Photo-consistency registration of a 4D cardiac motion model to endoscopic video for image guidance of robotic coronary artery bypass

Photo-consistency registration of a 4D cardiac motion model to endoscopic video for image guidance of robotic coronary artery bypass
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4D 心脏运动模型与内窥镜视频的照片一致性配准,用于机器人冠状动脉搭桥的图像引导

DOI:
10.1117/12.813905
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发表时间:
2009
期刊:
--
影响因子:
--
通讯作者:
Figl M
Figl M
中科院分区:
--
文献类型:
--
作者:
Figl M

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本文描述的工作的目的是通过术中内窥镜将术前心脏的4D运动模型配准到患者的视频视图。心脏运动是周期性的,可以使用心脏门控冠状动脉CT的多次重建来模拟。我们建议使用通过达芬奇内窥镜的两个切面之间的照片一致性来对准来自CT的术前心脏表面模型。从视频到CT模型的时间对准原则上可以从心电信号中获得。我们建议对心脏周期内的光一致性进行平均,以改善与单视图相比的配准。虽然心脏有相当大的运动,但在正确的时间对齐之后,我们建议剩余的运动应该接近刚性。给出了模拟渲染和心脏跳动模型的真实视频的结果。当使用多个阶段进行配准时,我们发现最小的平滑截面,此外,当使用更多的阶段时,收敛被发现更好。
The aim of the work described in this paper is registration of a 4D preoperative motion model of the heart to the video view of the patient through the intraoperative endoscope. The heart motion is cyclical and can be modelled using multiple reconstructions of cardiac gated coronary CT. We propose the use of photoconsistency between the two views through the da Vinci endoscope to align to the preoperative heart surface model from CT. The temporal alignment from the video to the CT model could in principle be obtained from the ECG signal. We propose averaging of the photoconsistency over the cardiac cycle to improve the registration compared to a single view. Though there is considerable motion of the heart, after correct temporal alignment we suggest that the remaining motion should be close to rigid. Results are presented for simulated renderings and for real video of a beating heart phantom. We found much smoother sections at the minimum when using multiple phases for the registration, furthermore convergence was found to be better when more phases are used.
DOI: 10.1109/tmi.2005.853639
发表时间: 2005-09-01
影响因子: 10.6
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