Heat-Mitigating Design for MRI-Guided Robotic Catheter Passes Thermal Tests

A novel MRI-guided robotic catheter design demonstrated a maximum temperature rise of only 0.6°C during simultaneous imaging and 1 A actuation, staying within FDA safety limits.

• The catheter design used a 50% duty-cycle dithering technique (10 Hz) and distributed capacitors to suppress resonance and reduce heating.
• Thermal validation in a 3T MRI phantom showed consistent performance across bore positions and no hot spots along the leadwires.

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