Abstract
Driven by technological advances, the ability of magnetic resonance imaging (MRI) to assess gastric motor functions has substantially advanced since the earliest studies of gastric emptying and antral and small-bowel motility nearly two decades ago. Those studies used the echo-planar imaging (EPI) sequence on a home-built scanner to acquire an image plane within tens of milliseconds using a single shot sequence scheme that allows easy weighting of the sequence to the relaxation times T 1 and T 2 or diffusion and to measure these MRI parameters quantitatively. However, EPI is prone to artifacts and has limited spatial resolution. Since then, imaging modalities have improved substantially, initially through spin echo sequences and more recently with development of fast spin echo and spoiled gradient echo sequences, which provide high-resolution abdominal imaging in a matter of hundreds of milliseconds, permitting GI function, including gastric volumes and contractility, to be evaluated in real time by MRI.
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