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MRI-compatible intensity-modulated force sensor for cardiac catheterization procedures.

Panagiotis Polygerinos1, Asghar Ataollahi, Tobias Schaeffter

  • 1Department of Mechanical Engineering, King’s College London, London, WC2R 2LS, UK. panagiotis.polygerinos@kcl.ac.uk

IEEE Transactions on Bio-Medical Engineering
|December 2, 2010
PubMed
Summary
This summary is machine-generated.

A new magnetic resonance imaging (MRI)-compatible fiber-optic force sensor for cardiac catheterization detects catheter-tip contact forces. This miniature sensor enables real-time MRI in vivo measurements during procedures.

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Cardiovascular Technology

Background:

  • Cardiac catheterization procedures require precise force measurement.
  • Existing sensors may lack MRI compatibility or miniaturization.
  • Accurate detection of catheter-tip forces is crucial for patient safety and procedural success.

Purpose of the Study:

  • To develop and validate a novel MRI-compatible fiber-optic force sensor for cardiac catheterization.
  • To enable real-time detection of catheter-tip interaction forces with cardiac walls.
  • To demonstrate the feasibility of a low-cost sensor for dynamic force measurements.

Main Methods:

  • Integration of a miniature fiber-optic sensor at the catheter tip (9 Fr/3 mm diameter).
  • Utilizing light intensity modulation due to deformation of an elastic element by applied force.
  • Nonlinear calibration method and real-time in vivo experiments using MRI.

Main Results:

  • The sensor successfully measures forces in the range of 0-0.85 N with minimal hysteresis.
  • Demonstrated feasibility of real-time MRI in vivo measurements.
  • The sensor effectively detects catheter-tip contact forces under dynamic conditions.

Conclusions:

  • A novel, MRI-compatible, fiber-optic force sensor is feasible for cardiac catheterization.
  • The sensor provides real-time, low-cost detection of catheter-tip forces.
  • This technology has the potential to enhance safety and precision in cardiac procedures.