Microwave Breast Imaging with Mild Compression and 3D Cross-Validation
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Solution Overview
Problem
Current breast cancer imaging methods, such as mammography, ultrasonography, and magnetic resonance imaging, face limitations including radiation exposure, false positives, and inaccuracies in dense breasts, while microwave imaging systems suffer from misdiagnoses due to tissue heterogeneity and wave attenuation, necessitating a more effective and accurate screening approach.
Innovation Solution
A planar breast cancer screening system using mild compression and dual antenna arrays with horizontal and vertical polarizations to acquire multi-angle, 2D sectional data, enabling 3D reconstruction and cross-validation for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If microwave imaging is used for breast cancer screening, then non-ionizing radiation and safety are improved, but measurement precision deteriorates due to tissue heterogeneity and wave attenuation
Solution Approach 1:
The patent transitions from conventional 2D microwave imaging to 3D microwave tomography by introducing a volumetric measurement domain. Multiple antennas are arranged in three-dimensional space around the breast, enabling measurement of scattering parameters from multiple angles and depths. This dimensional expansion allows accurate localization and characterization of malignant tissues despite wave attenuation and tissue heterogeneity, resolving the measurement precision problem while maintaining the safety advantage of non-ionizing radiation.
Solution Approach 2:
The patent introduces a matching medium as an intermediary between the antennas and breast tissue. This matching medium has electromagnetic properties that bridge the gap between air and breast tissue, reducing reflections and improving wave penetration. By using this intermediary, the system overcomes the challenges of wave attenuation and heterogeneous tissue properties, enabling more accurate detection while maintaining the non-ionizing radiation advantage.
2Measurement precision
If compression is applied to homogenize breast tissue, then measurement precision is improved, but patient comfort deteriorates
Solution Approach 1:
The patent replaces the need for compression-induced homogenization with 3D spatial sampling. By arranging antennas in three-dimensional space and measuring scattering parameters from multiple angles, the system achieves accurate tissue characterization without requiring mechanical compression. The volumetric measurement approach naturally accounts for tissue heterogeneity rather than attempting to eliminate it through compression, thereby maintaining patient comfort while improving measurement precision.
Solution Approach 2:
The patent changes the measurement parameters from surface-level 2D scans to volumetric 3D measurements. By measuring scattering parameters Sij(f) across multiple frequencies and spatial positions, the system obtains comprehensive tissue information without mechanical intervention. This parameter expansion allows accurate detection of malignant tissues while avoiding the discomfort associated with compression.
3Measurement precision
If multi-angle scanning is performed to improve detection accuracy, then measurement precision is improved, but scanning time increases
Solution Approach 1:
The patent performs preliminary measurements of all scattering parameters Sij(f) for every antenna pair across the full frequency range before image reconstruction. By pre-acquiring complete multi-angle scattering data from all antenna combinations, the system eliminates the need for repeated scanning during different reconstruction stages. This preliminary action approach maintains high detection accuracy while significantly reducing total scanning time compared to sequential angle-by-angle measurement.
Solution Approach 2:
The patent implements an antenna array with more elements than the minimum required for basic imaging. This excessive action provides redundant measurement paths and multiple scattering angles, improving detection accuracy through cross-validation. The additional antennas enable comprehensive tissue characterization without proportionally increasing scanning time, as all measurements are acquired simultaneously through the multi-element array configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides non-ionizing, accurate, and comprehensive breast tissue imaging, reducing wave attenuation and tissue heterogeneity effects, allowing for early detection and diagnosis of cancerous tissues through 3D representation and cross-sectional comparisons.
Implementation Method 1
a microwave-based breast cancer screening and early diagnostics imaging system
Implementation Method 2
measuring scattering parameters Sij(f) of the breast tissue
Implementation Method 3
mild compression to, some extent, electromagnetically homogenize the heterogeneous breast media or to, some degree, decrease the breast dimension to 2D
Data Source
AI summary
A microwave-based breast cancer screening and early diagnostics imaging system is provided. The microwave-based breast cancer screening and early diagnostics imaging system uses mild compression to electromagnetically homogenize the heterogeneous breast media or, to some degree, decrease the breast dimension to 2D. The device is capable of providing multi-angle examination, if necessary, and produces horizontal and vertical cross-sectional images based on the polarization of the antennas used for scanning. Merging two-sectional images can give a possibility of 3D microwave representation of the breast tissue that allows identification of the malignant/cancerous/harmful tissues/cells through cross validation.