MRI-Compatible Polymer Cables Enable Safer Brain Stimulation

Industry Insights from Next Move Strategy Consulting

In a major advancement for medical imaging and brain research, scientists have developed MRI-compatible polymer cables that support safer electrical brain stimulation within magnetic resonance imaging environments. The innovation addresses longstanding safety and interference challenges that have constrained the integration of imaging and neurostimulation techniques.

Rethinking Cable Safety in MRI

Magnetic resonance imaging (MRI) is a cornerstone of modern diagnostic medicine, prized for its ability to generate detailed images of internal tissues and organs without ionizing radiation. However, the strong magnetic fields and radiofrequency energy fundamental to MRI also pose risks when conventional metallic components, such as copper cables, are present. These materials can heat up dangerously and distort imaging, creating hazards for patients undergoing simultaneous diagnostic or therapeutic procedures.

To overcome these barriers, a research team from Empa’s Advanced Fibers Laboratory in St. Gallen, in partnership with Swiss company TI Solutions AG, has engineered a new class of electrode cables predominantly constructed from polymer fibers. Coated with an ultra-thin metallic layer, the fibers achieve precisely defined electrical conductivity—sufficient for signal transmission while minimizing interaction with MRI radio waves.

“We designed a cable with very low, yet controlled metallic conductivity,” explained project lead Dirk Hegemann, highlighting the balance between signal fidelity and MRI compatibility.

Key Features and Development

• Polymer-Based Design: The cables primarily use nonmetallic fibers, reducing magnetic susceptibility and heating risks.

• Precision Conductivity: A micro-thin coating of silver and titanium provides stable electrical performance without disrupting MRI operation.

• Durability: Long-term testing shows consistent conductivity and resistance to corrosion and mechanical wear.

• Scalable Production: The magnetron sputtering process used for coating is compatible with industrial roll-to-roll manufacturing, enabling larger-scale output.

TI Solutions’ Head of Research and Development, Sven Kühn, observed that the new “MRIComplead” cables give research partners the first opportunity to safely visualize the effects of temporal interference (TI) stimulation in the brain using MRI, without compromising image quality or patient safety.

Towards Clinical and Research Integration

The collaborative project, supported by Innosuisse, concluded successfully in 2025. An initial kilometer of prototype cable has already been produced, and ongoing efforts aim to support demonstration units and early sampling with industry partners. If these cables prove effective in practical applications, they are expected to move into industrial production, further expanding their use in combined MRI and neurostimulation workflows.

Next Move Strategy Consulting’s View Point

This development marks a significant shift in how medical professionals can conduct diagnostic imaging alongside therapeutic stimulation. By enabling safe, interference-free integration of MRI with neurostimulation technologies like EEG and TI, polymer-based cables could accelerate research into neurological disorders, streamline clinical protocols, and improve patient outcomes. Over time, the use of MRI-safe cabling may become a standard component in multimodal diagnostic and treatment platforms, reinforcing the trend toward more integrated and patient-centric medical technologies. 

Source: News-Medical.net

Prepared by: Next Move Strategy Consulting