Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
권호 표지
DOI QR코드

DOI QR Code

EFFECTIVE DOSE FROM CONE BEAM CT FOR IMAGING OF MESIODENS

상악 정중과잉치 진단을 위한 cone beam CT의 유효선량

  • Han, Won-Jeong (Department of Oral and Maxillofacial Radiology, Dental College, Dankook University) ;
  • Kim, Jong-Soo (Department of Pediatric Dentistry, Dental College, Dankook University)
  • 한원정 (단국대학교 치과대학 구강악안면방사선학교실) ;
  • 김종수 (단국대학교 치과대학 소아치과학교실)
  • Received : 2012.08.02
  • Accepted : 2012.08.14
  • Published : 2012.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose : This study was aimed to calculate effective dose from cone beam CT and compare effective dose from periapical and panoramic radiography for mesiodens. Materials and Methods : Upper anteiror periapical, panoramic radiography and cone-beam CT were taken for diagnosis of mesiodens. The effective dose were calculated by using an anthropomorphic phantom loaded with thermoluminescent dosimeters at the 23 sites related to sensitive organs. Results : The highest absorbed doses were received by the mandibular body, parotid gland and cheek from periapical, panoramic and cone-beam CT, respectively. The effective doses for periapical, panoramic radiography and cone-beam CT measured 2, 18 and 48 ${\mu}Sv$. Conclusion : Cone-beam CT, although providing additional diagnostic benefits, exposes patients to higher levels of radiation than conventional periapical and panoramic radiography.

목적: 상악 정중과잉치의 영상진단 시 시행되는 콘빔 전산화단층촬영술에 대한 환자의 방사선 피폭을 유효선량으로 평가하고, 치근단 및 파노라마방사선촬영술의 방사선피폭과 비교하고자 하였다. 재료 및 방법: 선량 측정용 두경부 마네킨의 23부위에 열형광선량계 소자를 위치시키고 해당 방사선촬영술을 시행하였다. 열형광선량계 판독기로 흡수선량를 측정하고 방사선 조사된 조직의 비율을 곱하여 방사선 가중선량을 구한 후, 국제방사선방호위원회에서 2007년에 공지한 조직 가중계수를 이용하여 유효선량을 구하였다. 결과: 조직 및 기관의 흡수선량은 콘빔 전산화단층촬영술, 치근단방사선촬영술 그리고 파노라마방사선촬영술에서 뺨, 하악체, 이하선에서 가장 높았다. 유효선량은 콘빔 전산화단층촬영에서는 48 ${\mu}Sv$, 치근단방사선촬영술에서는 2 ${\mu}Sv$ 그리고 파노라마방사선촬영술에서는 18 ${\mu}Sv$였다. 결론: 상악 정중과잉치 진단 시, 추가적인 진단학적 정보를 제공하지만, 콘빔 전산화단층촬영술은 일반 치근단 및 파노라마 방사선촬영술보다 방사선피폭이 크다.

