Abstract #0322
Underestimation Error in Estimating True Local SAR in Perfused Tissues in High and Ultra-High Field MRI
Devashish Shrivastava 1 , J Thomas Vaughan 1 , and Rachana Visaria 2
1
University of Minnesota, Minneapolis, MN,
United States,
2
In
Vivo Temperatures, Minnesota, United States
Underestimation error associated with the conventional
measurement of local specific absorption rate (SAR) in
perfused tissues is quantified as a function of local
tissue perfusion and the temperature difference between
local tissue and blood. Results show that this error may
exceed safe local SAR thresholds, as determined by
regulatory bodies. Correcting for this SAR estimation
error is necessary to build and operate radiofrequency
(RF) coils safely to conduct human imaging at high and
ultra-high fields.
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