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Related Experiment Video

Updated: Jun 6, 2026

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Published on: April 4, 2013

Catheter steering using a Magnetic Resonance Imaging system.

Viviane Lalande¹, Frederick P Gosselin, Sylvain Martel

¹NanoRobotics laboratory, École Polytechnique de Montréal (EPM), Canada. viviane.lalande@polymtl.ca

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|November 25, 2010

Summary

Magnetic fields can precisely steer and bend catheters with ferromagnetic spheres at their tips. Sphere interactions within the magnetic field dictate catheter movement, a behavior explained by a dipole interaction model.

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Area of Science:

Medical Devices
Biophysics
Robotics

Background:

Catheter-based interventions are crucial in modern medicine.
Precise control of catheter navigation remains a significant challenge.
Magnetic Resonance Imaging (MRI) offers a unique environment for device manipulation due to its strong magnetic fields.

Purpose of the Study:

To investigate the feasibility of magnetically steering a catheter within an MRI system.
To explore the relationship between ferromagnetic sphere configurations and catheter displacement.
To develop a predictive model for catheter behavior under magnetic load.

Main Methods:

A catheter was equipped with one to three soft ferromagnetic spheres at its distal tip.
Magnetic gradients were applied within an MRI system to induce catheter movement.
Observed displacement patterns were recorded and analyzed.
A theoretical dipole interaction model was developed and compared to experimental results.

Main Results:

Successful bending and steering of the catheter were achieved using magnetic gradients.
The spacing and number of ferromagnetic spheres influenced the catheter's displacement.
Both progressive and discontinuous (jumping) movements were observed based on magnetic load and sphere interactions.
The experimental observations were accurately predicted by the theoretical dipole interaction model.

Conclusions:

Magnetic steering of catheters within MRI systems is a viable technique.
The behavior of ferromagnetic spheres is key to controlling catheter motion.
A simple dipole interaction model effectively explains the observed complex displacement phenomena, paving the way for advanced catheter control.