CAJ | 학술논문

同时利用CT和MRI图像对膝关节及胫骨疾病进行诊断和治疗,是目前临床上的常规方法.精确配准膝关节胫骨部分三维CT和MRI图像可以更有效地利用这两种图像中的组织信息.目前,基于图像特征或者图像灰度值的方法可以实现图像间的配准,但是都存在一些配准精度低或者时间复杂度高的缺陷.针对膝关节胫骨组织的刚性特征,采用一种基于骨组织表面重建的点云配准方法.首先对数据集进行骨表面重建,通过重建后的结果提取点云数据,对点云数据进行下采样并利用重心进行初始变换,最后利用ICP算法对点云数据进行配准.对该方法进行配准结果分析及配准精度实验,表明这种方法简单可靠并且配准精度较高.
동시이용CT화MRI도상대슬관절급경골질병진행진단화치료,시목전림상상적상규방법.정학배준슬관절경골부분삼유CT화MRI도상가이경유효지이용저량충도상중적조직신식.목전,기우도상특정혹자도상회도치적방법가이실현도상간적배준,단시도존재일사배준정도저혹자시간복잡도고적결함.침대슬관절경골조직적강성특정,채용일충기우골조직표면중건적점운배준방법.수선대수거집진행골표면중건,통과중건후적결과제취점운수거,대점운수거진행하채양병이용중심진행초시변환,최후이용ICP산법대점운수거진행배준.대해방법진행배준결과분석급배준정도실험,표명저충방법간단가고병차배준정도교고.
In order to improve the accuracy of diagnosis or operation on knee and tibia, the registration between CT and MRI 3D images is required in clinical application. Accurate registration can help doctors understand anatomical structures correctly. In order to improve the algorithm for registering CT and MRI images of tibia,this paper proposes a registration method based on surface point cloud of bone. First, surface reconstruction of bone is performed by using the Marching Cubes method,and point clouds are extracted as the reconstructed result. Second,a down sample meth-od is utilized for the point clouds to reduce computational consumption, and the transformation of displacement is esti-mated by using center of gravity. Finally, ICP method is used for point clouds registration. The experimental results show that the proposed method has high registration accuracy and low computational consumption.