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相关概念视频

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

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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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Large-scale Recording of Neurons by Movable Silicon Probes in Behaving Rodents
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基于多层石墨烯的MEMS兼容的神经探针用于刺激和记录

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
概括

研究人员开发了一种使用多层石墨烯 (MLG) 的新型无金属神经探针,以提高MRI兼容性和电化学性能. 这种石墨烯神经探测器为先进的神经成像和脑电脑接口提供了突破.

关键词:
核磁共振的兼容性灵活的神经探针长期记录多层石墨烯神经刺激

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科学领域:

  • 生物电子
  • 材料科学
  • 神经科学

背景情况:

  • 传统的金属神经探针会造成MRI装置和热风险.
  • 功能性神经成像需要改进的神经接口材料.

研究的目的:

  • 开发用于MRI集成应用的无金属神经探针.
  • 为了提高神经记录的电化学性能和生物相容性.

主要方法:

  • 在聚胺上使用旋转喷雾沉积制造多层石墨烯 (MLG) 神经探针.
  • 电化学性质 (电荷储存能力,注入极限) 和机械性质 (模量) 的表征.
  • 在小鼠海马体中评估MRI兼容性 (易感元件,射频诱导的加热) 和长期的体内性能.

主要成果:

  • 与黄金电极相比,MLG探测器显示电荷储存能力和注射极限显著提高.
  • 探测器显示了最小的MRI器件和RF诱导的加热 (在9.4T时<0.4°C).
  • 在体内维持了6个月的稳定电生理性能,阻抗偏移低.

结论:

  • MLG神经探针具有卓越的电化学效率和MRI兼容性.
  • 这种无金属探测器是先进的MRI集成神经接口的有前途的工具.
  • 基于石墨烯的材料具有未来生物电子应用的巨大潜力.