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Abstract #2149

Improvement of B1+ Homogeneity along Z-Direction Using Top-Hat Dipole-Antenna pTX Array for Body Imaging at 7 Tesla

Suchit Kumar1, Joshua Haekyun Park2,3, Young-Seung Jo2,4, Jeong-Hee Kim2,3, Chulhyun Lee2, and Chang-Hyun Oh1,4,5

1Department of Biomicrosystem Technology, Korea University, Seoul, Korea, Republic of, 2Korea Basic Science Institute, Cheongju, Chungcheongbuk-do, Korea, Republic of, 3Industrial Technology Institute, Korea University, Sejong City, Korea, Republic of, 4Department of Electronics and Information Engineering, Korea University, Seoul, Korea, Republic of, 5ICT Convergence Technology Team for Health&Safety, Korea University, Seoul, Korea, Republic of

In ultra-high field (UHF), body imaging suffers from B1 inhomogeneity due to shorter wavelength. A range of new RF coil designs has been proposed to overcome this problem. But, B1 inhomogeneity in the coronal plane still exists due to limited coverage. In this work, a novel design of an 8-channel top-hat dipole antenna with parallel transmission is proposed to improve B1+ homogeneity along Z-direction. B1+ field distribution and SAR field were simulated in FDTD solver. Comparison with original dipole antenna array confirms the improved B1+ homogeneity in proposed design.

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