Spectrophotometric determination of the optimal wavelength for a polymer-gel dosimeter

被引：4

作者：

Chang, Kyung Hwan ^{[1
]}

Lee, Suk ^{[1
]}

Cao, Yuan Jie ^{[1
]}

Shim, Jang Bo ^{[1
]}

Lee, Jung Ae ^{[1
]}

Yang, Dae Sik ^{[1
]}

Park, Young Je ^{[1
]}

Yoon, Won Sup ^{[1
]}

Kim, Chul Yong ^{[1
]}

Cho, Sam Ju ^{[2
]}

Lee, Sang Hoon ^{[3
,4
]}

Kim, Woo Chul ^{[5
]}

Min, Chul Kee ^{[5
]}

Cho, Kwang Hwan ^{[5
]}

Huh, Hyun Do ^{[6
]}

机构：

[1] Korea Univ, Dept Radiat Oncol, Coll Med, Seoul 130701, South Korea

[2] Eulji Univ, Dept Radiol Sci, Songnam 461713, South Korea

[3] Kwandong Univ, Coll Med, Dept Radiat Oncol, Cheil Gen Hosp, Seoul 100380, South Korea

[4] Kwandong Univ, Coll Med, Womens Healthcare Ctr, Seoul 100380, South Korea

[5] Soonchunhyang Univ Hosp, Dept Radiat Oncol, Boocheon 420767, South Korea

[6] Inha Univ Hosp, Dept Radiat Oncol, Inchon 400711, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 62卷 / 08期

关键词：

Polymer gel; Optimal wavelength; Spectrophotometer; Absorbance; Dose linearity;

D O I：

10.3938/jkps.62.1194

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The purpose of this study was to determine the optimal wavelength for a polymer-gel dosimeter previously developed by our research groups; this was done through a spectrophotometric characterization of its dosimetric properties. A gel sample was irradiated with a 6-MV photon beam from a linear accelerator, and its response was spectrophotometrically analyzed. The absorbance, dose linearity, reproducibility, and dose-rate dependence of the dosimeter were evaluated at various wavelengths and doses. The absorbance of the polymer-gel dosimeter did not show any peak sensitivity within the studied range of wavelengths. For the range of doses studied, the best dose linearity was recorded, with an R-2 of 0.9701 at a wavelength of 400 nm. The reproducibility of the results was excellent, and the error in the dose-rate dependence was within the range of +/- 3%. The gel dosimeter displayed a very stable response, thus confirming the efficiency of this 3D dosimeter.

引用

页码：1194 / 1198

页数：5

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