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Abstract #1448

Design of large-size, high-frequency, loop-type surface coil using dipole antennas for ultrahigh filed MR imaging: a feasibility study at 400MHz and 600MHz

Shasha Yue1 and Xiaoliang Zhang2,3

1Institute of Biophysics, Chinese Academy of Sciences, Beijing, China, 2Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, United States, 3UCSF/UC Berkeley Joint Graduate Group in Bioengineering, San Francisco, CA, United States

Due to the parasitic capacitance and increased inductance, building large-size high frequency RF coils, including surface coils for human MR imaging applications at ultrahigh fields, is a challenge. By taking the advantage of high frequency capability and large size of dipole antennas, in this work, we propose a novel surface coil design method using the proposed V-shaped dipole antennas for large-size, high-frequency, loop-type surface coils in ultrahigh field MR applications in humans. The results show that the proposed large size loop-type dipole surface coils (~20cm or ~16cm diameter) have the potential to generate common B1 field distributions of traditional loop-type surface coils at 9.4T (400MHz) and 14T (600MHz). This opens up the possibility of constructing high frequency large size surface coils for ultrahigh field MR imaging in humans.

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