Abstract #2394
Multiband arbitrary-phase SLR RF pulse with generalized flip angle via convex optimization
Hong Shang 1,2 , Peder E.Z. Larson 1,2 , Adam B. Kerr 3 , Galen Reed 4 , Adam Elkhaled 1,2 , Jeremy W. Gordon 1 , Cornelius von Morze 1 , Michael Lustig 5 , and Daniel B. Vigneron 1
1
Radiology and Biomedical Imaging, UCSF, San
Francisco, California, United States,
2
UCSF-UC
Berkeley Graduate Program in Bioengineering, San
Francisco/Berkeley, California, United States,
3
Electrical
Engineering, Stanford University, Stanford, California,
United States,
4
HeartVista,
Menlo Park, California, United States,
5
Electrical
Engineering and Computer Science, UC Berkeley, Berkeley,
California, United States
A framework for general RF pulse design is developed
based on convex optimization. It can create an RF pulse
with multiband magnitude profile, arbitrary phase
profile and generalized flip angle. Spectral profile
sparsity is exploited to further optimize pulse
characteristics such as duration, transition width and
SAR with flexible trade-off among them. Designs for
specialized excitation RF pulses for balanced SSFP C-13
MRI and a dualband saturation RF pulse for H-1 MR
spectroscopy were developed and tested.
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