Abstract
Anatomically realistic numerical breast models are essential tools for microwave breast imaging, supporting feasibility analysis, performance verification, and design improvements. Patient-specific models also assist in interpreting the results of the patient studies conducted on microwave imaging prototype systems. The proposed method employs automated and robust 3D processing techniques to construct flexible and reconfigurable breast models. These techniques include noise and artifact suppression with a principal component analysis (PCA) approach, and oversampling of the magnetic resonance imaging (MRI) data to enhance the intensity continuity. The k-means clustering segmentation identifies fatty and fibroglandular tissues and further segments these regions into a selected number of tissues, providing reconfigurable models. A peak Gaussian fitting technique maps the model clusters to the dielectric properties. The robustness of the proposed method is verified by applying it to both 1.5- and 3-T MRI scans as well as to scans of varying breast densities.
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Acknowledgements
We would like to acknowledge our funding sources, including the Alberta Innovates Technology Futures (AITF) Strategic Chair, Alberta Innovates Health Solutions (AIHS), Vanier Canada Graduate Scholarship (CGS) and Izaak Walton Killam Memorial Scholarship. We are also grateful to Dr. Richard Frayne and Seaman Family MR Research Centre for acquisition of 3-T MRI scans, and radiologist Dr. Clare Romano.
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Omer, M., Fear, E.C. Automated 3D method for the construction of flexible and reconfigurable numerical breast models from MRI scans. Med Biol Eng Comput 56, 1027–1040 (2018). https://doi.org/10.1007/s11517-017-1740-9
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DOI: https://doi.org/10.1007/s11517-017-1740-9