Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Study on Research for Reducing Radiation Dose of Head and Neck for Cephalometric Radiography System

두부규격방사선촬영장치의 두경부 피폭 저감에 대한 연구

  • OH, Yoonjin (Research Institute of Clinical Medicine, Kyung Hee University Hospital at Gangdong) ;
  • Shin, Jae-won (Department of Radiological Science, Dongseo University) ;
  • Lee, Samyol (Department of Radiological Science, Dongseo University)
  • 오윤진 (강동경희대학교병원 임상의학연구소) ;
  • 신재원 (동서대학교 방사선학과) ;
  • 이삼열 (동서대학교 방사선학과)
  • Received : 2016.05.18
  • Accepted : 2016.08.31
  • Published : 2016.08.31
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Abstract

Recently, the interest in the orthodontic treatment for children is increased by a rise in national income level. The number of cephalometric radiography that could diagnose a malocclusion and malposition between teeth and jawbone increased. It required attention to radiation exposure, because the subject of dental examination is children which are more sensitive to radiation and the head and neck, the object of that include radiation sensitive organ such as the thyroid, bone marrow, eyes, salivary gland, and so on. In this study, we measured two-dimensional dose distribution in cephalometric radiography system (VATEC Pax-400C) using Agfa CP-G Plus film and MagicMax Dosimeter, and calculated radiation organ dose of head and neck through MCNPX simulation. And then we designed a radiation protective device to decrease radiation dose. The dose distribution of the cephalometric radiography system irradiated the head and neck overall as well as the oral and maxillofacial parts. The radiation organ dose calculated that thyroid, oesophagus and eyes are irradiated high, and the radiation organ dose decreased about 70 ~ 80% by the application of the radiation protective device. The results of this study will be used construction of database for dental radiation exposure and research of reducing radiation dose.

최근 국민의 소득수준 증가에 따른 소아의 교정치료 등의 관심이 커지면서 치과방사선 검사의 건수가 증가하고 있어 부정교합 및 악골과 치아의 위치변화 등을 관찰할 수 있는 두부규격방사선촬영이 빈번해지고 있다. 특히 검사 대상자가 방사선에 더욱 민감한 소아 층에 집중되어 있고 촬영 부위인 두경부에는 갑상선, 골수, 안구, 타액선 등의 방사선에 민감한 주요 장기가 위치하고 있어 피폭의 주의가 요구된다. 이에 따라 본 연구에서는 Agfa CP-G Plus 필름과 MagicMax 선량계를 이용하여 두경부규격방사선촬영장치(VATEC Pax-400C)에서 발생되는 X선의 2차원 선량분포를 측정하고 MCNPX 시뮬레이션을 통해 두경부 장기선량을 계산하였으며 피폭저감 장치를 설계하였다. 두부규격방사선촬영의 선량분포는 구강악안면의 검사 목적 부위 이외에도 두경부 전체적인 피폭이 일어나고 두경부 주요 장기 중 갑상선과 식도, 눈에서 높은 피폭선량 값을 확인하였다. 그리고 설계한 피폭저감 장치를 적용에 따라 갑상선과 식도, 눈에서 70~80% 피폭이 저감됨을 확인하였다. 본 연구 결과는 치과방사선에 대한 선량 데이터 확보와 방사선 피폭 저감 연구에 있어 매우 유용하게 이용될 것으로 기대된다.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea(NRF)

