SENSE Accelerated Multiple Excitation Imaging at Ultra High Field
Jones A, Glover P, Magill A
At high frequencies (>128MHz) the RF wavelength approaches the dimensions of the human head, leading to a significant B1 phase variation across the sample. This causes destructive or constructive interference, giving highly inhomogeneous B1 fields. By employing multiple independent elements excited sequentially using a BURST like imaging sequence, we are able to separate signals due to different transmit elements within the same slice without interference. However, there is a time penalty associated with the sequential excitation. In this work we demonstrate the use of SENSE to accelerate image readout, restoring the speed to near that of a single excitation readout.