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Data acquisition system for MAET with magnetic field measurements
Keivan Kaboutari1, Ahmet Önder Tetik1, Elyar Ghalichi1
1Department of Electrical and Electronics Engineering, Middle East Technical University, Ankara, Turkey.
Physics in Medicine and Biology
|April 11, 2019
Summary
This study introduces a new data acquisition system for magneto-acousto-electrical tomography (MAET) imaging. The system successfully detects electrical conductivity variations in biological tissues, paving the way for improved medical imaging.
Area of Science:
- Biomedical Engineering
- Medical Imaging Physics
Background:
- Magneto-acousto-electrical tomography (MAET) images tissue conductivity using ultrasound-induced currents in a magnetic field.
- Developing robust data acquisition systems is crucial for MAET's clinical translation.
Purpose of the Study:
- To develop and assess a novel data acquisition system for MAET utilizing magnetic field measurements.
- To evaluate the system's capability in imaging biological tissue electrical conductivity.
Main Methods:
- A static magnetic field was generated using neodymium magnets.
- A 16-element linear phased array transducer produced acoustic waves.
- Contactless Helmholtz coil sensors and a high-gain amplifier system were employed for magnetic field detection.
Main Results:
- The data acquisition system successfully detected inhomogeneities with 3 S m⁻¹ conductivity.
- Front and rear interfaces of inhomogeneities with 58 S m⁻¹ conductivity were identifiable.
- A-scan and B-scan images were acquired using the developed system.
Conclusions:
- The developed data acquisition system is effective for MAET imaging of biological tissues.
- The system demonstrates potential for detecting clinically relevant conductivity variations.
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