Related Experiment Videos
Microwave imaging of tissue blood content changes.
M S Hawley1, A Broquetas, L Jofre
1Department of Medical Physics, Barnsley District General Hospital, UK.
Journal of Biomedical Engineering
|May 1, 1991
Summary
Active microwave imaging offers complementary dielectric property data for medical imaging. This technology demonstrates changes in tissue blood content, showing potential for clinical applications.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Electromagnetics
Background:
- Active microwave imaging provides unique dielectric property data distinct from other medical imaging modalities.
- Understanding tissue dielectric properties is crucial for developing advanced diagnostic tools.
Purpose of the Study:
- To present two active microwave imaging systems for biological tissue analysis.
- To evaluate the clinical applicability of microwave imaging for detecting physiological changes.
Main Methods:
- Development of a planar microwave imaging system using back propagation reconstruction.
- Implementation of a tomographic scanner with a 64-element waveguide array and spectral domain interpolation.
- Operation at 2.45 GHz with low incident power (<1 mW cm-2) and use of a water coupling medium.
Main Results:
- Demonstrated imaging of isolated animal organs, showing effects of perfusion changes.
- Obtained images of forearm internal dielectric structure and blood content variations.
- Confirmed microwave imaging's capability to visualize changes in tissue dielectric properties.
Conclusions:
- Active microwave imaging systems are suitable for clinical use with high spatial and contrast resolution.
- The technology effectively visualizes changes in tissue dielectric properties related to blood content.
- Microwave imaging holds promise for various clinical diagnostic applications.