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arXiv 2012.10762cs.ROcs.NAeess.IVmath.NA
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机器人血管导航中基于图像的腔内接触力监测

Image-based Intraluminal Contact Force Monitoring in Robotic Vascular Navigation

McGill University(麦吉尔大学);Concordia University(康考迪亚大学)

Masoud Razban, Javad Dargahi, Benoit Boulet

摘要:

栓塞、卒中、缺血性病变和穿孔仍然是血管内介入治疗的重要问题。血管内感测工具与动脉的相互作用有利于最小化此类并发症并增强导航安全性。由于缺乏血管内接触感测技术,管腔内信息目前有限。我们提出了在血管机器人导航中使用基于图像的估计方法监测管腔内工具与动脉壁的相互作用。所提出的基于图像的方法采用使用成像数据的工具的连续有限元模拟来估计沿着工具-血管壁相互作用的多点力。我们实施了成像算法来检测和跟踪接触并计算姿势测量。该模型是建立在非线性梁单元和弯曲刚度剖面的工具长度的基础上。在主动脉远程插管期间,管腔内监测实现了跟踪局部接触力,构建动脉壁上的力的等值线图并估计工具结构应力。结果表明,即使插入力较低,也可能发生高风险腔内力。所提出的在线监测系统可深入了解血管内工具的腔内行为,非常适合临床医生的术中视觉引导、血管手术的机器人控制和介入器械设计研究。

英文摘要:

Embolization, stroke, ischaemic lesion, and perforation remain significant concerns in endovascular interventions. Intravascular sensing of tool interaction with the arteries is advantageous to minimize such complications and enhance navigation safety. Intraluminal information is currently limited due to the lack of intravascular contact sensing technologies. We present monitoring of the intraluminal tool interaction with the arterial wall using an image-based estimation approach within vascular robotic navigation. The proposed image-based method employs continuous finite element simulation of the tool using imaging data to estimate multi-point forces along tool-vessel wall interaction. We implemented imaging algorithms to detect and track contacts, and compute pose measurements. The model is constructed based on the nonlinear beam element and flexural rigidity profile over the tool length. During remote cannulation of aortic arteries, intraluminal monitoring achieved tracking local contact forces, building a contour map of force on the arterial wall and estimating tool structural stress. Results suggest that high risk intraluminal forces may happen even with low insertion force. The presented online monitoring system delivers insight into the intraluminal behavior of endovascular tools and is well suited for intraoperative visual guidance for the clinician, robotic control of vascular procedures and research on interventional device design.

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