Jove
Visualize
Contact Us

Related Experiment Videos

Single-plane multifrequency electrical impedance instrumentation

P M Record1

  • 1University of Keele, School of Post Graduate Medicine, Department of Biomedical Engineering and Medical Physics, Hospital Centre, Hartshill, Stoke, UK.

Physiological Measurement
|May 1, 1994
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Bio-impedance active electrode for in vivo measurement.

Medical & biological engineering & computing·1994
Same author

Raw data interchange format for electrical impedance tomography.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same author

Multifrequency electrical impedance tomography.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same author

On the sensitivity method of reconstruction for electrical impedance tomography.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1990
Same journal

Continuous tracking of aortic aneurysm diameter with peripheral pulse waves: a computational framework combining sequential Markov chain Monte Carlo with Kalman filtering.

Physiological measurement·2026
Same journal

The 2026 global roadmap for textile-integrated wearable technologies in health.

Physiological measurement·2026
Same journal

Augmenting single-lead ECG interpretation through QRS waveform decomposition and rotation.

Physiological measurement·2026
Same journal

Dynamic Beat-to-Beat Blood Pressure Estimation using a Multi-modal Wearable Deep Learning Approach.

Physiological measurement·2026
Same journal

Dual warm-start fusion versus attention-based fusion in low-label ECG-PCG classification: a controlled ablation study.

Physiological measurement·2026
Same journal

Inter-patient multi-label ECG classification via low-rank adaptation fine-tuned large language models with dynamic graph convolutional network.

Physiological measurement·2026
See all related articles
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

This study designed an impedance tomographic spectrometer for tissue analysis, achieving accurate measurements up to 3 MHz. This instrumentation advances the characterization of tissue impedance for distinguishing damaged tissue.

Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Medical Imaging

Background:

  • Tissue electrical properties, including resistivity and permittivity, change with electromagnetic radiation frequency.
  • Dielectric changes in tissue above 100 kHz offer potential for distinguishing damaged and necrotic tissue.
  • Tissue impedance in the medium frequency range (100 kHz-1 MHz) remains underexplored.

Purpose of the Study:

  • To design instrumentation for an impedance tomographic spectrometer.
  • To cover the frequency band of 10 kHz to 1 MHz for tissue impedance spectroscopy.
  • To achieve voltage measurement accuracy of at least 0.1% for sensitive resistivity imaging.

Main Methods:

  • Utilized commercially available operational amplifiers for instrumentation design.

Related Experiment Videos

  • Employed PSPICE simulations to predict performance and accuracy.
  • Implemented and tested the designed instrumentation for amplitude and phase response.

    • Main Results:

    • Simulations indicated 0.1% accuracy up to 800 kHz, decreasing to 0.5% at 1 MHz.
    • Implemented design showed a flat amplitude (+/- 0.5 dB) and 50-degree phase shift from 10 kHz to 3 MHz.
    • Achieved a receive response of 0.13 dB to 5 MHz and a -40-degree phase shift at 3 MHz, with useful readings up to 3 MHz after channel correction.

    Conclusions:

    • The designed instrumentation provides accurate tissue impedance measurements within the 10 kHz to 3 MHz range.
    • This spectrometer is suitable for distinguishing damaged and necrotic tissue based on dielectric changes.
    • The developed system advances the characterization of tissue impedance at medium frequencies for potential clinical applications.