MRI-Compatible Intensity-Modulated Force Sensor for Cardiac Catheterization Procedures
MRI-Compatible Intensity-Modulated Force Sensor for Cardiac Catheterization Procedures
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DOI：
10.1109/tbme.2010.2095853
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发表时间：
2011-03-01
影响因子：
4.6
通讯作者：
Althoefer, Kaspar
中科院分区：
文献类型：
--
作者：
Polygerinos, Panagiotis;Ataollahi, Asghar;Althoefer, Kaspar
本文介绍了一种新的，磁共振成像（MRI）兼容，力传感器适用于心导管手术。微型光纤传感器与导管的尖端集成，以允许检测与心脏壁的相互作用力。当作用在导管尖端处的力使弹性元件变形时，光纤光强度被调制，这又改变反射器与光纤之间的距离。头端传感器的外径为9 Fr（3 mm），可在心导管插入术过程中使用。该传感器能够测量0-0.85 N范围内的力，滞后相对较小。使用非线性方法进行校准，并进行实时MRI体内实验，以证明这种低成本传感器的可行性，使动态条件下的导管尖端接触力的检测。
This paper presents a novel, magnetic resonance imaging (MRI)-compatible, force sensor suitable for cardiac catheterization procedures. The miniature, fiber-optic sensor is integrated with the tip of a catheter to allow the detection of interaction forces with the cardiac walls. The optical fiber light intensity is modulated when a force acting at the catheter tip deforms an elastic element, which, in turn, varies the distance between a reflector and the optical fiber. The tip sensor has an external diameter of 9 Fr (3mm) and can be used during cardiac catheterization procedures. The sensor is able to measure forces in the range of 0-0.85 N, with relatively small hysteresis. A nonlinear method for calibration is used and real-time MRI in vivo experiments are carried out, to prove the feasibility of this low-cost sensor, enabling the detection of catheter-tip contact forces under dynamic conditions.