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Recent results of a postal dose audit for radiotherapy machine in Japan with non-reference condition
https://repo.qst.go.jp/records/71504
https://repo.qst.go.jp/records/71504fddf2d7f-3048-4969-b5e1-a87e53f1263f
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-09-30 | |||||
| タイトル | ||||||
| タイトル | Recent results of a postal dose audit for radiotherapy machine in Japan with non-reference condition | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mizuno, Hideyuki
× Mizuno, Hideyuki× Yamashita, Wataru× Takase, Nobuhiro× Sakata, Suho× Fukahori, Mai× Fukumura, Akifumi× 水野 秀之× 山下 航× 高瀬 信宏× 佐方 周防× 深堀 麻衣× 福村 明史 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose In Japan, postal dose audits have been performed on the radiation therapy units using a radiophotoluminescent glass dosimeter (RGD) since 2007. In 2010, the audit for the non-reference condition including field size change or wedge insertion was initiated. This study summarizes the latest results of non-reference condition. Methods Through these 4 years, 458 beams have been measured for different field size from 5 x 5 cm2 to 25 x 25 cm2 and 301 beams have been measured for different wedge angle from 15 to 60 degrees. Results For the beams with the field size change, the mean differences of measured from stated dose at each field size, 5 x 5 (n = 197), 15 x 15 (n = 55), 20 x 20 (n = 173), and 25 x 25 (n =33) cm2, were -0.3%, 0.3%, 0.4%, and 0.2% respectively. The standard deviations of the distribution at each field size were 1.0%, 1.0%, 1.2%, and 1.5% respectively. For the wedged beam irradiation, the mean of the differences of measured from stated dose with each wedge angles, 15° (n = 112), 30° (n = 102), 45° (n = 45), and 60° (n = 42), were 0.1%, 0.1%, 0.1%, and 0.3% respectively. The standard deviations of the distribution at each wedged angle were 1.0%, 1.3%, 1.2%, and 1.3% respectively. Conclusion The postal dose audit using RGD to non-reference condition has been successfully performed. The mean differences of measured from stated dose were within 0.5% for every field size and wedge angle. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 7th Korea-Japan Joint Meeting on Medical Physics | |||||
| 発表年月日 | ||||||
| 日付 | 2014-09-25 | |||||
| 日付タイプ | Issued | |||||
