Development of radiochromic dosimeters based on polymer films with fluoran and divinyl phthalide dyes

Toshiya Endo, Masanori Koshimizu, Yutaka Fujimoto, Keisuke Asai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalJournal of Materials Science: Materials in Electronics
DOIs
Publication statusAccepted/In press - 2022

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