摘要
在骨科术前规划中,三维碎骨表面分割有助于医生精确规划手术范围,制定合适的治疗方案。传统手工分割方法借助三维数字化软件,操作复杂且耗时较长,不能高效满足医生术前规划实际需求。针对以上问题,提出一种基于区域生长的三维碎骨分割方法。首先,该方法以碎骨三角网格模型为分割对象,通过人工交互选取种子点;其次,以曲率差值作为生长条件合并相似属性网格顶点;然后,通过人为判断碎骨平滑边缘,交互式选择分割终止线,减少过生长现象;最后,通过后处理填补分割漏洞,解决区域生长不足、覆盖率低的问题,提高碎骨分割精确度。将该方法与医生手工分割作比较,实验结果证明,该方法能满足临床医学术前规划实际需求,有效提高骨折术前规划效率。
In preoperative planning of orthopedics,three-dimensional bone surface segmentation helps doctors to accurately plan the scope of surgery and develop appropriate treatment plans.The traditional manual segmentation method is complicated and time-consuming to operate with three-dimensional digital software,which cannot effectively meet the actual needs of doctor before surgery.In order to solve the problem,a method based on region growing for three-dimensional bone segmentation was proposed.In this method,the broken bone triangle mesh model was used as the segmentation object,and the seed points were selected by artificial interaction;the curvature difference was used as the growth condition to merge the similar attribute mesh vertices;smooth edges of broken bones were judged artificially,and segmentation termination lines were selected interactively to reduce over-growth phenomenon;through post-processing to fill the segmentation loopholes,the problem of insufficient regional growth and low coverage was solved,and the accuracy of bone segmentation was improved.The method was compared with the doctor s manual segmentation,and the experimental results show that the method can meet the actual needs of preoperative planning in clinical medicine and effectively improve the planning efficiency of fracture before surgery.
作者
孙晓莉
蒋俊锋
黄瑞
陈正鸣
SUN Xiaoli;JIANG Junfeng;HUANG Rui;CHEN Zhengming(College of Internet of Things Engineering,Hohai University,Changzhou Jiangsu 213022,China;Changzhou Key Laboratory of Graphics,Images and Orthopedic Implants,Changzhou Jiangsu 213022,China;College of Computer and Information,Hohai University,Nanjing Jiangsu 210000,China)
出处
《计算机应用》
CSCD
北大核心
2019年第S02期199-205,共7页
journal of Computer Applications
基金
国家自然科学基金资助项目(61772172,51605142,61472118)
江苏省自然科学基金资助项目(BK20181158)
中央高校基本科研业务费专项资金资助项目(2018B59814)
关键词
三维模型
碎骨分割
区域生长
计算机辅助术前规划
离散曲率
three-dimensional model
broken bone segmentation
regional growth
computer-assisted preoperative planning
discrete curvature
