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Abstract #4812

Improved surface coil performance at any depth in a lossy sphere with a dielectric disc

Wei Luo 1,2 , Yang Qing 1 , and Christopher M. Collins 3

1 Radiology, Pennsylvania State University, Hershey, PA, United States, 2 Engineering Science & Mechanics, Pennsylvania State University, University Park, PA, United States, 3 Radiology, New York University, New York, NY, United States

A simple hybrid coil-HPM design using a simple loop coil and a high-permittivity material (HPM) disc was optimized at 3T using PSO/FDTD method including the consideration on HPM location, geometry, material properties, MRI coil location, and coil geometry for the first time. The coil efficiency of the optimized hybrid design was better than the one produced by the optimized single loop coil at any depth in a lossy sphere, particularly by an average increase of 87% and 22% at the center and superficial regions, respectively. The performance of this simple hybrid design encourages us to expect more improvement with a more sophisticated design.

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