Figure 1From: Three-dimensional balanced steady state free precession myocardial perfusion cardiovascular magnetic resonance at 3T using dual-source parallel RF transmission: initial experienceExample of the effect of local RF shimming on B1 map in a volunteer. Image (a) shows conventional RF transmission without RF shimming. Image (b) shows the use of dual source RF transmission with local RF shimming. The mean percentage of flip angle achieved was 74.6% with conventional RF transmission and 91.3% with dual source RF transmission demonstrating improved homogeneity.Back to article page