Feasibility study of perovskite film dosimeter for radiotherapy quality assurance

Abstract In this study, we developed a film-type perovskite dosimeter that can be used as a radiotherapy quality assurance (QA) dosimeter while replacing the existing semiconductor dosimeter. Dosimeter performance was evaluated by reproducibility, linearity, dose rate dependence, and percentage depth dose (PDD). In terms of reproducibility, the relative standard deviation (RSD) at 6 MV and 15 MV energy were 1.058% and 1.003%, respectively. As a result of linearity, a coefficient of determination of 0.9999 was presented at 6 MV and 15 MV energies. In terms of dose rate dependence evaluation, the RSD was 1.242% and 0.628% at 6 MV and 15 MV energies, respectively. As for PDD measurement, the result of matching the D max point was obtained. Our analysis confirms that the perovskite film dosimeter made of CsPbBr 3 was suitable for use as a QA dosimeter in radiotherapy.