CBCT 重建模型的评估和校准。
Evaluation and Calibration of CBCT Reconstruction Models.
机构信息
Dental Department, Beijing Jishuitan Hospital, Beijing, China.
Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology; National Center of Stomatology; National Clinical Research Center for Oral Diseases; National Engineering Laboratory for Digital and Material Technology of Stomatology; NHC Research Center of Engineering and Technology for Digital Dentistry; Beijing Key Laboratory of Digital Stomatology, Beijing, China.
出版信息
Curr Med Imaging. 2023;19(12):1449-1454. doi: 10.2174/1573405619666230217121745.
PURPOSE
This study proposes a method for improving the accuracy of three-dimensional (3D) models generated through cone-beam computed tomography (CBCT).
METHODS
A 3D cuboid model fitted with a ¼-scale dentition on its top surface was constructed to simulate an alveolar bone with teeth. A physical specimen of the model was printed and the distance between its opposite sides was measured using a vernier caliper. The physical model was light-scanned, and the surface data of the generated 3D model were corrected by calibrating the distance between opposite sides against the vernier caliper measurements. The physical model was also scanned using CBCT to reconstruct a second 3D model. The overall deviation between the two models and the distance deviation in each direction of the cuboid and dentition were quantified and statistically analyzed.
RESULTS
The overall deviation between the reconstructed CBCT model and the calibrated structured light-scanned model was 0.098 ± 0.001 mm. Following calibration, the overall deviation was 0.010 ± 0.006 mm. A one-way variance analysis suggested that the overall deviations' differences were not statistically significant (P < 0.05).
CONCLUSION
This study lays a solid foundation for accurate dental implantation.
目的
本研究提出了一种提高通过锥形束 CT（CBCT）生成的三维（3D）模型准确性的方法。
方法
构建了一个 3D 长方体模型，其顶部表面配有四分之一比例的牙齿，以模拟牙槽骨和牙齿。打印模型的物理标本，并使用游标卡尺测量其相对侧之间的距离。对物理模型进行光扫描，并通过校准游标卡尺测量值与相对侧之间的距离来校正生成的 3D 模型的表面数据。该物理模型还使用 CBCT 进行扫描，以重建第二个 3D 模型。对两个模型之间的整体偏差以及长方体和牙齿各个方向的距离偏差进行量化和统计分析。
结果
重建的 CBCT 模型与校准的结构光扫描模型之间的整体偏差为 0.098 ± 0.001mm。校准后，整体偏差为 0.010 ± 0.006mm。单向方差分析表明，整体偏差的差异没有统计学意义（P < 0.05）。
结论
本研究为精确的牙科植入奠定了坚实的基础。
Zotero 插件