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Accuracy of three-dimensional cephalograms generated using a biplanar imaging system
Ha-Yeon Park, Jae-Seo Lee, Jin-Hyoung Cho, Hyeon-Shik Hwang, Kyung-Min Lee 대한치과교정학회 The Korean Journal of Orthodontics 12 Pages
대한치과교정학회 The Korean Journal of Orthodontics 2018, 제 48권 제 5호 3 292-303 (12 pages)
J Orthod 2018;48(5):292-303] Key words: Three-dimensional cephalogram, Cephalometry, Biplanar radiography, Cone-beam computed tomography Ha-Yeon Park a Jae-Seo Lee b Jin-Hyoung Cho a Hyeon-Shik Hwang a Kyung-Min Lee a aDepartment of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea bDepartment of Radiology, School of Dentistry, Chonnam National University,... Objective: Biplanar imaging systems allow for simultaneous acquisition of lateral and frontal cephalograms. The purpose of this study was to compare measurements recorded on three-dimensional (3D) cephalograms constructed from two-dimensional conventional radiographs and biplanar radiographs generated using a new biplanar imaging system with those recorded on conebeam computed tomography (CBCT)-generated cephalograms in order to evaluate the accuracy of the 3D cephalograms generated using the... -
CEPHALOMETRIC STUDY OF OBSTRUCTIVE SLEEP APNEA PATIENTS IN THE UPRIGHT AND SUPINE POSITIONS
Jong-Chul Kim, Alan A Lowe 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1995, 제 25권 제 6호 1 655-664 (10 pages)
J L, Ferretti G, Veale D, Romand P，Coulomb M, Brambilla C，Levy PA - Somnofluoroscopy, computed tomography, and cephalometry in the assessment of the airway in obstructive sleep apnea. Thorax, 47 : 150-156 ， 1992. 34. Fouke J M, Strohl K P : Effect of position and lung volume on upper airway geometry. J. Appi PhysioL, 63 ⑴ : 375-380，1987. 35. Lowe A A，Fleetham J A : Two- and Three-Dimen... Sixty male patients with polysomnographically documented OSA were included in this study. A pair of cephalograrns were obtained in the upright and supine positions. In the supine position, the ANB angle, lower facial height and the cross-sectional area of soft palate increased and there was a decrease in the vertical airway length and oropharynx cross-sectional area. Positional changes did not affect the cross-sectional area of tongue, but the cross-sectional area of the oropharynx decreased in... -
비대칭 분석시 3차원영상의 정확성에 관한 정보 두부방사선사진과의 비교연구
조홍규, Cho. Hong-Kyu 대한치과기공학회 대한치과기공학회지 12 Pages
대한치과기공학회 대한치과기공학회지 2001, Vol.23 No.1 95-106 (12 pages)
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3차원 두부방사선규격사진의 정확성에 관한 연구
배기선(Gi-Sun BAE), 박수병(Soo-Byung Park), 손우성(Woo-Sung Son) 대한치과교정학회 The Korean Journal of Orthodontics 12 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1997, 제 27권 제 1호 11 129-140 (12 pages)
location of reference points in three dimensions for radiographic cephalometry. Am. J. Orthod. Dentofac. Orthop. 95:490-498 ; 1989. 14. Grayson, B.，Cutting, C., Bookstein, F.，Kim, H . and M c Carthy, J. ： The three-dimensional cephalogram : Theory, technique, and clinical application. Am. J. Orthod. Dentofac. Orthop. 94:327 337 ;1988. 15. Trocme, M.，Sather, H. and An, K. : A biplanar... 본 연구는 교정 임상에서 흔히 촬영되는 측모와 정모 두부방사선규격사진을 사용하여 3차원적인 두개안면 형태를 재현하였을 때 그 방법의 정확성을 고찰해 보고, 기존의 측모 두부방사선규격사진과 비교하여 어떠한 차이를 보이는지 알아보고자 하였다. 이를 위해 두개안면 골격모형의 3차원 두부방사선규격사진을 형성하고, 선계측과 각도 계측을 시행하였다. 여기서 얻어진 계측치들을 실제 계측치 및 측모 두부방사선규격사진에서의 계측치와 비교하여 다음과 같은 결론을 얻었다. 1. 3차원 두부방사선규격사진의 선 계측 평균 오차는...