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.
Keywords