Preliminary study on precision dosimetry using radio-photoluminescent glass dosimeters for future use in radiotherapy

The radio-photoluminescence glass dosimetry test was carried out carefully. For the test, a therapy level Co-60 gamma-ray beam was used for the irradiation of the known doses to the dosimeters with the standard uncertainty of 0.7 % (k = 1). A weak negative correlation between mass and response of the glass dosimeter was found with Pearson’s correlation coefficient -0.27, -0.29, -0.29, -0.27 and -0.26 for glass dosimeters irradiated at 1, 3, 5, 7 and 9 Gy radiation doses, respectively. It has been confirmed that the statistical uncertainty of the radio-photoluminescence glass dosimetry can be obtained within 1 % from the repeatability test.