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Abstract #4437

Flexibly Shaped Saturation Band Excitation using 7T Parallel Transmit System

Borjan Gagoski1, Khaldoun Makhoul2,3, Dieter Ritter4, Kawin Setsompop2,3, Josef Pfeuffer4, Himanshu Bhat5, Philipp Hoecht5, Michael Hamm5, Ulrich Fontius4, Lohith Kini1, Joonsung Lee1, Lawrence L. Wald2,6, Elfar Adalsteinsson1,6

1Electrical Engineering & Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; 2A.A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, United States; 3Harvard Medical School, Boston, MA, United States; 4Siemens Healthcare, Erlangen, Germany; 5Siemens Healthcare, Charlestown, MA, United States; 6Harvard-MIT Division of Health Sciences & Technology, MIT, Cambridge, MA, United States

Parallel RF transmission (pTx) offers significant flexibility over single-channel excitations for creating arbitrarily shaped spatial excitation patterns, which can be designed for undersampled spiral-based excitation k-space trajectories played during the pTx RF waveform. In this work we validate the feasibility of using 7T 8-channel pTx for flexibly shaped saturation bands that suppresses a user-defined spatial shape, in combination with a B1+ mitigated pTx slice-selective "spokes" excitation.