Abstract #1367
Variation in thermal maps during RF heating due to variation in electrical conductivity in TEM coil at 298 MHz
Muhammad Hassan Chishti 1 , Matthew R. Tarasek 1 , Margarethus M. Paulides 2 , and Desmond Teck Beng Yeo 1
1
GE Global Research Center, Niskayuna, New
York, United States,
2
Erasmus
Medical Center, Rotterdam, Netherlands
Synopsis: The uncertainty of electrical conductivity (σ)
values used in electromagnetic (EM) simulations may lead
to incorrect assessment of SAR and risks for tissue
ablation in patients during MR imaging at ultra-high
fields and in RF thermotherapy applications. In this
work, we investigate the errors in predicted
temperatures due to incorrect assignment of values to σ
caused by (i) variations in reported values in the
literature, and (ii) temperature-induced variations of
σ. Results from our full-wave EM (298 MHz) and thermal
simulations show that the uncertainties in σ may induce
temperature prediction errors by up to 5.3 C.
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