基于二维DR的颅面硬组织与软组织拟合的研究

目的:以数字化X线摄影片(digital radiograph,DR)图像和激光扫描为数据源,三维重建颅面硬组织和软组织,并进行硬软组织的有效拟合,以期为治疗方案确定、手术方法选择和提高医患交流的水平提供平台.方法:在志愿者面部贴定铅点,拍摄头颅正侧位DR片.利用基于二维DR数据的颅面硬组织三维重建系统进行硬组织形变建模.获得颅面部硬组织模型.利用激光扫描数据进行面部软组织三维重建,获得面部软组织三维模型.然后通过铅点坐标的匹配,将颅面硬组织与面部软组织进行拟合.结果:分别重建了能反映真实颅面部组织结构的硬组织三维模型和面部软组织三维模型,并实现了颅面部硬组织与软组织的有效拟合.结论:本研究实现了颅颌面三维结构的有效重建和拟合,为进一步进行正颌手术模拟和容貌预测奠定了基础.拟合结果真实可靠,能够用于临床.

Fitting of the reconstructed craniofacial hard and soft tissues based on 2-D digital radiographs

PURPOSE:In this study,we reconstructed the craniofacial hard and soft tissues based on the data from digital cephalometric radiographs and laser scanning.The effective fitting of the crauiofacial hard and soft tissues was performed in order to increase the level of orthognathic diagnosis and treatment,and promote the communication between doctors and patients.METHODS:A small lead point was put on the face of a volunteer and frontal and lateral digital cephalometric radiographs were taken.3-D reconstruction system of the craniofacial hard tissue based on 2-D digital radiograph was used to get the craniofacial hard tissue model by means of hard tissue deformation modeling.3-D model of facial soft tissue was obtained by using laser scanning data.By matching the lead point coordinate,the hard tissue and soft tissue were fitted.RESULTS:The 3-D model of the craniofacial hard and soft tissues was rebuilt reflecting the real craniofacial tissue structure,and effective fitting of the craniofacial hard and soft tissues was realized.CONCLUSIONS:The effective reconstruction and fitting of the 3-D craniofacial structures have been realized,which lays a foundation for further orthognathic simulation and facial appearance prediction.The fitting result is reliable,and could be used in clinical practice.