College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, Zhejiang 310027, China.
Comput Med Imaging Graph. 2011 Jun;35(4):324-32. doi: 10.1016/j.compmedimag.2011.02.001. Epub 2011 Mar 3.
Accurate and fast fusion and display of real-time images of anatomy and associated data is critical for effective use in image guided procedures, including image guided cardiac catheter ablation. We have developed a piecewise patch-to-model matching method, a modification of the contractive projection point technique, for accurate and rapid matching between an intra-operative cardiac surface patch and a pre-operative cardiac surface model. Our method addresses the problems of fusing multi-modality images and using non-rigid deformation between a surface patch and a surface model. A projection lookup table, K-nearest neighborhood search, and a final iteration of point-to-projection are used to reliably find the surface correspondence. Experimental results demonstrate that the method is fast, accurate and robust for real-time matching of intra-operative surface patches to pre-operative 3D surface models of the left atrium.
准确、快速地融合和显示解剖结构及相关数据的实时图像对于在图像引导手术（包括图像引导心脏导管消融术）中的有效应用至关重要。我们开发了一种分段补丁到模型匹配方法，这是收缩投影点技术的一种改进，用于在术中心脏表面补丁和术前心脏表面模型之间进行准确、快速的匹配。我们的方法解决了融合多模态图像和使用表面补丁和表面模型之间的非刚体变形的问题。使用投影查找表、K-最近邻搜索和最后一次点到投影的迭代来可靠地找到表面对应关系。实验结果表明，该方法对于将术中表面补丁实时匹配到左心房的术前 3D 表面模型非常快速、准确和鲁棒。
