Dosimetric response of a glass dosimeter in proton beams: LET-dependence and correction factor

A radiophotoluminescent glass dosimeter (RGD) is widely used in postal audit system for photon beams Japan. However, proton dosimetry RGDs scarcely owing to a lack of clarity their response beam quality. In this study, we investigated RGD quality establishing suitable linear energy transfer (LET)-corrected protocol therapeutic beam.The was compared with ionization chamber measurement 100–225 MeV passive beam. LET the points calculated by Monte Carlo method. An LET-correction factor, defined as ratio between non-corrected dose and dose, 1.226×(LET)-0.171 derived response. The magnitude LET-dependence increased LET; an 8.2 keV/μm, under-response up 16%. coefficient determination, mean difference ± SD residual range-corrected LET-corrected are 0.923, 3.7 4.2%, −2.4 7.5%, 0.04 2.1%, respectively. within 5% corresponding at all energies until 200 MeV, where it 5.3% lower than dose.A corrected using correction factor based on power function precise dosimetric verification close maximum were realized here. We further confirmed establishment accurate under various irradiation conditions.