Meeting Banner
Abstract #3872

SAR Monitoring and Pulse Design Workflow in Parallel Transmission at 7 Tesla

Khaldoun Makhoul1, Yik-Kiong Hue1, Lohith Kini2, Kawin Setsompop1, Joonsung Lee2, Kyoko Fujimoto1, Elfar Adalsteinsson2,3, Lawrence Leroy Wald1,3

1A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, United States; 2Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; 3Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States

The use of parallel transmission requires additional care to avoid exceeding local SAR limits. SAR calculation must be done for each RF pulse designed while the subject is in the scanner. An integrated software tool for SAR monitoring provides a means of performing B1+ mapping, RF pulse design and SAR checking in a simple workflow, emphasizing patient safety. Using pre-calculated E1 fields, and performing the SAR calculation on a consumer-level graphics processor, computation times on the order of minutes are achieved.