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

Appl Radiat Isot. 2015 May:99:1-4. doi: 10.1016/j.apradiso.2015.02.010. Epub 2015 Feb 11.

Abstract

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.

Keywords: EPR dosimetry; Linear accelerator; Radiotherapy; Table sugar.

MeSH terms

  • Biomimetic Materials / chemistry*
  • Biomimetic Materials / radiation effects
  • Dietary Sucrose / analysis*
  • Dietary Sucrose / chemistry*
  • Electron Spin Resonance Spectroscopy / methods*
  • Humans
  • Radiation Dosage
  • Radiometry / methods*
  • Radiotherapy / methods*
  • Reproducibility of Results
  • Sensitivity and Specificity

Substances

  • Dietary Sucrose