病院部

• 佐方 周防

  千葉県立がんセンター放射線治療部

• 重松 康

  大阪大学医学部放射線医学教室

書誌事項

タイトル別名

• Measurements of Source Strength of High Dose Rate Afterloader

抄録

The source strength of encapsulated 60Co gamma-ray brachytherapy sources for the high dose rate remote afterloader was measured by the newly developed sandwich method. The calibrated JAPM sub-standard dosemeter whose collecting size is 6 mm in diameter and 20 mm long was used with a digital voltmeter capable of four digits. A sandwich output measuring device made of lucite which has two build-up caps and a bar to fix a guide tube for source capsule was used to achieve a precise result at a short distance from the source. A space between two build-up caps is fixed at 16.0 cm to reduce an error due to geometrical setting up, in the just middle of which the source is transfered through a thin plastic guide tube from a source container. Correction factors were calculated for finite size of the ionization chamber and multi-cells source to regard them as a point detector and a point source. The output is given in the unit of R min-1 cm2 or Gy min-1cm2. The intercomparison of the source strength was also performed with 33 source capsules in 12 radiotherapy facilities.

収録刊行物

• Japan Radiological Physics

  Japan Radiological Physics 1 (1), 3-10, 1981

  一般社団法人 日本医学物理学会

キーワード

• Sandwich method
• Source Strength
• Output
• High dose rate
• Afterloader
• Brachytherapy

詳細情報

• CRID: 1390282679648460288
• NII論文ID: 130001928832
• DOI: 10.11323/jjmp1981.1.1_3
• ISSN: 21869847
• ISSN: 02885506
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可