Figure 6From: Iterative multi-channel radio frequency pulse calibration with improving B1 field uniformity in high field MRI Flip angle maps produced by the quadrature excitation (a,d), the iterative RF pulse calibration (b,e) and the B1 shimming (c,f). The top (a,b,c) and bottom (d,e,f) rows. The top and bottom rows show the flip angle maps on an axial slice and a coronal slice, respectively. The RF pulse calibration has been made for each slice.Back to article page