Specific Absorption Rate Monitor for In-Vivo Parallel Transmission at 7 Tesla

Martijn Anton Cloos¹, Nicolas Boulant¹, Michel Luong², Guillaume Ferrand², Dennis Le Bihan¹, Alexis Amadon¹

It is well established that high local specific absorption rate (SAR) values can occur when using a transmit array at high field. In order to guarantee patient safety without harsh limitations to in-vivo transmit-SENSE applications, subtle SAR monitoring is necessary. In this work we present a SAR monitor at 7 Tesla based on real-time measurement of power going out of each RF amplifier in combination with pre-calculated simulations over a variety of human head models and positions.