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Making RF coils MR-invisible by additive manufacturing using magnetically filled polymer
Markus Weiger1, Johan Overweg2, Amelie Viol1
1Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland.
Magnetic Resonance in Medicine
|October 6, 2025
Summary
Researchers developed MR-invisible radiofrequency (RF) coils using magnetic particles to eliminate background artifacts in short T2 MRI. This innovation enhances image quality without compromising performance or coil design.
Area of Science:
- Magnetic Resonance Imaging (MRI)
- Materials Science
- Biomedical Engineering
Background:
- Short T2 MRI is susceptible to radiofrequency (RF) coil signals, causing image artifacts.
- Existing solutions for RF coil artifacts often degrade imaging performance or limit coil design.
Purpose of the Study:
- To create MR-invisible RF coils without compromising imaging performance or design flexibility.
- To eliminate background artifacts in short T2 MRI caused by RF coil signals.
Main Methods:
- Incorporated magnetic particles into RF coil housing materials.
- Utilized additive manufacturing to create coil formers from magnetite-filled polymer filaments.
Main Results:
- Successfully eliminated unwanted RF coil signals using magnetically filled polymer coil formers.
- Enabled background-free short T2 MRI by rendering RF coils MR-invisible.
Conclusions:
- Magnetically filled materials simplify RF coil design and manufacturing.
- Eliminates the need for MR sequence alterations, improving short T2 MRI performance.
