Figure 11.

B1 inhomogeneity on breast MRI at 3T can largely be addressed using dual-source parallel RF excitation techniques. Using conventional single-source RF excitation technique (a), there is marked variation in B₁ intensity from right-to- left, with significant variations (arrows) from intended B₁ (100%). Dual-source parallel RF excitation technique (b) substantially improves B₁ inhomogeneity, creating more uniform right-to-left signal. From Body MR Imaging at 3 Tesla, edited by Ihab R. Kamel and Elmar M. Merkle. Copyright © 2011 Cambridge University Press. Reprinted with permission (22).