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 Park^2,3, Young-Seung Jo^2,4, Jeong-Hee Kim^2,3, Chulhyun Lee², and Chang-Hyun Oh^1,4,5

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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