Fricke gel diffusion coefficient measurements for applications in radiotherapy level dosimetry

Abstract

In gel dosimetry applied to radiotherapy, the space–time corrections are necessary due to the diffusion of ions in the oxidized solution dosimetry. Consequently, methodologies are applied in order to determine diffusion coefficients corrected in space and time. Therefore, in this study the dosimetric solution Fricke Xylenol Gel (FXG) was modified and applied to two Gaussian and ISQR methodologies for comparison of the diffusion coefficients obtained. The results show that the FXG system can be modified for new applications in radiotherapy, and it may be corrected in space–time to the appropriate methodologies in the determination of diffusion coefficients.