Study on Dosimetric Properties of Radiophotoluminescent Glass Rod Detector

유리선량계의 선량 특성에 관한 연구

  • Rah, Jeong-Eun (Dept. of Biomedical Engineering, College of Medicine, Catholic University) ;
  • Shin, Dong-Oh (Dept. of Radiation Oncology, College of Medicine, Kyung Hee University) ;
  • Hong, Ju-Young (Dept. of Biomedical Engineering, College of Medicine, Catholic University) ;
  • Kim, Hee-Sun (Radiation Health Research Institute) ;
  • Lim, Chun-Il (Radiation Standards Division, Korea Food & Drug Administration) ;
  • Jeong, Hee-Gyo (Medical Devices Standardization Division, Korea Food & Drug Administration) ;
  • Suh, Tea-Suk (Dept. of Biomedical Engineering, College of Medicine, Catholic University)
  • 라정은 (가톨릭의대 의공학교실) ;
  • 신동오 (경희의대 방사선종양학교실) ;
  • 홍주영 (가톨릭의대 의공학교실) ;
  • 김희선 (한국수력원자력(주) 방사선보건연구원) ;
  • 임천일 (식품의약품안전청 방사선표준과) ;
  • 정희교 (식품의약품안전청 의료기기규격과) ;
  • 서태석 (가톨릭의대 의공학교실)
  • Published : 2006.12.30


A radiophotoluminescent glass rod detector (GRD) system has recently become commercially available. We investigate the dosimetric properties of the GRD regarding the reproducibility of signal, dose linearity and energy dependence. The reproducibility of five measurements for 50 GRDs is presented by an average of one standard deviation of each GRD and it is ${\pm}1.2%$. It is found to be linear in response to doses of $^{60}Co$ beam in the range 0.5 to 50 Gy with a coefficient of linearity of 0.9998. The energy dependence of the GRD is determined by comparing the dose obtained using cylindrical chamber to that by using the GRD. The GRD response for each beam is normalized to the response for a $^{60}Co$ beam. The responses for 6 and 15 MV x-ray beams are within ${\pm}1.5%$ (1SD). The energy response of GRD for high-energy photon is almost the same as the energy dependence of LiF:Mg:Ti (TLD-100)and shows little energy dependence unlike p-type silicon diode detector. The GRDs have advantages over other detectors such diode detector, and TLD: linearity, reproducibility and energy dependency. It has been verified to be an effective device for small field dosimetry for stereotactic radiosurgery.


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