SAR-Analysis for Transmit SENSE with a 4-Channel Head Array at 3 T
Ullmann P, Junge S, Seifert F, Wuebbeler G, Hennig J, Ruhm W
University Hospital Freiburg
The concept of Transmit SENSE has gained considerable interest in the past few years and is now on the cusp of being evaluated for practical applications. One very important safety issue in this context is the behavior of the specific absorption rate when performing Transmit SENSE experiments. In this study a detailed SAR-analysis of Transmit SENSE with an existing 4-element head array, based on numerical simulations of the electromagnetic fields, has been performed and has revealed a rather complex dependence of RF power and SAR from various parameters such as excitation pattern, k-space trajectory and reduction factor.