Performance characteristics of the EPR dosimetry system with table sugar in radiotherapy applications

Performance characteristics of the megavoltage photon dose measurements with EPR and table sugar were analyzed. An advantage of sugar as a dosimetric material is its tissue equivalency. The minimal detectable dose was found to be 1.5Gy for both the 6 and 18MV photons. The dose response curves are linear up to at least 20Gy. The energy dependence of the dose response in the megavoltage energy range is very weak and probably statistically insignificant. Reproducibility of measurements of various doses in this range performed with the peak-to-peak and double-integral methods is reported. The method can be used in real-time dosimetry in radiation therapy. •Monitoring and evaluation of the assigned dose in radiotherapy.•Analysis of X-ray irradiated table sugar by using non-destructive EPR method.•Determination of the threshold measurable dose.•Determination of calibration curves by peak to peak and double integration methods.•Dosimetric potentialities of sugar/EPR system in radiotherapy.