Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Videos

Multifrequency electrical impedance tomography.

P M Record¹, R Gadd, F Vinther

¹Department of Biomedical Engineering, University of Keele, Hartshill, Stoke-on-Trent, UK.

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

|January 1, 1992

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

Post-coital haemoperitoneum: a downside to intercourse.

Annals of the Royal College of Surgeons of England·2012

Same author

Evaluation of blood donor deferral causes in the Trinidad and Tobago National Blood Transfusion Service.

Transfusion medicine (Oxford, England)·2009

Same author

Measurement of the internal dose to families of outpatients treated with 131I for hyperthyroidism.

European journal of nuclear medicine and molecular imaging·2008

Same author

ISO-9000: does your department need it?

Nuclear medicine communications·1999

Same author

Effective dose to children and adolescents from radiopharmaceuticals.

Nuclear medicine communications·1999

Same author

Data recovery from reduced electrode connection in electrical impedance tomography.

Medical engineering & physics·1996

Same journal

Changes of erythropoietic and storage iron components in certain clinical situations as evaluated by ferrokinetic investigations.

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 journal

An error study on some linear reconstruction algorithms 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 journal

Effects of myocardial electrotonic interaction on the sequence of excitation and repolarisation and on T wave polarity. Computer modelling experiments.

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 journal

Spectrophotometric measurements of haemoglobin saturation and concentration in skin during the tuberculin reaction in normal human subjects.

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 journal

Antimony electrode for the determination of the intramyocardial pH during open-heart surgery.

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 journal

A thermal clearance probe for continuous monitoring of cerebral blood flow.

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

See all related articles

This study introduces a Fourier transform method for simultaneous multifrequency tomography, simplifying measurements and improving accuracy. This advanced technique enhances electrical impedance tomography (EIT) data acquisition and analysis.

Area of Science:

Electrical Engineering
Biomedical Imaging
Applied Physics

Background:

Multifrequency tomography enables detailed object characterization by analyzing responses across various frequencies.
Sequential frequency sweeping presents challenges with dynamic events and instrumentation complexity.
Existing methods for multifrequency electrical impedance tomography (EIT) can be time-consuming or require complex setups.

Purpose of the Study:

To present a novel Fourier transform-based method for simultaneous multifrequency tomography.
To overcome limitations of sequential sweeping and complex instrumentation in multifrequency EIT.
To demonstrate a simplified and accurate approach for acquiring frequency-dependent impedance data.

Main Methods:

A signal composed of multiple sinusoidal components with known amplitude and phase is constructed.

Related Experiment Videos

The composite signal is transformed into a time-domain series using the inverse Fourier transform and applied to the object.

The detected voltage is transformed back into Fourier components to obtain the object's frequency response.

Main Results:

The Fourier transform method allows simultaneous multifrequency measurements without increased instrumentation complexity.
The technique provides both in-phase and quadrature components, facilitating systematic error correction via software.
Demonstration using a resistor phantom with known frequency-dependent perturbations validated the method's efficacy.

Conclusions:

The described Fourier transform technique offers an efficient and robust solution for simultaneous multifrequency tomography.
This method simplifies data acquisition and analysis in EIT, enabling more accurate characterization of frequency-dependent properties.
The approach eliminates the need for specialized detectors and allows for software-based correction of systematic errors.