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Abstract #0310

16-Channel Degenerate Birdcage T/R Loop Array Head Coil for Parallel Transmit MRI at 7 T

SUMMA25Wei Zhao1, Borjan Gagoski2, Khaldoun Makhoul1, Boris Keil1, Azma Mareyam1, Philipp Hoecht3, Lawrence L. Wald1

1Athinoula A. Martinos Center for Biomedical Imaging, Dept. of Radiology Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States; 2Electrical engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; 3Siemens Medical Solutions USA Inc., Charlestown, MA, United States

Parallel transmit method has provided the potential to shape excitations with practical pulse lengths and mitigate B1+ inhomogeneity and B0 inhomogeneity at high field. Increasing the number of transmit channels offers the flexibility for adjusting the phase and amplitude of each channel and the degree of the freedom for improved pulse design and SAR. In this work, we developed a 16-channel T/R degenerate birdcage head coil in a single cylindrical row, with good decoupling (>15dB) between the next neighbors and high B1+ efficiency as compared with that of an 8-channel concentrically shielded T/R array coil.

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