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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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Multilayer Graphene Based MRI Compatible MEMS Neural Probes for both Stimulation and Recording.

Kejun Tu1,2, Longchun Wang1, Hao Chen3,4

  • 1National Key Laboratory of Advanced Micro and Nano Manufacture Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 26, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel metal-free neural probe using multilayer graphene (MLG) for improved MRI compatibility and electrochemical performance. This graphene neural probe offers a breakthrough for advanced neuroimaging and brain-computer interfaces.

Keywords:
MRI compatibilityflexible neural probelong‐term recordingmultilayer grapheneneural stimulation

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Area of Science:

  • Bioelectronics
  • Materials Science
  • Neuroscience

Background:

  • Conventional metallic neural probes cause MRI artifacts and thermal risks.
  • Advancing functional neuroimaging requires improved neural interface materials.

Purpose of the Study:

  • To develop a metal-free neural probe for MRI-integrated applications.
  • To enhance electrochemical performance and biocompatibility for neural recording.

Main Methods:

  • Fabrication of multilayer graphene (MLG) neural probes using spin-spray deposition on polyimide.
  • Characterization of electrochemical properties (charge storage capacity, injection limit) and mechanical properties (Young's modulus).
  • Evaluation of MRI compatibility (susceptibility artifacts, RF-induced heating) and long-term in vivo performance in mouse hippocampus.

Main Results:

  • MLG probes demonstrated significantly higher charge storage capacity and injection limits compared to gold electrodes.
  • Probes exhibited minimal MRI artifacts and RF-induced heating (<0.4 °C at 9.4 T).
  • Stable electrophysiological performance was maintained for six months in vivo with low impedance drift.

Conclusions:

  • The MLG neural probe offers superior electrochemical efficacy and MRI compatibility.
  • This metal-free probe is a promising tool for advanced MRI-integrated neural interfaces.
  • Graphene-based materials hold significant potential for future bioelectronic applications.