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Magnetic resonance urography (MRU) techniques have matured and have become applicable to the diagnosis of more and more diseases in urinary tract. Modern MRU offers not only increased spatial and temporal resolution, but also provides anatomic and functional information on renal perfusion, excretion and drainage. Patients with renal colic are better examined by non-enhanced computed tomography (CT) scanning because it is highly sensitive in detecting stones. However, one disadvantage of nonenhanced CT is the high radiation dosage. The goal of this review is to briefly discuss MRU indications for patients with suspected acute calculus ureteric obstruction, summarize MRU techniques as applicable in the diagnosis, and compare MRU techniques to other traditional imaging techniques such as unenhanced spiral CT, intravenous urography (IVU), and ultrasonography.

Magnetic Resonance Urography as an Imaging Modality for Urinary Stone Diseases