归一化互信息与多分辨率融合的2D-3D配准方法  

A 2D-3D registration method based on normalized mutual information and multi-resolution fusion

作　　者：陈龙 张峰峰[1,2] 于凌涛 孙立宁[1,2] 干旻峰[4] 詹蔚 CHEN Long;ZHANG Fengfeng;YU Lingtao;SUN Lining;GAN Minfeng;ZHAN Wei(School of Mechanical and Electric Engineering,Soochow University,Suzhou 215006,China;Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215123,China;School of Mechanical and Electric Engineering,Harbin Engineering University,Harbin 150001,China;The First Affiliated Hospital of Soochow University,Suzhou 215000,China)

机构地区：[1]苏州大学机电工程学院,江苏苏州215006 [2]苏州大学苏州纳米科技协同创新中心,江苏苏州215123 [3]哈尔滨工程大学机电工程学院,黑龙江哈尔滨150001 [4]苏州大学附属第一医院,江苏苏州215000

出　　处：《哈尔滨工程大学学报》2020年第2期243-249,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划资助(2018YFB1307700)

摘　　要：针对微创脊柱手术配准环节中存在的配准精度和效率低的问题,本文提出了一种2D-3D配准方法。采用基于区域贡献的归一化互信息与多分辨率策略相结合的方法,并通过改变配准步长,研究配准精度和时间。整体配准精度提高了40%,配准时间缩短了53%,当配准步长由0.1降到0.05时,其配准精度提高了8%,配准时间增加了12%。由此可知,配准步长变小时,配准精度相对提高,但配准时间增加。此算法可以实现三维与二维图像的配准,且可以有效提高配准精度和配准效率,基本符合医生手术过程图像配准3 mm以内的需要。To address the problems of registration accuracy and low efficiency in the registration of minimally invasive spine surgery, a new two-dimensional-three-dimensional(2 D-3 D) registration method is proposed. A method based on the regional contribution of normalized mutual information combined with multi-resolution strategy is used. The registration accuracy and registration time are analyzed by changing the registration step size. The overall registration accuracy has been increased by 40% and the registration time has been decreased by 53%. When the registration step size is decreased from 0.1 to 0.05, the registration accuracy is increased by 8% and the registration time is increased by 12%. Thus, the registration step size is decreased, whereas the registration accuracy and registration time are relatively increased. The algorithm can achieve the registration of 3 D and 2 D images, and can effectively improve the registration accuracy and registration efficiency, which meet the needs of image registration in the surgical procedure of doctors.

关 键 词：2D-3D配准 归一化互信息 多分辨率 相似性测度 光线投射插值 区域分割 微创 灰度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]