Feasibility study for image-guided kidney surgery: Assessment of required intraoperative surface for accurate physical to image space registrations
Feasibility study for image-guided kidney surgery: Assessment of required intraoperative surface for accurate physical to image space registrations
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DOI：
10.1118/1.2969064
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发表时间：
2008-09-01
期刊：
影响因子：
3.8
通讯作者：
Galloway, Robert L.
中科院分区：
文献类型：
--
作者：
Benincasa, Anne B.;Clements, Logan W.;Galloway, Robert L.
应用当前图像引导的软组织手术技术进行肾脏切除术（肾切除术）的一个显著并发症是术中肾脏表面的视野有限。这种有限的视图限制了获得精确的基于表面的配准的充分几何描述表面的能力。作者通过使用肾幻影的两个方向来模拟典型的腹腔镜和开放式部分肾切除术视图，检查了有限视图的影响。基于点的配准，使用刚性附着标记或解剖标记作为基准，作为基于表面的配准的初始对准。激光距离扫描仪（LRS）获得的表面采用刚性迭代最近点算法与幻影图像表面进行配准。每个方向的LRS表面的子集用于鲁棒性测试，以确定表面的哪些部分产生最准确的配准。结果表明，获得准确的配准是总表面百分比和几何表面性质（如曲率）的函数。无论该表面子集的位置如何，都需要大约28%的总表面。然而，当表面子集包含来自表面两端和/或独特解剖特征（如肾动脉和静脉）的信息时，该百分比降低。(C) 2008年美国医学物理学家协会。
A notable complication of applying current image-guided surgery techniques of soft tissue to kidney resections (nephrectomies) is the limited field of view of the intraoperative kidney surface. This limited view constrains the ability to obtain a sufficiently geometrically descriptive surface for accurate surface-based registrations. The authors examined the effects of the limited view by using two orientations of a kidney phantom to model typical laparoscopic and open partial nephrectomy views. Point-based registrations, using either rigidly attached markers or anatomical landmarks as fiducials, served as initial alignments for surface-based registrations. Laser range scanner (LRS) obtained surfaces were registered to the phantom's image surface using a rigid iterative closest point algorithm. Subsets of each orientation's LRS surface were used in a robustness test to determine which parts of the surface yield the most accurate registrations. Results suggest that obtaining accurate registrations is a function of the percentage of the total surface and of geometric surface properties, such as curvature. Approximately 28% of the total surface is required regardless of the location of that surface subset. However, that percentage decreases when the surface subset contains information from opposite ends of the surface and/or unique anatomical features, such as the renal artery and vein. (C) 2008 American Association of Physicists in Medicine.