MRI-Compatible Intensity-Modulated Force Sensor for Cardiac Catheterization Procedures

作者：Polygerinos Panagiotis^*; Ataollahi Asghar; Schaeffter Tobias; Razavi Reza; Seneviratne Lakmal D; Althoefer Kaspar

来源：IEEE Transactions on Biomedical Engineering, 2011, 58(3): 721-726.

DOI：10.1109/TBME.2010.2095853

• Cardiac catheterization
• fiber-optic force sensor
• force sensor
• light intensity modulation
• magnetic resonance imaging (MRI)-compatible

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.

• 出版日期2011-3