FIG. 1.

An illustration comparing fat saturation with a single channel to potential improvement with a multichannel technique. A single-channel volume coil (a) has only the ability to define a narrow or broad bandwidth to address spectral broadening (b), and is liable to suffer from incomplete fat excitation or unwanted water saturation, due to spectral overlap. Two independent transmit coils (c) can improve this situation by addressing the smaller bandwidth (d) of a select region, improving fat saturation without water saturation. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]