Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지

Radiographic examination protocol and patient dose in lateral cephalometric radiography in Korea

국내 의료기관에서 측방두부규격방사선촬영시 임상에서의 촬영조건 및 환자 선량

  • Choi, Jin-Woo (Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University)
  • 최진우 (서울대학교 치의학대학원 구강악안면방사선학교실 및 치학연구소)
  • Received : 2010.11.22
  • Accepted : 2010.12.03
  • Published : 2010.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose : To survey the radiographic examination protocol for lateral cephalometric radiographic examinations and to measure their patient doses in Korea and to compare the dose according to the size of hospital, the type of image receptor system, and the installation duration. Materials and Methods : The radiographic examination protocols (kVp, mA, and exposure time) for lateral cephalometric radiography were surveyed with 61 cephalometric radiographic equipments and their patient dose-area product (DAP) measured with a DAP meter (DIAMENTOR M4-KDK, PTW, Freiburg, Germany) for 51 cephalometric radiographic equipments. The radiographic examination protocols and patient doses were compared according to the size of hospital (university dental hospital, dental hospital, and dental clinic), the type of image receptor system (film-based, DR and CR type) and the installation duration, respectively. SPSS 12.0.1 for Windows (SPSS Inc., Chicago, USA) was used for independent t-test and ANOVA test. Results : The average protocols were 77.0 kVp, 12.7 mA, 6.2 second for cephalometric radiography. The average patient dose (DAP) was $128.0mGy\;cm^2$ and 3rd quartile dose (DAP) $161.1mGy\;cm^2$ for cephalometric radiography for adult male. There was no statistically significant difference at average patient DAP according to the size of hospital, the type of image receptor system, and the installation duration, repectively. Conclusion : The average patient dose was $128.0mGy\;cm^2$ and the third quartile patient dose $161.1mGy\;cm^2$ for lateral cephalometric radiography for adult male in Korea.

Keywords

References

  1. Hart D, Hillier MC, Wall BF. NRPB-W14. Doses to patients from medical X-ray examinations in the UK - 2000 review [Internet]. Chilton: National Radiological Protection Board; 2002 [2009 Nov 30]. Available from http://www.hpa.org.uk/web/HPAwebFile/HPAweb_C/ 1194947421571.
  2. ICRP. Diagnostic reference levels in medical imaging: review and additional advice. A web module produced by Committee 3 of the International Commission on Radiological Protection (ICRP). ICRP; 2001 [cited 2009 Nov 30], available from http://www.icrp.org/docs/ DRL_for_web.pdf.
  3. Napier ID. Reference doses for dental radiography. Br Dent J 1999; 186 : 392-6.
  4. Lee JS, Kang BC, Yoon SJ. The survey of the surface doses of the dental X-ray machines. Korean J Oral Maxillofac Radiol 2005; 35 : 87-90.
  5. Hong BH, Han WJ, Kim EK. Absorbed and effective dose from spiral and computed tomography for the dental implant planning. Korean J Oral Maxillofac Radiol 2001; 31 : 165-73.
  6. Lee JN, Han WJ, Kim EK. Absorbed and effective dose from newly developed cone beam computed tomography in Korea. Korean J Oral Maxillofac Radiol 2007; 37 : 93-102.
  7. Cho JY, Han WJ, Kim EK. Absorbed and effective dose from periapical radiography by portable intraoral X-ray machine. Korean J Oral Maxillofac Radiol 2007; 37 : 149-56.
  8. Kim EK. Leakage and scattered radiation from hand-held dental X-ray unit. Korean J Oral Maxillofac Radiol 2007; 37 : 65-8.
  9. Gulson AD, Knapp TA, Ramsden PG. HPD-RPD-022. Doses to patients arising from dental X-ray examinations in the U.K, 2002-2004. A review of dental X-ray protection service data [Internet]. Chilton: HPDRPD; 2007 [cited 2009 Nov 30]. Available from http://www.hpa.org. uk/web/HPAwebFile/HPAweb_C/1194947326586
  10. Committee on Quality Assurance in Diagnostic X-ray (H-7). CRCPD publication E-03-2. Patient exposure and dose guide - 2003 [Internet]. Frankfort: CRCPD; 2003 [cited 2009 Nov 30], available from http:// www.crcpd.org/Pubs/ESERePublishedApr03.pdf
  11. Tierris CE, Yakoumakis EN, Bramis GN, Georgiou E. Dose area product reference levels in dental panoramic radiology. Radiat Prot Dosimetry 2004; 111 : 283-7. https://doi.org/10.1093/rpd/nch341
  12. Looe HK, Eenboom F, Chofor N, Pfaffenberger A, Sering M, Rühmann A, et al. Dose-area product measurements and determination of conversion coefficients for the estimation of effective dose in dental lateral cephalometric radiology. Radiat Prot Dosimetry 2007; 124 : 181-6. https://doi.org/10.1093/rpd/ncm143