Diffusion properties of a radiochromic hydrogel dosimeter

7th International Conference on 3D Radiation Dosimetry

Skyt, P.S.^1,2 ; Kinnari, T.S.^2 ; Wahlstedt, I.^2 ; Yates, E.S.^1 ; Muren, L.P.^1 ; Petersen, J.B.B.^1 ; Balling, P.^2

Dept. of Medical Physics, Aarhus University, Aarhus University Hospital, Denmark^1

Dept. of Physics and Astronomy, Aarhus University, Denmark^2

关键词: Autooxidation;    Diffusion properties;    Diffusion rate;    Dose gradients;    High resolution;    Leucomalachite green;    Optical response;    Optical scanners;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012038/pdf
DOI  :  10.1088/1742-6596/444/1/012038

来源: IOP

【 摘 要 】

The aim of this study was to investigate the diffusion properties of a radiochromic hydrogel dosimeter based on leuco malachite green dye in a gelatine matrix. One half of each dosimeter was irradiated while the other half was left un-irradiated creating dose gradients over which diffusion could be investigated. Read-out of the optical response was performed with a high-resolution optical scanner. The dosimeters were found to exhibit a low diffusion rate but a high auto-oxidation level leading to a fading of the contrast in the dose response with time.