Three-dimensional near-field microwave holography for tissue imaging
Reza K Amineh1, Ali Khalatpour, Haohan Xu
1Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON, Canada L8S4K1.
International Journal of Biomedical Imaging
|May 3, 2012
Summary
This study introduces a fast microwave imaging system for tissue analysis using near-field holographic reconstruction. Novel algorithms provide accurate 3D tissue images without coupling liquids, improving diagnostic capabilities.
Area of Science:
- Biomedical Engineering
- Electromagnetics
- Medical Imaging
Background:
- Current microwave imaging techniques often rely on coupling liquids and simplified wave assumptions.
- Accurate reconstruction of near-field data is crucial for high-resolution tissue imaging.
Purpose of the Study:
- To develop a fast and reliable microwave imaging setup for tissue analysis.
- To implement novel holographic reconstruction algorithms for improved 3D imaging.
- To eliminate the need for optimization-based deblurring in near-field imaging.
Main Methods:
- Utilizing a wideband TEM horn antenna array for raster scanning.
- Acquiring wideband data at each scanning position without coupling liquids.
- Employing numerical simulations to obtain incident field and Green's function for holographic algorithms.
Main Results:
- Achieved accurate near-field imaging results by replacing plane/spherical wave assumptions.
- Demonstrated that incident field and Green's function can be derived from a single numerical simulation.
- Successfully eliminated the need for optimization-based deblurring for realistic antenna characterization.
Conclusions:
- The developed microwave imaging setup and algorithms enable fast and reliable 3D tissue imaging.
- Numerical simulation of electromagnetic fields significantly enhances holographic reconstruction accuracy.
- This approach offers a promising non-invasive method for tissue diagnostics.
