激光扫描在面部畸形三维重建及测量中的初步应用 - 北京大学智能科学系.pdf

( ) 口腔医学2005 年 12 月 第 25 卷第 6 期 　Stomatology , Vol25 ,No6 ,Dec2005 3·45 · 临 床 研 究 激光扫描在面部畸形三维重建及测量中的初步应用 1 2 2 2 2 3 3 刘 　林 , 许天民 ,张 　益 ,高 　涛 ,王 　勇 , 查红彬 ,冯 　洁 [摘要] 　目的 　开发建立一套面部三维结构重建、测量及诊断分析系统。方法 　应用系统建立标准石膏立方体试件以及石 膏头像三维计算机模型并进行定点、测量 ,测量值与标准值比较获得系统建模误差以及定点误差范围 ;2 例面部畸形患者进行 了面部三维扫描建模 ,应用系统对患者面部计算机模型进行了定点、线距、角度测量以及初步对称性分析。结果 　三维计算机 模型的建模误差在 0. 2 mm 以内,定点误差在 0. 5 mm 以内。应用本系统可以完成三维计算机模型的定点、线距、角度测量及对 称性分析工作 ,基本能够达到临床要求。结论 　三维激光扫描技术为颌面部畸形患者面部软组织三维结构重建和非接触式测 量提供了一种简便、精确、高效的方法。 [ 关键词] 　激光扫描 ; 面部畸形 ; 三维重建 ; 测量 ( ) [ 中图分类号] 　R445. 9 　　[文献标识码] 　A 　　[文章编号] 2005 Initial application of laser scanning for threedimensional reconstruction and anthropometrics of facial deformity LIU Lin , XU Tianmin , ZHANG Yi , GAO Tao , WANG Yong , ZHA Hongbin , FENG Jie . ( Department of Stomatology , Beijing Zhaoyang ) Hospital , Beijing 100043, China Abstract : 　Objective 　To develop a system for threedimensional reconstruction , anthropometrics and evaluation of facial deformity. Meth ods 　To build threedimensional models of standard plaster objects (a cube and a head sculpture) and take measurements of them by this sys tem. The results acquired from the measurements were compared with those already known to get the system’s errors. Two patients with facial deformity were scanned and threedimensional facial models were built using this system. The characteristics of the deformity were analyzed through those models. Results 　The threedimensional model building error is less than 0. 2 mm and the landmark locating error is less than 0. 5 mm , which are basically up to the clinical standards