Inclusion type radiochromic gel dosimeter for threedimensional dose verification

8th International Conference on 3D Radiation Dosimetry

Usui, Shuji^1 ; Yoshioka, Munenori^1 ; Hayashi, Shin-Ichiro^1 ; Tominaga, Takahiro^1

Department of Clinical Radiology, Hiroshima International University, Higashi-Hiroshima, Hiroshima

739-2695, Japan^1

关键词: Bromoacetic acids;    Dose distributions;    Dose verification;    Highly branched cyclic dextrins;    Inclusion complex;    Leucomalachite green;    Manganese chloride;    Radiation-induced radical;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/573/1/012035/pdf
DOI  :  10.1088/1742-6596/573/1/012035

来源: IOP

【 摘 要 】

For the verification of 3D dose distributions in modern radiation therapy, a new inclusion type radiochromic gel detector has been developed. In this gel, a hydrophobic leuco dye (leucomalachite green: LMG) was dissolved in water as an inclusion complex with highly branched cyclic dextrin. The radiation induced radical oxidation property of the LMG gel with various sensitizers was investigated. As a result, the optical dose responses were enhanced by the addition of bromoacetic acid and manganese (II) chloride. Unfavorable auto-oxidation of the gel was reduced when it was stored at 4°C.