基于二维DR数据的颅面硬组织三维重建系统的建立  

Development of 3-D reconstruction system of the craniofacial hard tissue based on 2-D digital radiograph

作　　者：冯耀浦[1,2] 周洪[2] 翟培芳[3] 张艳宁[3] 孙琳琳[1] 

机构地区：[1]宝鸡市口腔医院正畸科,陕西宝鸡721001 [2]西安交通大学口腔医院正畸科,陕西西安710004 [3]西北工业大学.陕西西安710067

出　　处：《上海口腔医学》2010年第5期480-484,共5页Shanghai Journal of Stomatology

摘　　要：目的:以数字化X线摄影片(DR)图像为数据源,在Windows XP平台上,利用VC++6.0、VTK工具研发颅面硬组织三维重建系统,为治疗方案确定、手术方法选择和提高医患交流的水平提供平台。方法:以CT影像为基础构建的头颅作为标准模板,确立其三维坐标系,选取64个特征点,作为初始特征点。调整患者DR,使其与标准模板的坐标系一致。调整DR上的特征点作为目标特征点。根据一定形变算法,对标准模板进行上下颌分离形变、融合,得到患者颅面硬组织模型。结果:重建了能基本反映真实颅面硬组织结构的三维模型,其图像逼真,能够动态旋转,任意缩放。结论:本系统硬组织重建突破常规,分离独立形变后再融合,实现了咬合关系的基本重建,能够应用于临床。PURPOSE：In this study, we used data from digital cephalometric radiograph to develop a 3-D craniofacial reconstruction system.The system was developed by Visual C＋＋6.0, VTK on the platform of Windows XP, to increase the level of orthognathic diagnosis and treatment, and promote the communication between doctors and patients.METHODS：A model based on CT images was established as a standard model.Then the 3-D coordinate system was constructal and 64 feature points were set up as the initial feature points.The digital radiograph of the patient was adjusted to accord coordinate system of the model and regulated the feature points of the frontal and lateral cephalograms were regulated as the target feature points.Based on a certain deformation algorithm, deformed the standard model was deformed according to the feature points established in the digital radiograph, then the model of craniofacial hard tissue in patient was achieved.RESULTS：The 3-D model reflecting the actual surface construction of the craniofacial hard tissue was constructed.The 3-D image of the model constructed was lively and clear, which could be rotated and zoomed arbitrarily.CONCLUSIONS：Separated deformation and then fusion, the hard tissue reconstruction break through convention.Occlusal relation essentially rebuilt is carried out.This system could be used in clinic for diagnosis and operation simulation.

关 键 词：数字化X线摄影片 三维重建 特征点 形变 

分 类 号：R783.5[医药卫生—口腔医学]