1. MRI-Compatible Intensity-Modulated Force Sensor for Cardiac Catheterization Procedures.
- Author
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Polygerinos, Panagiotis, Ataollahi, Asghar, Schaeffter, Tobias, Razavi, Reza, Seneviratne, Lakmal D., and Althoefer, Kaspar
- Subjects
CARDIAC magnetic resonance imaging ,TACTILE sensors ,CARDIAC catheterization ,OPTICAL fiber detectors ,NONLINEAR theories ,PROTOTYPES - Abstract
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 (3 mm) 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. [ABSTRACT FROM PUBLISHER]
- Published
- 2011
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