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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.

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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.

Keywords:
3D printingPLAUTEZTEmagnetiteshort T2

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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.