3차원 콘빔CT 영상에서 형성한 2차원 정모두부방사선사진영상의 정확도 증진을 위한 두부자세재현기의 효과
Use of Head Posture Aligner to improve accuracy of frontal cephalograms generated from cone-beam CT scans
2
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
본 연구는 3차원 콘빔CT 영상을 이용하여 2차원 정모두부방사선사진영상 형성 시 두부자세재현기(Head Posture Aligner, HPA)를 이용한 경우와 이용하지 않은 경우를 비교분석함으로써 HPA의 유용성을 평가하기 위하여 시행되었다. 성인 30명을 대상으로 먼저 일반적인 방법으로 콘빔CT 영상을 채득한 후 HPA를 이용하여 일정한 두부자세를 재현한 상태에서 또 하나의 콘빔CT 영상 및 정모두부방사선사진을 촬영하였다. 3차원 영상프로그램을 이용하여 HPA를 이용하지 않은 경우와 HPA를 이용한 경우 각각에서 2차원 정모두부방사선사진영상을 형성한 다음 각각의 투사도를 작성하고 실제로 HPA를 이용하여 촬영된 정모두부방사선사진 투사도와의 차이를 비교하였다. 거리 및 각도를 나타내는 여러 계측치를 비교분석한 결과 HPA를 이용하지 않은 경우에는 다수의 계측항목에서 실제 정모두부방사선사진과 유의한 차이를 보인 반면 HPA를 이용한 경우에는 모든 항목에서 통계적 유의차를 보이지 않았다. 아울러 실제 정모두부방사선사진과의 상관관계를 알아보기 위해 상관분석을 시행한 결과 HPA를 이용한 경우가 그렇지 않은 경우보다 모든 항목에서 높은 상관성을 보였다. 본 연구 결과는 3차원 콘빔CT 영상을 이용하여 2차원 정모두부방사선사진영상 형성 시 정확한 영상 획득을 위해서는 콘빔CT 촬영 시 HPA의 사용이 필요함을 시사하였다.
Abstract
Objective: The purpose of the present study was to evaluate the effectiveness of the use of Head Posture Aligner (HPA) during cone-beam computed tomography (CBCT) scan in generation of frontal cephalograms using 3D CBCT images. Methods: CBCT scans and frontal cephalograms were made in 30 adult individuals. While a couple of CBCT scan was made for one subject, one was made with conventional method, without use of HPA, the other was acquired with the use of HPA. After creation of virtual frontal cephalogram from each 3D CBCT image, it was traced and compared with the tracing of real frontal cephalogram. Results: In the comparison of the measurements, the virtual cephalograms with the use of HPA did not show statistically significant differences with the real cephalograms whereas the virtual cephalograms without the use of HPA presented significant differences with real cephalograms in many measurements. In the correlation analysis with the measurements of the real cephalograms, the virtual cephalograms with the use of HPA showed higher correlations in all measurements than the virtual cephalograms without the use of HPA. Conclusions: Measurements from CBCT-generated cephalograms become similar to those from real cephalograms with the use of HPA during CBCT scan. Thus, the use of HPA is suggested during the CBCT scan in order to construct accurate virtual frontal cephalograms using 3D CBCT images.
참고문헌 (22)
- Vannier MW, "Three dimensional CT reconstruction images for craniofacial surgical planning and evaluation", Radiology, 150, pp.179~184 (1984)
- Mozzo P, "A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results", Eur Radiol, 8, pp.1558~1564 (1998)
- Mah JK, "Radiation absorbed in maxillofacial imaging with a new dental computed tomography device", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 96, pp.508~513 (2003)
- Tsiklakis K, "Dose reduction in maxillofacial imaging using low dose cone beam CT", Eur J Radiol, 56, pp.413~417 (2005)
- Swennen GR, "Three-dimensional cephalometry: spiral multi-slice vs cone-beam computed tomography", Am J Orthod Dentofacial Orhtop, 130, pp.410~416 (2006)
- Hechler SL, "Cone-beam CT: applications in orthodontics", Dent Clin North Am, 52, pp.809~823 (2008)
- Farman AG, "ALARA still applies", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 100, pp.395~397 (2005)
- Mah J, "Current status and future needs in craniofacial imaging", Orthod Craniofac Res, 6, pp.179~182 (2003)
- Farman AG, "Development of imaging selection criteria and procedures should precede cephalometric assessment with cone-beam computed tomography", Am J Orthod Dentofacial Orthop, 130, pp.257~265 (2006)
- Moshiri M, "Accuracy of linear measurements from imaging plate and lateral cephalometric images derived from cone-beam computed tomography", Am J Orthod Dentofacial Orthop, 132, pp.550~560 (2007)
- Kumar V, "Comparison of conventional and cone beam CT synthesized cephalograms", Dentomaxillofac Radiol, 36, pp.263~269 (2007)
- van Vlijmen OJ, "Kuijpers-Jagtman AM. Comparison of cephalometric radiographs obtained from cone-beam computed tomography scans and conventional radiographs", J Oral Maxillofac Surg, 67, pp.92~97 (2009)
- 강지영, "Cone-beam CT로부터 제작된 측모 두부계측방사선사진의 정확도 평가", 대한치과교정학회지, 37(6), pp.391~399 (2007), 대한치과교정학회
- Kumar V, "vivo comparison of conventional and cone beam CT synthesized cephalograms", Angle Orthod, 78, pp.873~879 (2008)
- Cattaneo PM, "Comparison between conventional and cone-beam computed tomography-generated cephalograms", Am J Orthod Dentofacial Orthop, 134, pp.798~802 (2008)
- van Vlijmen OJ, "Swennen GR, Katsaros C, Kuijpers-Jagtman AM. A comparison of frontal radiographs obtained from cone beam CT scans and conventional frontal radiographs of human skulls", Int J Oral Maxillofac Surg, 38, pp.773~778 (2009)
- Kim EH, "The validity of Head Posture Aligner in posteroanterior cephalometry", Korean J Orthod, 30, pp.543~552 (2000)
- Hwang HS, "Ear plug for forming reference axis in CT taking. Korean Patent 10-0884354", ~ (2009)
- Dahlberg G, "Statistical methods for medical and biological students", pp.122~132 (1940), George Allen & Unwin Ltd.
- Scarfe WC, "Clinical applications of cone-beam computed tomography in dental practice", J Can Dent Assoc, 72, pp.75~80 (2006)
- Cattaneo PM, "The use of cone-beam computed tomography in an orthodontic department in between research and daily clinic", World J Orthod, 9, pp.269~282 (2008)
- Showfety KJ, "A simple method for taking natural-head-position cephalograms", Am J Orthod, 83, pp.495~500 (1983)