Evaluation of a New 3D/2D Registration Criterion for Liver Radio-Frequencies Guided by Augmented Reality
Evaluation of a New 3D/2D Registration Criterion for Liver Radio-Frequencies Guided by Augmented Reality
复制标题
增强现实引导下肝脏射频新 3D/2D 配准标准的评估
DOI：
10.1007/3-540-45015-7_26
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
N. Ayache
中科院分区：
文献类型：
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作者：
S. Nicolau;X. Pennec;L. Soler;N. Ayache
本文的目的是在患者的外部视频图像上显示肝脏，其血管和肿瘤的3D模型（从CT图像重建），用于肝脏手术指导。主要的约束条件是鲁棒性、精度和计算时间。由于没有可见的解剖标志和上腹部的“圆柱形”形状，我们使用了一些不透射线的基准点。经典的最小二乘法假设有没有噪音的3D点的位置，我们设计了一个新的最大似然法来考虑这种现有的噪声，我们表明，它概括了经典的方法。合成数据的实验提供的证据表明，我们的新标准是高达20%更准确和更强大的，同时保持与实时兼容的计算时间在20至40 Hz。最终，对真实的数据的仔细验证实验表明，在肝脏内可以实现2 mm的精度。
Our purpose in this article is to superimpose a 3D model of the liver, its vessels and tumors (reconstructed from CT images) on external video images of the patient for hepatic surgery guidance. The main constraints are the robustness, the accuracy and the computation time. Because of the absence of visible anatomical landmarks and of the “ cylindrical” shape of the upper abdomen, we used some radio-opaque fiducials. The classical least-squares method assuming that there is no noise on the 3D point positions, we designed a new Maximum Likelihood approach to account for this existing noise and we show that it generalizes the classical approaches. Experiments on synthetic data provide evidences that our new criterion is up to 20% more accurate and much more robust, while keeping a computation time compatible with realtime at 20 to 40 Hz. Eventually, careful validation experiments on real data show that an accuracy of 2 mm can be achieved within the liver.