Basic radiological characteristics of a non-scattering gel dosimeter for 3D dosimetry

Kyung Hwan Chang, Yunseo Ji, Suk Lee, Kwang Hyeon Kim, Dae-Sik Yang, Jung Ae Lee, Young Je Park, Won Sup Yoon, Chul Yong Kim, Yuanjie Cao, Samju Cho

Research output: Contribution to journalArticlepeer-review

Abstract

We used a spectrophotometer to compare the dosimetric properties of two non-scattering (radiochromic) gel dosimeters: a non-scattering gel dosimeter developed in-house and a PRESAGE™ gel dosimeter. We evaluated the dosimetric characteristics, including spectral absorption, dose linearity, reproducibility, and dose rate dependency of the two gel dosimeters. The non-scattering gel and the PRESAGE™ gel dosimeters showed peak sensitivity at wavelengths of 600 nm and 630 nm, respectively. Over a range of doses the best dose linearities of the non-scattering and the PRESAGE™ gel dosimeters resulted in R2 values of 0.99 at wavelengths of 600 nm and 630 nm, respectively. The reproducibility and dose-rate dependence of each of the two gel dosimeters were within the range of ±3 %. Our results revealed that the peak sensitivities of the two radiochromic gel dosimeters were significantly different; the in-house non-scattering gel dosimeter demonstrated peak sensitivity at a wavelength of 600 nm while the PRESAGE™ gel dosimeter had peak sensitivity at a wavelength of 630 nm. We confirmed that for 3D gel dosimetry, the in-house non-scattering gel dosimeter had a more stable dose response compared with a commercial non-scattering gel dosimeter.

Original languageEnglish
Pages (from-to)1694-1699
Number of pages6
JournalJournal of the Korean Physical Society
Volume69
Issue number11
DOIs
Publication statusPublished - 2016 Dec 1

Keywords

  • Non-scattering gel
  • PRESAGE™ gel dosimeter
  • Radiochromic gel
  • Radiological properties
  • Spectrophotometer

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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