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Related Concept Videos

Patch Clamp01:18

Patch Clamp

6.0K
Many fundamental cell functions such as muscle contraction and nerve transmission rely on the electrical signals produced by the movement of positively and negatively charged ions across the cell membrane. One competent method to record current flowing across the whole cell or single ion channel is the patch-clamp technique.
In this method, a glass micropipette containing electrolyte solution is tightly sealed against a small portion of the cell membrane. As a result, a patch of the cell...
6.0K

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Measurement of Bioelectric Current with a Vibrating Probe
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[Study on an optimized patch probe and its biomedical application].

Liping Yan1, Kama Huang, Changjun Liu

  • 1College of Electronics and Information Science, Sichuan University, Chengdu 610064, China. sherry-yan@163.com

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi = Journal of Biomedical Engineering = Shengwu Yixue Gongchengxue Zazhi
|January 19, 2007
PubMed
Summary
This summary is machine-generated.

This study presents a novel wide-band patch probe for noninvasive high-frequency measurements of superficial tissues. Optimized using genetic algorithms and Finite Difference Time Domain, it enables accurate electrical property reconstruction.

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Area of Science:

  • Electromagnetics
  • Biomedical Engineering
  • Materials Science

Context:

  • Noninvasive measurement of superficial tissues is crucial for medical diagnostics.
  • High-frequency electromagnetic properties of tissues are key indicators of their state.
  • Existing methods often lack the required bandwidth or precision for superficial tissue analysis.

Purpose:

  • To develop and optimize a wide-band patch probe for high-frequency noninvasive tissue measurements.
  • To utilize genetic algorithms (GA) and Finite Difference Time Domain (FDTD) for probe optimization.
  • To investigate the probe's performance in measuring the reflection coefficient across a 1-7 GHz bandwidth.

Summary:

  • A coaxial-line-excited wide-band patch probe was designed and optimized.
  • Optimization employed a combination of genetic algorithm (GA) and Finite Difference Time Domain (FDTD) methods.
  • The optimized probe successfully measured reflection coefficients from 1-7 GHz, revealing phenomena relevant to tissue electrical properties.

Impact:

  • The optimized probe facilitates accurate, noninvasive characterization of superficial tissue electrical properties.
  • The findings contribute to advancements in high-frequency biomedical sensing and diagnostic techniques.
  • This research supports the development of improved methods for reconstructing tissue electrical properties.