Keywords

References

  1. Kim JB, Kim JS, Park JE : The incidence of mesiodens. J Korean Acad Pediatr Dent 34:646-650, 2007.
  2. Kim SG, Kim SH, Chung TY : A clinical study of mesiodens. J Korean Assoc Oral Maxillofac Surg 26:681-683, 2000.
  3. Asaumi JI, Shibata Y, Yanagi Y, et al. : Radiographic examination of mesiodens and their associated complications. Dentomaxillofac Radiol 33:125-127, 2004. https://doi.org/10.1259/dmfr/68039278
  4. Russell KA, Folwarczna MA : Mesiodens-diagnosis and management of a common supernumerary tooth. J Can Dent Assoc 69:362-366, 2003.
  5. Gunduz K, Celenk P, Zengin Z, et al. : Mesiodens: a radiographic study in children. J Oral Sci 50:287-291, 2008. https://doi.org/10.2334/josnusd.50.287
  6. Tyrologou S, Koch G, Kurol J : Location, complications and treatment of mesiodentes-a retrospective study in children. Swed Dent J 29:1-9, 2005.
  7. Jacobs R : Dental cone beam CT and its justified use in oral health care. JBR-BTR 94:254-265, 2011.
  8. Lee DH, Lee JS, Yoon SJ, et al. : Three dimensional evaluation of impacted mesiodens using dental cone beam CT. Korean J Oral Maxillofac Radiol 37:93-102, 2007.
  9. Choi BJ, Lee YS, Kim SO, et al. : Study of invertly impacted supernumerary teeth in the midpalatal region using computerized tomography. J Korean Acad Pediatr Dent 30:363-372, 2003.
  10. Jung AY : Medical radiation exposure in children and dose reduction. J Korean Med Assoc 54:1277-1283, 2011. https://doi.org/10.5124/jkma.2011.54.12.1277
  11. Rice HE, Frush DP, Farmer D : Review of radiation risks from computed tomography: essentials for the pediatric surgeon. J Pediatr Surg 42:603-607, 2007. https://doi.org/10.1016/j.jpedsurg.2006.12.009
  12. Ludlow JB, Davies-Ludlow LE, Brooks SL, et al. : Dosimetry of 3 CBCT devices for oral and maxillofacial radiology: CB Mercuray, NewTom 3G and ICAT. Dentomaxillofac Radiol 35:219-226, 2006. https://doi.org/10.1259/dmfr/14340323
  13. Ludlow JB, Davies-Ludlow LE, Brooks SL : Dosimetry of two extraoral direct digital imaging device: NewTom cone beam CT and Orthophos Plus DS panoramic unit. Dentomaxillofac Radiol 32:229-234, 2003. https://doi.org/10.1259/dmfr/26310390
  14. Cho JY, Han WJ, Kim EK : Absorbed and effective dose from periapical radiography by portable intraoral x-ray machine. Korean J Oral Maxillofac Radiol 37:149-156, 2007.
  15. Avendanio B, Fredericksen NL, Benson BW, et al. : Effective dose and risk assessment from detailed narrow beam radiography. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 82:713-719, 1996. https://doi.org/10.1016/S1079-2104(96)80448-3
  16. White SC, Pharoah MJ : Oral radiology ; principles and interpretation. Mosby, Missouri, 6th edition. 2008.
  17. Choi SC, Choi HM : Absorbed dose in the full mouth periapical radiography, panoramc radiography and zonography. Korean J Oral Maxillofac Radiol 29:255-260, 1999.
  18. Underhill TE, Chilvarquer I, Kimura K, et al.: Radiobiologic risk estimation from dental radiology. Part I. absorbed doses to critical organs. Oral Surg Oral Med Oral Pathol 66:111-120, 1988. https://doi.org/10.1016/0030-4220(88)90077-1
  19. Hayakawa Y, Kobayashi N, Kuroyanagi K, et al. : Paediatric absorbed doses from rotational panoramic radiography. Dentomaxillofac Radiol 30:285-292, 2001. https://doi.org/10.1038/sj.dmfr.4600625
  20. Han WJ : Absorbed and effective dose for periapical radiography using portable and wall type dental Xray machines. J Korean Assoc Prosth 50:184-190, 2012 https://doi.org/10.4047/jkap.2012.50.3.184
  21. Han WJ : Absorbed and effective dose from periapical radiography by portable intraoral x-ray machine and panoramic radiography. J Korean Dent Assoc 50:148-158, 2012.
  22. Mozzo P, Procacci A, Taccon A, et al. : A new volumetric CT machine for dental imaging based on cone-beam technique: preliminary results. Eur Radiol 8:1558-1564, 1998. https://doi.org/10.1007/s003300050586
  23. Wortche R, Hassfeld S, Lux CJ, et al. : Clinical application of cone beam digital volume tomography in children with cleft lip and palate. Dentomaxillofac Radiol 35:88-94, 2006. https://doi.org/10.1259/dmfr/27536604
  24. Silva MA, Wolf U, Heinicke F : Cone-beam computed tomography for routine orthodontic treatment planning ; A radiation dose evaluation. Am J Orthod Dentofacial Orthop 133:640.e1-640.e5, 2008. https://doi.org/10.1016/j.ajodo.2007.11.019
  25. Jeong DK, Lee SC, Huh KH, et al. : Comparison of effective dose for imaging of mandible between multi- detector CT and cone-beam CT. Imaging Sci Dent 42:65-70, 2012. https://doi.org/10.5624/isd.2012.42.2.65
  26. Lorenzoni DC, Bolognese AM, Garib DG : Conebeam computed tomography and radiographs in dentistry ; aspects related to radiation. Int J Dent 2012:813768, 2012.
  27. De Vos W, Casselman J, Swennen GR : Cone-beam computerized tomo graphy(CBCT) imaging of the oral and maxillofacial region ; a systematic review of the literature. Int J Oral Maxillofac Surg 38:609-625, 2009. https://doi.org/10.1016/j.ijom.2009.02.028
  28. Theodorakou C, Walker A, Horner K : Estimation of paediatric organ and effective doses from dental cone beam CT using anthropomorphic phantoms. Br J Radiol 85:153-160, 2012. https://doi.org/10.1259/bjr/19389412
  29. Brenner D, Elliston C, Hall E, et al. : Estimated risks of radiation-induced fetal cancer from pediatric CT. AJR Am J Roentgenol 176:289-296, 2001. https://doi.org/10.2214/ajr.176.2.1760289
  30. Brendan F : CBCT-the justification process, audit and review of the recent literature. J Irish Dent Assoc 57:256-261, 2011.