Development of three dimensional postoperative feature prediction method with multi-modal registration

多模态配准三维术后特征预测方法的开发

• 批准号: 10470431
• 负责人: MORI Yoshihide
• 金额: $ 1.86万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10470431/
• 关键词: oral and maxillo-facial region; three dimensional measurement; jaw deformity; postoperative feature prediction; multidimensional analysis

1. Registration of multi-modal 3D dataWe developed a system which realized total measurement of oral and maxillo-facial region. In the system, 3D-CT data of cranium, surface data of dental casts obtained by range finder (SURFRACER) were registered on a three dimensional coordinate system constructed from frontal and lateral cephalograms. In addition, surface data of facial soft tissue from crystal range finder could be added to the coordinate system. Moreover, we showed that 3D (surface) data of dental cast could be superimposed directly on the 3D-CT data of cranium.2. Definition of landmark points of hard and soft tissue based on feature predictionAs landmarks of facial soft tissue and facial bone are close to midline, it was hard to find landmark points on the lateral part of the face. Then, we decide central point on the coronal section of CT, gave additional radial lines from it, and defined paired landmarks of soft and hard tissue. We measured 3D-CT data obtained from 9 patients with mandibular protrusion (without asymmetry) before and after operation. According to the movement of dental arch, we calculated moving matrix of hard tissue.3. Analysis of soft tissue movementWe analyzed the movement of corresponded soft tissue by multidimensional analysis. Then, we showed that the soft tissue movement was expressed as a numerical formula.

1. 多模态三维数据配准开发了一套实现口腔颌面区域整体测量的系统。在该系统中，由测距仪（SURFRACER）获得的头盖骨3D-CT数据、牙模表面数据被注册到由正面和侧面头颅图像构建的三维坐标系上。此外，还可以将晶体测距仪采集的面部软组织表面数据加入到坐标系中。此外，我们发现牙模的3D（表面）数据可以直接叠加在颅骨的3D- ct数据上。基于特征预测的硬软组织和软组织地标点定义由于面部软组织和面部骨骼的地标点靠近中线，很难在面部外侧找到地标点。然后，我们在CT冠状面上确定中心点，在此基础上给出附加的径向线，并定义软组织和硬组织的成对标志。我们测量了9例下颌前突（无不对称）患者手术前后的3D-CT数据。根据牙弓的运动情况，计算出硬组织的运动矩阵。软组织运动分析采用多维分析方法分析相应软组织的运动情况。然后，我们将软组织运动用数值公式表示。

项目成果

Kwon,T.G., et al: "Stability of simultaneous maxillary and mandibular osteotomy for treatment of class III malocclusion : an analysis of three-dimensional cephalograms"J.Cranio Maxillofac, Surg,. (印刷中). (2001)

Kwon, T.G. 等人：“治疗 III 类咬合不正的同步上颌骨和下颌骨截骨术的稳定性：三维头颅照片分析”J.Cranio Maxillofac, Surg,（印刷中）。

Kwon, T.G., Mori, Y., Minami, K., Lee, S.H., Sakuda, M.: "Stability of simultaneous maxillary and mandibular osteotomy for treatment of class III malocclusion : an analysis of three-dimensional cephalograms"J.Cranio Maxillofac. Surg.. 28(in press). (2000)

Kwon, T.G.、Mori, Y.、Minami, K.、Lee, S.H.、Sakuda, M.：“上颌骨和下颌骨同时截骨术治疗 III 类错牙合畸形的稳定性：三维头颅照片分析”J.Cranio Maxillofac

Yamada,T., et al: "Rapid Three-Dimensional Measuring System for Facial Surface Structure"Plastic and Reconstructive Surgery. 102. 2108-2113 (1998)

Yamada,T. 等人：“面部表面结构快速三维测量系统”整形与重建外科。

清水英孝、他: "統合3次元データによる顎矯正手術シミュレーションシステムの開発-第1報 モデル作製法および術式に即した骨切り法の開発-"医用電子と生体工学. 37Suppl.. 280-280 (1999)

Hidetaka Shimizu 等人：“使用集成 3D 数据开发颌骨正颌手术模拟系统 - 第 1 部分：根据手术程序开发模型准备方法和截骨方法 -”《医疗电子和生物工程》37Suppl.. 280-280（ 1999）

Mori, Y., Miyajima, T., Minami, K., Sakuda, M.: "An accurate three- dimensional cephalometric system -A solution for the correction of cephalic malpositioning"J.Orthodontics. (in press). (2001)

Mori, Y.、Miyajima, T.、Minami, K.、Sakuda, M.：“精确的三维头影测量系统 - 纠正头颅错位的解决方案”J.Orthodontics。