Point-based surface best fit 알고리즘을 이용한 디지털 치아 모형과 3차원 CT 영상의 중첩 정확도
IMAGE FUSION ACCURACY FOR THE INTEGRATION OF DIGITAL DENTAL MODEL AND 3D CT IMAGES BY THE POINT-BASED SURFACE BEST FIT ALGORITHM
김봉철, 이충국, 강정완, 박원서, 이상휘, 이채은,
소속 상세정보
김봉철 ( Kim Bong-Chul ) - 육군 제6 보병사단 의무근무대
이충국 ( Yi Choong-Kook ) - 연세대학교 치과대학 구강악안면외과학교실
강정완 ( Kang Jeong-Wan ) - 연세대학교 치과대학 구강악안면외과학교실
박원서 ( Park Won-Se ) - 연세대학교 치과대학 구강악안면외과학교실
이상휘 ( Lee Sang-Hwy ) - 연세대학교 치과대학 구강악안면외과학교실
이채은 ( Lee Chae-Eun ) - 연세대학교 치과대학 구강악안면외과학교실
KMID : 0355620080340050555
Abstract
Purpose: The goal of this study was to develop a technique for creating a computerized composite maxillofacial-dental model, based on point-based surface best fit algorithm and to test its accuracy. The computerized composite maxillofacial-dental model was made by the three dimensional combination of a 3-dimensional (3D) computed tomography (CT) bone model with digital dental model.
Materials and Methods: This integration procedure mainly consists of following steps : 1) a reconstruction of a virtual skull and digital dental model from CT and laser scanned dental model ; 2) an incorporation of dental model into virtual maxillofacial-dental model by point-based surface best fit algorithm; 3) an assessment of the accuracy of incorporation. To test this system, CTs and dental models from 3 volunteers with cranio-maxillofacial deformities were obtained. And the registration accuracy was determined by the root mean squared distance between the corresponding reference points in a set of 2 images.
Results and Conclusions: Fusion error for the maxillofacial 3D CT model with the digital dental model ranged between 0.1 and 0.3 mm with mean of 0.2 mm. The range of errors were similar to those reported elsewhere with the fiducial markers. So this study confirmed the feasibility and accuracy of combining digital dental model and 3D CT maxillofacial model. And this technique seemed to be easier for us that its clinical applicability can good in the field of digital cranio-maxillofacial surgery.
키워드
Computed tomography;Image fusion;Optical 3D imaging;Error;Accuracy
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