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Medical imaging with a microwave tomographic scanner.

L Jofre¹, M S Hawley, A Broquetas

¹ETSE Telecommunicació, Universitat Politécnica de Catalunya, Barcelona, Spain.

IEEE Transactions on Bio-Medical Engineering

|March 1, 1990

Summary

This study introduces a new microwave tomographic scanner for medical imaging. The system offers fast, high-resolution scans for detecting tissue changes without mechanical parts.

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Area of Science:

Biomedical Engineering
Medical Imaging Technology
Microwave Engineering

Background:

Current medical imaging techniques face limitations in speed, resolution, or invasiveness.
Microwave tomography offers a non-ionizing imaging modality with potential for detecting tissue variations.
Developing advanced scanners is crucial for improved diagnostic capabilities.

Purpose of the Study:

To present a novel microwave tomographic scanner designed for biomedical applications.
To evaluate the system's performance for both absolute and differential tissue imaging.
To assess the scanner's suitability for medical use through phantom and volunteer studies.

Main Methods:

Utilized a 64-element circular antenna array with a 20 cm diameter.

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Employed electronic scanning for multi-view data acquisition, eliminating mechanical movement.

Validated the system using tissue-simulating phantoms, human volunteers, and numerical simulations.

Main Results:

Achieved a spatial resolution of 7 mm and a contrast resolution of 1%.
Demonstrated a rapid measurement time of 3 seconds per scan.
Successfully assessed tissue distribution and changes in phantoms and volunteers.

Conclusions:

The developed microwave tomographic scanner is suitable for medical applications.
The system's speed and resolution enable effective differential imaging of tissue changes.
Further validation is warranted for clinical implementation and broader diagnostic use.