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Characterization of stochastic noise and post-irradiation density growth for reflective-type radiochromic film in therapeutic photon beam dosimetry
http://hdl.handle.net/2237/25708
http://hdl.handle.net/2237/25708a09b59eb-99a4-498c-bc08-e7b05cc3213c
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-03-15 | |||||
タイトル | ||||||
タイトル | Characterization of stochastic noise and post-irradiation density growth for reflective-type radiochromic film in therapeutic photon beam dosimetry | |||||
言語 | en | |||||
著者 |
Kamomae, Takeshi
× Kamomae, Takeshi× Oita, Masataka× Hayashi, Naoki× Sasaki, Motoharu× Aoyama, Hideki× Oguchi, Hiroshi× Kawamura, Mariko× Monzen, Hajime× Itoh, Yoshiyuki× Naganawa, Shinji |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Radiochromic film | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Stochastic noise | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Post-irradiation density growth | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Dosimetric uncertainty | |||||
抄録 | ||||||
内容記述 | The aim of this study is to investigate the dosimetric uncertainty of stochastic noise and the post-irradiation density growth for reflective-type radiochromic film to obtain the appropriate dose from the exactly controlled film density. Film pieces were irradiated with 6-MV photon beams ranging from 0 to 400 cGy. The pixel values (PVs) of these films were obtained using a flatbed scanner at elapsed times of 1 min to 120 h between the end of irradiation and the film scan. The means and standard deviations (SDs) of the PVs were calculated. The SDs of the converted dose scale, usd, and the dose increases resulting from the PV increases per ±29 min at each elapsed time, utime, were computed. The combined dose uncertainties from these two factors, uc, were then calculated. A sharp increase in the PV occurred within the first 3 h after irradiation, and a slight increase continued from 3 h to 120 h. usd was independent of post-irradiation elapsed time. Sharp decreases in utime were obtained within 1 h after irradiation, and slight decreases in utime were observed from 1 to 24 h after irradiation. uc first decreased 1 h after irradiation and remained constant afterward. Assuming that the post-irradiation elapsed times of all of the related measurements are synchronized within ±29 min, the elapsed time should be at least 1 h in our system. It is important to optimize the scanning protocol for each institution with consideration of the required measurement uncertainty and acceptable latency time. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Elsevier | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.ejmp.2016.07.091 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 1120-1797 | |||||
書誌情報 |
en : Physica Medica 巻 32, 号 10, p. 1314-1320, 発行日 2016-10 |
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著者版フラグ | ||||||
値 | author | |||||
URI | ||||||
識別子 | http://dx.doi.org/10.1016/j.ejmp.2016.07.091 | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/25708 | |||||
識別子タイプ | HDL |