TY - JOUR
T1 - Development of radiochromic dosimeters based on polymer films with fluoran and divinyl phthalide dyes
AU - Endo, Toshiya
AU - Koshimizu, Masanori
AU - Fujimoto, Yutaka
AU - Asai, Keisuke
N1 - Funding Information:
This research was supported by the Grant-in-Aid for Scientific Research (A) (Nos. 18H03890, 2018–2021; 22H00308, 2022–2025). Part of this research is based on the Cooperative Research Project of the Research Center for Biomedical Engineering, Ministry of Education, Culture, Sports, Science, and Technology.
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2022/9
Y1 - 2022/9
N2 - We fabricated polyvinyl chloride (PVC) and poly(methyl methacrylate) (PMMA) films containing NIR Black78, Black100 and Black400 for use as dosimeters in radiotherapy, and measured the absorption spectrum of these films before and after X-ray irradiation. Absorption peaks were observed at 456 and 592 nm in the PVC films containing Black400. This result indicates that oxidation reactions of Black400 occurred, suggesting that the radicals generated from PVC by X-ray radiation induced this oxidation. The X-ray sensitivity of the PVC films containing 1.0 wt% Black400 was 28 mm−1 kGy−1, 2.5–70 times higher than that of other polymers containing leuco dyes. The lower limit of detection of 1 mm-thick PVC films containing 1.0 wt% Black400 was 0.17 Gy, rendering them promising for use as dosimeters in radiotherapy.
AB - We fabricated polyvinyl chloride (PVC) and poly(methyl methacrylate) (PMMA) films containing NIR Black78, Black100 and Black400 for use as dosimeters in radiotherapy, and measured the absorption spectrum of these films before and after X-ray irradiation. Absorption peaks were observed at 456 and 592 nm in the PVC films containing Black400. This result indicates that oxidation reactions of Black400 occurred, suggesting that the radicals generated from PVC by X-ray radiation induced this oxidation. The X-ray sensitivity of the PVC films containing 1.0 wt% Black400 was 28 mm−1 kGy−1, 2.5–70 times higher than that of other polymers containing leuco dyes. The lower limit of detection of 1 mm-thick PVC films containing 1.0 wt% Black400 was 0.17 Gy, rendering them promising for use as dosimeters in radiotherapy.
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U2 - 10.1007/s10854-022-08938-8
DO - 10.1007/s10854-022-08938-8
M3 - Article
AN - SCOPUS:85137248666
SN - 0957-4522
VL - 33
SP - 21472
EP - 21481
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 27
ER -