Feasibility study of radiophotoluminescent glass rod dosimeter postal dose intercomparison for high energy photon beam.
A radiophotoluminescent glass rod dosimeter (GRD) system has recently become commercially available. In this study we evaluated whether the GRD would be suitable for external dosimetric audit program in radiotherapy. For this purpose, we introduced a methodology of the absorbed dose determination with the GRD by establishing calibration coefficient and various correction factors (non-linearity dose response, fading, energy dependence and angular dependence). A feasibility test of the GRD postal dose intercomparison was also performed for eight high photon beams by considering four radiotherapy centers in Korea. In the accuracy evaluation of the GRD dosimetry established in this study, we obtained within 1.5% agreements with the ionization chamber dosimetry for the (60)Co beam. It was also observed that, in the feasibility study, all the relative deviations were smaller than 3%. Based on these results, we believe that the new GRD system has considerable potential to be used for a postal dose audit program.
Rah
Jeong-Eun
JE
Department of Biomedical Engineering, The Catholic University of Korea College of Medicine, 505 Banpodong, Seoul, Republic of Korea.
Kim
Siyong
S
Cheong
Kwang-Ho
KH
Lee
Jeong-Woo
JW
Chung
Jin-Beom
JB
Shin
Dong-Oh
DO
Suh
Tae-Suk
TS
D002138:Calibration; D005240:Feasibility Studies; D005898:Glass; D007723:Korea; D008722:Methods; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000592:standards; D011874:Radiometry / Q000295:instrumentation* / Q000592:standards; D011878:Radiotherapy