Tetrazolium salt monomers for gel dosimetry II: Dosimetric characterization of the ClearView? 3D dosimeter

9th International Conference on 3D Radiation Dosimetry

Ascención, Yudy^1 ; Dietrich, Jennifer^1 ; Mequanint, Kibret^2,3 ; Penev, Kalin I.^1,2

Modus Medical Devices Inc., 1570 N Routledge Park, London

ON

N6H 5L6, Canada^1

Department of Chemical and Biochemical Engineering, University of Western Ontario, London

ON

N5A 5B9, Canada^2

Biomedical Engineering Program, University of Western Ontario, London

ON

N6A 5B9, Canada^3

关键词: 3d dosimeters;    Dose sensitivity;    Gel dosimetry;    Gellan gum;    High dose rate;    Large volumes;    Mechanically stable;    Radiation signals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012049/pdf
DOI  :  10.1088/1742-6596/847/1/012049

来源: IOP

【 摘 要 】

ClearView is a colourless radiochromic 3D dosimeter that is chemically and mechanically stable before and after irradiation. Upon irradiation, colour is generated from the radiochemical reduction of a tetrazolium salt suspended within a gellan gum gel. Here we present the dosimetric characterization of small and large volume samples (4 mL and 1 L, respectively) from three different batches of ClearView. The dose sensitivity was linear up to 80 Gy and constant within a batch but varied among batches between 3.4×10-3and 4.1×10-3Gy-1cm-1. Once generated, the radiation signal within the large samples remained unchanged for at least 58 days. Both electrons and photons produced the same signal at different energy levels; however, at dose rates below 400 cGy/min, a drop in sensitivity was observed. Overall, ClearView is best suited for relative dosimetry up to 80 Gy at high dose rates.