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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