Imagerie par résonance magnétique du rein et des voies excrétrices : techniques et aspects normaux

High power gradients have greatly improved acquisition of fast or ultrafast sequences during apnea without motion artifacts, enabling dynamic analysis of the contrast enhancement, and thus improved tissue characterization and also, in the near future, an exploration of renal function. Phased array antennas have significantly improved spatial resolution, making it possible to identify small lesions. The uro-magnetic resonance imaging (MRI) sequences provide an interesting morphological approach to the urinary tract. DWI is already applicable in routine clinical practice. There are a multitude of acronyms, variants with different sequences and parameters, using design features unique to each manufacturer. But all sequences have the same descriptive principles. Compared with the CT scan, MRI offers the advantage of avoiding the risks of allergy to the iodinated contrast and x-ray exposure. All these technological advances have greatly increased the role of MRI in the diagnostic armamentarium for urinary tract disorders. An all-in-one review of the tract's morphological features is now possible, with in the near future, important information on its function.