Investigating the impact of head position on the spatial distribution of B1+ field for a 60-ch Tx coil at 7T

In this work, we computationally and experimentally evaluated the B1+ field and SAR generated by a 60-channel Tic-Tac-Toc RF coil at 7T MRI scanner on a variety of participants, head models and head positions. On three anatomically detailed human head models, we found slight changes in the intensity and the distribution of B1+ field and SAR over the whole brain when the head was moved out from the top of the coil. This was confirmed in both simulation and experimental B1+ maps. Our results highlighted the impact of imaging setup on imaging quality.