The value of MR urography that uses HASTE sequences to reveal urinary tract disorders

AJR. American Journal of Roentgenology
Y TangM Takahashi

Abstract

Breath-hold MR urography using half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequences was evaluated as a noninvasive alternative to excretory urography in healthy volunteers and in patients with disorders of the urinary tract. Twenty healthy volunteers and 45 patients with disorders of the urinary tract underwent HASTE MR urography on a 1.5-T MR imaging unit. Imaging time was 2 sec for single-thick-slice (20- to 60-mm slice thickness) technique and 10-18 sec for multislice technique. In the latter, images were postprocessed with maximum-intensity-projection technique and visualized in an arbitrary plane. Obstruction and its level were determined solely by excretory urography in eight patients, by excretory urography with other imaging techniques (CT, retrograde pyelography, or sonography) in 27 patients, and by sonography alone in the 20 normal volunteers, seven pregnant women, and three patients who were allergic to iodinated contrast media. We evaluated whether HASTE MR urograms showed obstruction, showed the level of obstruction, and showed the cause of obstruction. In all 20 healthy volunteers and all 45 patients, the upper, middle, and lower group of renal calices and the pelvis were clearly revealed by HAS...Continue Reading

Citations

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