定位放射線照射における頭部(RSVP)ファントムを用いた線量評価 Dosimetry study using an anthropomorphic head phantom for stereotactic radiosurgery

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抄録

A dosimetry study using an anthropomorphic head phantom (Radiosurgery Verification Phantom (RSVP)) and a micro ionization chamber for stereotactic radiosurgery was performed. To study the characteristics of the micro ionization chamber, tissue maximum ratios (TMRs), off-axis ratios (OARs) and output factors were measured and compared, using a Si semiconductor detector and the film method. The directional difference in sensitivity and the effect of the polarity of the micro io nization chamber were measured. According to the results obtained, the measured values and the values obtained through calculation were in agreement within 6.3%. The difference was due to the larger size of the micro io nization chamber as compared to the other method. Therefore we applied a correction for this size effect and obtained better agreement within 2%. On the basis of the results of the present study we were able to confirm the overall accuracy and establish a means of quality assurance (QA) for stereotactic radiosurgery.

収録刊行物

  • 医学物理 : 日本医学物理学会機関誌 = Japanese journal of medical physics : an official journal of Japan Society of Medical Physics  

    医学物理 : 日本医学物理学会機関誌 = Japanese journal of medical physics : an official journal of Japan Society of Medical Physics 20(1), 38-45, 2000-03-31 

    一般社団法人 日本医学物理学会

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各種コード

  • NII論文ID(NAID)
    10004573811
  • NII書誌ID(NCID)
    AA11580542
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13455354
  • NDL 記事登録ID
    5673589
  • NDL 雑誌分類
    ZS45(科学技術--医学--放射線医学)
  • NDL 請求記号
    Z19-1395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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