Figure 10.

Moving slice of excitation using different transmit power, using simulations and images. Top four images are simulated and bottom four images are actually acquired images. For each group, from top to bottom, the transmit power is increased by 6 dB for each. The bottom one being 2 ms hard pulse for 10 W per channel. Dotted line in actual images is for reference and not artifact in the image. Because of spin couplings and interactions, the “grainy” area that is very close to the array becomes dark in actual images because the excitation phase variations within the voxel causes cancellation. This effectively makes the excitation slice moving into the subject for imaging.