Pacemakers have long been a marvel of medical engineering, but for decades, they had one fatal flaw: MRI machines. Strong magnetic fields and radiofrequency (RF) energy can heat leads, distort images, or cause dangerous malfunctions.
That’s no longer acceptable. Today, engineers must design pacemakers to be MRI-safe, and simulation is their most powerful tool.
The Compatibility Challenge
MRI compatibility demands a deep understanding of:
- RF field interactions with conductive leads
- Heat generation near implants
- Distortion of MRI images
- Movement or torque under magnetic gradients
Using COMSOL’s RF Module and Bioheat Transfer interfaces, engineers can simulate:
- Electromagnetic fields and SAR (specific absorption rate) distribution
- Tissue heating and thermoregulation
- Time-varying induced currents in lead wires and housing materials
- Artifact generation in surrounding anatomy
In Silico Saves the Day
Creating physical prototypes for every permutation of lead shape, coil spacing, and patient body type? That’s a no-go. Instead, in silico models let engineers quickly and accurately evaluate design iterations in a virtual MRI scanner, instilling confidence in the efficiency of the process.
Plus, regulators now fully accept in silico data to support device safety assessments, especially when physical testing is limited or infeasible. This acceptance provides a strong foundation for the validity of the design process.
With COMSOL, engineers can:
- Design MRI-conditional pacing systems
- Validate safety zones around the implant
- Simulate worst-case patient postures and tissue densities
In short: less guesswork, more peace of mind, for both the engineer and the patient. Simulation brings a sense of relief, knowing that the devices are thoroughly tested and safe. Contact Us.