| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2026-02-16 |
| タイトル |
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タイトル |
Linear energy transfer correction using Al₂O₃:Cr thermoluminescent and radiophotoluminescence glass dosimeters for therapeutic proton dosimetry |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Weishan Chang
Hina Suzuki
Kenji Hotta
Puspen Chakraborty
Yusuke Koba
Nozomi Ohba
Kiyomitsu Shinsho
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Solid-state luminescence dosimeters face challenge in achieving accurate dosimetry in proton therapy owing to the linear energy transfer (LET)-dependent response. In this study, we proposed a two-dosimeter-based methodology to improve the accuracy of proton dosimetry by correcting the LET-dependent response of a radiophotoluminescence glass dosimeter (RPLD) and an Al2O3:Cr-based ceramic-type thermoluminescence dosimeter (TLD) for postal dosimetry. The LET dependent response for the RPLD and Al2O3: Cr TLD was investigated using an unmodulated 235 MeV proton beam delivered by a passive scattering system. Both dosimeters were individually calibrated in terms of the absorbed dose to water using a 6 MV X-ray beam. The luminescence efficiency ratio between the RPLD and Al2O3: Cr TLD ( RPLD, Al2O3 ∶Cr ) was used as an index to determine the LET dependence correction factor for the RPLD and Al2O3: Cr TLD ( kRPLD LET and k Al2O3 ∶Cr LET ). Modulated proton beams with different spread-out Bragg peak (SOBP) widths were used to evaluate the feasibility of the proposed two-dosimeter methodology. RPLD, Al2O3 ∶Cr decreased with increasing LET. kRPLD LET and k Al2O3 ∶Cr LET were fitted using exponential curves. Proton dosimetry based on the proposed methodology underestimated the absorbed dose to water by an averages of 1.88% and 3.21% for RPLD and Al2O3: Cr TLD, respectively. This demonstrated the feasibility of the proposed methodology. Although the method shows promise for LET correction, the uncertainties in the LET-dependent correction factors, namely 2.39% for the RPLD and 5.84% for the Al₂O₃:Cr TLD, indicate the need for further refinement. |
| 書誌情報 |
Radiological physics and technology
巻 18,
p. 887-885,
発行日 2025-07
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| 出版者 |
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出版者 |
Springer Nature |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0369-4305 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1007/s12194-025-00942-x |
