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Related Experiment Video

Updated: Jul 16, 2025

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Dual-Channel Stretchable, Self-Tuning, Liquid Metal Coils and Their Fabrication Techniques.

Elizaveta Motovilova1,2, Terry Ching3,4,5, Jana Vincent6

  • 1Department of Radiology, Weill Cornell Medicine, New York, NY 10065, USA.

Sensors (Basel, Switzerland)
|September 9, 2023
PubMed
Summary

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Editorial for "MR Imaging-Based Biomarkers for Strength Prediction: A Statistical Shape and Architecture Modeling of Quadriceps Muscles".

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Clinical quality of breath-held T1-weighted breast MRI in the supine position.

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High-Resolution 2D versus 3D Lumbar Spine MRI Optimized with a Deep Learning Reconstruction Algorithm and Prototype Conformal Coil.

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3D Brachial Plexus Neurography With Variable-Rate Selective Excitation RF Pulses.

Journal of magnetic resonance imaging : JMRI·2026

Researchers developed a scalable, multi-element flexible radiofrequency coil for magnetic resonance imaging. This new coil offers improved anatomical fit and a 50% signal-to-noise ratio boost, enhancing imaging quality and patient comfort.

Area of Science:

  • Medical Imaging
  • Materials Science
  • Electrical Engineering

Background:

  • Flexible and stretchable radiofrequency (RF) coils are emerging for magnetic resonance imaging (MRI).
  • Their conformal nature offers better anatomical fit, patient comfort, and movement freedom.
  • Previous work demonstrated a single-element stretchable coil with self-tuning geometry.

Purpose of the Study:

  • To evaluate the feasibility of scaling a stretchable coil concept to a multi-element array.
  • To identify engineering and manufacturing challenges for multi-element stretchable coil arrays.
  • To assess the performance of a dual-channel stretchable coil array in MRI.

Main Methods:

  • Full-wave simulations, bench testing, in vitro, and in vivo imaging were performed on a dual-channel coil array at 3 T.
Keywords:
3D printingdirect ink writingliquid metalradiofrequency coilself-tuningstretchable electronics

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  • Three fabrication techniques were employed: single-layer casting, double-layer casting, and direct-ink-writing.
  • Coil performance was compared to a commercial knee coil array.

    • Main Results:

    • All fabricated dual-channel arrays performed comparably on bench tests with similar sensitivity maps.
    • Direct-ink-writing proved most advantageous for fabrication speed, accuracy, repeatability, and thinness (0.6 mm).
    • The stretchable coil array demonstrated excellent frequency stability (128 ± 0.6 MHz) across 0% to 30% stretch and provided a 50% SNR improvement.

    Conclusions:

    • Scaling stretchable RF coil technology to multi-element arrays is feasible.
    • Direct-ink-writing is a superior fabrication method for these devices.
    • The developed stretchable coil array offers superior anatomical conformity and enhanced MRI signal-to-noise ratio.