A Study on Characteristic of Glass Dosimeter According to Graded Change of Tube Current

유리선량계의 단계별 관전류량 변화에 따른 특성연구

  • Son, Jin-Hyun (Department of Radiological Science, Shin-Gu University) ;
  • Kim, Seong-Ho (Department of Radiological Science, Shin-Gu University) ;
  • Mun, Hyun-Jun (Department of Radiological Science, Shin-Gu University) ;
  • Kim, Lyun-Kyun (Department of Radiological Science, Shin-Gu University) ;
  • Son, In-Hwa (Department of Radiological Science, Shin-Gu University) ;
  • Kim, Young-Jun (Department of Radiological Science, Shin-Gu University) ;
  • Min, Jung-Whan (Department of Radiological Science, Shin-Gu University) ;
  • Kim, Ki-Won (Department of Radiology, Samsung Medical Center)
  • Received : 2014.05.01
  • Accepted : 2014.06.18
  • Published : 2014.06.30

Abstract

This study was evaluated the linearity and reproducibility according to dose, and reproducibility according to delay time by changing tube current amount (5 mAs, 10 mAs, 16 mAs, 20 mAs, 25 mAs, 32 mAs respectively, which are low energy radiations) using Glass Dosimeter (GD) and piranha semiconductor dosimeter which are used for measuring exposure dose. Measurements of radiation dose were performed using external detector of piranha 657 which is multi-function QA device (RTI Electronic, Sweden). Conditions of measurement were 80 kVp, SSD 100 cm and exposure region is $10cm{\times}10cm$. Glass dosimeter was exposed to radiation. Twenty-four glass dosimeters were divided into six groups (5 mAs, 10 mAs, 16 mAs, 20 mAs, 25 mAs, 32 mAs respectively), then measured. This study was resulted by measuring the linearity and reproducibility according to change of tube current in low energy field. In dose characteristic of GD, this study could be useful as previous study with regard to dose characteristic according to change of tube voltage in low energy field.

개인의 피폭선량 측정에 사용되는 유리선량계 (Glass Dosimeter; GD)와 선량측정용 Piranha 반도체 선량계를 이용하여 진단방사선영역에서 사용하는 저에너지 X-선 영역에서 관전류량을 변화시켜 (5mAs, 10mAs, 16mAs, 20mAs, 25mAs, 32mAs의 저에너지 방사선) 측정하여 선량에 따른 선형성과 재현성, 그리고 지연시간에 따른 재현성을 평가하였다. 방사선량 측정은 다기능 QA 측정기 (RTI Electronic, Sweden)인 Piranha 657의 external detector로 측정하였다. 측정 조건은 80 kVp, SSD 100 cm로 조사영역은 $10cm{\times}10cm$으로 하였으며 유리선량계에 방사선을 조사하였다. 24개의 유리선량계들은 6 개의 그룹 (5mAs, 10mAs, 16mAs, 20mAs, 25mAs, 32mAs)로 나누고 측정을 하였다. 본 연구는 저 에너지 영역에서 관전류를 변화시켜 선형성 및 재현성을 측정한 결과이며, 유리선량계의 선량 특성에서 앞선 연구의 관전압 변화에 따른 특성과 같이 저 에너지 영역에서도 유용할 것으로 사료된다.

Keywords

References

  1. F. Araki , T. Ikegami, T. Ishidoya, D. H. Kubo : Measurements of Ga㎜a-Knife Helmet Output Factors Using a Radiophotoluminescent Glass Rod Dosimeter and a Diod Detector. Med. Phys. 30, 1976-1981, 2003 https://doi.org/10.1118/1.1587451
  2. M. Tsuda: A Few Remarks on Photoluminescence Dosimetry with High Energy X-rays. Jpn. J.Med. 20, 131-139, 2000
  3. Asahi Techno Glass Corporation: Explanation Meterial of RPL Glass Dosimeter: Small Element System. Tokyo, Japan, 2000
  4. Jeong-Eun Rah, Ju-Young Hong, Gwe-Ya Kim et al : A comparison of the dosimetric characteristics of a glass rod dosimeter and a thermoluminescent dosimeter for mailed dosimeter. Radiation measurements. 44, 18-22 2009 https://doi.org/10.1016/j.radmeas.2008.10.010
  5. C. G. kim, Measurement dose of dental panoramagraphy using a radiophotoluminescent glass rod detector, Korea academia industrial cooperation journal. 12(6), 2624-2628, 2011 https://doi.org/10.5762/KAIS.2011.12.6.2624
  6. Food & Drug Administration : Measurement Guideline of Patient dose, Seoul. Korea. 14, 5, 2007
  7. ICRP: 1990 Recommendations of the International Commission on Radiological Protection. Pergamon Press, Oxford, Publication 60, Annals of the ICRP. 21, 1-3, 1991
  8. KFDA : 2012 Guideline on patient dose suggestion of general radiology. 1-56, 2012
  9. J. H. Choi, et al : Comparison on the dosimetry of TLD and PLD by dose area product. Journal of the Korea Contents Association. 12(3), 244-250, 2012
  10. Yeun Jung, Kyung-Rae Dong, Dae-Chdeol Kweon et al : A study on the effects of scattering dose on eyes and thyroid for panoramagraphy (Focus on TLD and PLD). J. Korea Asso. Radiat Prot. 35(1), 1-5, 2010
  11. K. R. Dong : A study on the effects of scattering dose on eyes and thyroid for panoramagraphy (Focus on TLD and PLD). The Journal of the Korea Contents Association. 7(1), 1118-1123, 2009
  12. Jin-Hyun Son, Jung-Whan Min, Jung-Min Kim et al: Experimental Study with Respect to Dose Characteristic of Glass Dosimeter for Low-Energy by Using Internal Detector of Piranha 657. Journal of Radiological Science and Technology. 119-124, 2012
  13. RTI Electronics Inc: Piranha Reference Manual. Version 4.3A (10), 21, 2012
  14. C. G. Kim : Diagnosis X-ray exposure dose measuring device when pre-heat effect. KAIS Spring Conference, 380-382, 2013
  15. K. H. Son, S. H. Sin, C. Y. Lee et al : The characteristic evaluation of high dose linearity, accumulation dose, energy dependency of glass dosimeter. J. Korea Asso. Radiat Prot. 66-67, 2009
  16. J. E. Rah, D. O. Shin, J. Y. Hong, et al : Study on Dosimetric Properties of Radiophoto luminescent Glass Rod Detector. J. Korea Asso. Radiat Prot. 31(4), 181-186, 2006