Abstract #3222
Experiments and Analysis of Virtual Observation Points at 7T
Yujuan Zhao 1 , Tiejun Zhao 2 , and Tamer Ibrahim 1
1
University of Pittsburgh, Pittsburgh,
Pennsylvania, United States,
2
Siemens
Medical Solutions USA, Pittsburgh, Pennsylvania, United
States
PTX excitation may create distinct hot spots inside the
human body by constructive interference of electric
fields generated by the respective coil elements driven
with individual amplitudes and phases. Monitoring global
and local peak SAR is a challenging task. In this study,
the system global power and the local SAR from Virtual
Observation Points (VOP) model in conjunction with
rigorous RF modeling that incorporates coupling are
demonstrated and verified in-vivo by experiments
acquired using the Parallel RF transmission system. The
input simulated SAR model is also verified
quantitatively using B1+ maps as well as local VOP SAR
monitoring.
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