Document Type thesis Author Name Obi, Aghogho A URN etd-0114104-103813 Title A Novel Radio Frequency Coil Design for Breast Cancer Screening in a Magnetic Resonance Imaging System. Degree MS Department Electrical & Computer Engineering Advisors Prof. Reinhold Ludwig, Advisor Prof. John Sullivan, Committee Chair Prof. William Michalson, Committee Member Prof. Fred Looft, Department Head Keywords Magnetic Resonance Imaging Radio Frequency Coil Breast Cancer Imaging Systems Date of Presentation/Defense 2003-12-12 Availability unrestricted
Magnetic Resonance Imaging (MRI) is a widely used soft tissue imaging technique that has gained considerable success because of its sensitivity to several tissue parameters. However, commercially available whole-body imaging systems with large encircling radio frequency (RF) and gradient coils are less efficient when the goal is to obtain detailed, high-resolution images with high specificity and sensitivity from localized regions of the body such as the female breast.
This research addresses these problems by proposing a new design in RF coil development for breast cancer screening in a conventional 1.5T MRI system. The new design provides two resonant receiving modes that operate in a quadrature configuration, and a region of interest (ROI) that closely conforms to the shape of the female breast.
We adopted an optimum design strategy that combined the analytic Biot-Savart intergral equation with the Method of Moment formulation in the development of electromagnetic models and simulation tools. These models were used to analyze the magnetic field distribution and the spatial field coverage, as well as the magnetic field uniformity in the ROI. Results from our analysis were employed in the construction of a highly scalable prototype. The validation of our design strategy is confirmed by comparisons with the commercial Ansoft HFSS v8.5 finite element package.
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