References

  1. Oral Science Research Center, College of Dentistry, Yonsei University, Oral Imaging, Komoonsa, 2010.
  2. S. Kim, S. Park, "Medical Device Market Research Report," Korea Health Industry Development Institute, Vol. 11, pp. 1-40, 2013.
  3. E. Kim, "Development of diagnostic reference level in dental x-ray examination in Korea," Korea Food & Drug Administration, Research Report, 2009.
  4. J. Lee, B. Kang, S. Yoon, “The survey of the surface doses of the dental X-ray machines,” Korean Journal of Oral and Maxillofacial Radiology, Vol. 35, No. 2, pp. 87-90, 2005.
  5. S. Han, B. Lee, G. Shin, J. Choi, J. Kim, C. Park, H. Park, K. Lee, Y. Kim, “Dose Area Product Measurement for Diagnostic Reference Levels and Analysis of Patient Dose in Dental Radiography,” Radiation Protection Dosimetry, Vol. 150, No. 4, pp. 523-531, 2012. https://doi.org/10.1093/rpd/ncr439
  6. J. Choi, “Radiographic examination protocol and patient dose in lateral cephalometric radiography in Korea,” Korean Journal of Oral and Maxillofacial Radiology, Vol. 40, No. 4, pp. 165-169, 2010.
  7. C. Jeong, C. Kim, “Comparison of Dose Depending on the Position when Shooting Panorama and CBCT,” Journal of the Korean Society of Radiology, Vol. 7, No. 3, pp. 175-179, 2013. https://doi.org/10.7742/jksr.2013.7.3.175
  8. K. A. Van Riper, "Scan2MCNP User Manual," White Rock Science, 2004a.
  9. B. H. Broadbent, “A new X-ray technique and its application to orthodontics,” The Angle Orthodontist, Vol. 1, No. 2, pp. 45-66, 1931.
  10. H. Hofrath, "Die bedeutung der roentgenfern und abs tandsaufnahme furdie diagnostik der kieferanomalien," Fortschr Orthodont, Vol. 1, pp. 232-48, 1931.
  11. E. Kim, “History and Present Status in Dental Radio logy,” Radiation Health Newsletter, Vol. 18, No. 4, pp. 1-12, 2011.
  12. M. Kim, K. Huh, W. Yi, M. Heo, S. Lee, J. Lee, B. Ahn, S.Choi, “The comparison of cephalometric measurements between measuring methods in digital and conventional lateral cephalometric radiograph,” Korean Journal of Oral and Maxillofacial Radiology, Vol. 35, No. 1, pp. 15-23, 2005.
  13. http://www.mfds.go.kr/index.do?seq=22654&mid=675
  14. A. D. Gulson, T. A. Knapp, P. G. Ramsden, "Doses to patients arising from dental X-ray examinations in the UK, 2002-2004. A review of dental X-ray protection service data," HPA-RPD-022, 2007.
  15. H. K. Looe, F. Eenboom, N. Chofor, A. Pfaffenberger, M.Sering, A. Ruhmann, A. Poplawski, K. Willborn, B. Poppe, “Dose-area product measurements and determination of conversion coefficients for the estimation of effective dose in dental lateral cephalometric radiology,” Radiation Protection Dosimetry, Vol. 124, No. 2, pp. 181-186, 2007. https://doi.org/10.1093/rpd/ncm143
  16. H. Visser, T. Rodig, K. P. Hermann, “Dose Reduction by Direct-Digital Cephalometric Radiography,” The Angle Orthodontist, Vol. 71, No. 3, pp. 159-163, 2001.
  17. J. B. Ludlow, L. E. Davies-Ludlow, S. C. White, “Patient Risk Related to Common Dental Radiographic Examinations,” Journal of the American Dental Association, Vol. 139, No. 9, pp. 1237-1243, 2008. https://doi.org/10.14219/jada.archive.2008.0339
  18. S. Han, B. Lee, G. Shin, J. Choi, H. Park, C. Park, G. Chang, B. Kim, Y. Kim, “Evaluation of effective dose in dental radiography,” Journal of radiological science and technology, Vol. 34, No. 1, pp. 27-33, 2011.
  19. F. Gijbels, G. Sanderink, J. Wyatt, J. Van Dam, B. Nowak, R. Jacobs, "Radiation doses of collimated vs non-collimated cephalometric exposures," Dentomaxillo-facial Radiology. Vol. 32, No. 2, pp. 128-133, 2003. https://doi.org/10.1259/dmfr/33233723