Nuclear magnetic resonance imaging represents a technique that is indispensable in every day biomedical diagnostics. Thanks to the numerous ways to manipulate and detect an NMR signal, it is possible to obtain a variety of information with excellent spatial and temporal resolution. Today's MRI techniques go far beyond the illustration of pure anatomical structures and include the revealing of processes down to the molecular level. The number of small animal imaging centers relying on MRI as a key method for preclinical research to understand diseases and to test for novel treatments is...