基于螺旋CT扫描图像的人牙齿的计算机三维重建  

Three-dimensional Rebuilding of Human Tooth Based on the Digital Images by Spiral CT

作　　者：郭宁山[1] 冯晓刚[2] 王乐[3] 

机构地区：[1]广州军区机关门诊部口腔科,广东广州510080 [2]南方医科大学生物医学工程学院,广东广州510515 [3]西北工业大学医院外科,陕西西安710072

出　　处：《中国医学物理学杂志》2011年第4期2764-2766,2783,共4页Chinese Journal of Medical Physics

摘　　要：目的:研究基于螺旋CT扫描图像的人牙齿的计算机三维重建。方法:采用美国PQ6000型螺旋CT扫描机,自下颌颏部下缘开始至鼻骨底做连续横断超薄扫描,得到了人牙齿的二维CT图像。应用图像处理与识别合成软件,读取二维CT图像数据文件,通过灰度分割方法对二维图像进行边缘提取,再利用三维表面重建算法对所截取的二维CT图像进行三维重建,最终获得人牙齿的三维重建影像。结果:获得的人牙齿三维重建影像,细致逼真、可被任意旋转、剖开、透视、截取,从不同角度观察重建影像形态还原性良好、重建效果满意。结论:基于螺旋CT扫描图像的人牙齿的计算机三维重建,可为有限元实体建模提供快捷、方便的方法。Objective: To study the rebuilding method of human tooth based on the digital images by spiral CT.Methods: By the PQ6000 spiral CT,successive cross-sectional scanning was made from the inferior edge of the mandibular chin to the bottom of the nasal bone to obtain the two-dimensional digital images.Using the image processing and recognition software,two-dimensional CT image data file was established.Two-dimensional gray image segmentation method was adopted for edge detection.Further,three-dimensional surface reconstruction algorithm was used for the three-dimensional reconstruction by intercepted two-dimensional image.Results: Three-dimensional image of human tooth was obtained,which was rather vivid in every detail,and could be rotated,dissected,perspected,and intercepted optionally.It made the observation of images from different angles as possible.The reconstruction showed satisfactory replicating effects.Conclusions: Three-dimensional reconstruction of the human tooth by digital scanning of spiral CT can provide us a convenient and fast method for finite element model establishment.

关 键 词：螺旋CT 牙齿 三维 

分 类 号：R312[医药卫生—基础医学]