Figure 5From: Iterative multi-channel radio frequency pulse calibration with improving B1 field uniformity in high field MRI The magnitude (a,c) and phase (b,d) maps of the B1 field generated by the birdcage coil. The top (a,b) and bottom (c,d) rows. The top and bottom rows represent the channel 1 and channel 2 of the birdcage coil, respectively.Back to article page