Anomaly Detection Using Electric Impedance Tomography Based on Real and Imaginary Images

This research offers a method for separating the components of tissue impedance, namely resistance and capacitive reactance. Two objects that have similar impedance or low contrast can be improved through separating the real and imaginary images. This method requires an Electrical Impedance Tomograp...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2020-03, Vol.20 (7), p.1907
Main Authors: Sapuan, Imam, Yasin, Moh, Ain, Khusnul, Apsari, Retna
Format: Article
Language:English
Subjects:
Algorithms
Anomalies
Breast cancer
Current sources
Data acquisition systems
detection of anomaly
Electric currents
Electric Impedance
Electrical impedance
Electrical Impedance Tomography
Electrodes
Fourier transforms
Humans
Image analysis
Image contrast
Image detection
Image Processing, Computer-Assisted - methods
Organs
Phantoms, Imaging
Phase meters
Programmable current sources
Reactance
real and imaginary image
resistive and capacitive image
Sensors
Thorax - diagnostic imaging
Tomography
Tomography - methods
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Summary:This research offers a method for separating the components of tissue impedance, namely resistance and capacitive reactance. Two objects that have similar impedance or low contrast can be improved through separating the real and imaginary images. This method requires an Electrical Impedance Tomography (EIT) device. EIT can obtain potential data and the phase angle between the current and the potential measured. In the future, the device is very suitable for imaging organs in the thorax and abdomen that have the same impedance but different resistance and capacitive reactance. This device consists of programmable generators, Voltage Controlled Current Source (VCCS), mulptiplexer-demultiplexer potential meters, and phase meters. Data collecting was done by employing neighboring, while reconstruction was used the linear back-projection method from two different data frequencies, namely 10 kHz and 100 kHz. Phantom used in this experiment consists of distillated water and a carrot as an anomaly. Potential and phase data from the device is reconstructed to produce impedance, real, and imaginary images. Image analysis is performed by comparing the three images to the phantom. The experimental results show that the device is reliable.
ISSN:1424-8220
1424-8220
DOI:10.3390/s20071907