Diffusion-weighted MR imaging and Doppler ultrasonography in the evaluation of renal parenchyma in acute XXXX .

@entity1 @entity1290 @entity1695
OBJECTIVE: To compare the efficacy of diffusion-weighted (DW) magnetic resonance (MR) imaging and Doppler ultrasonography (US) by using quantitative markers in acute unilateral obstruction due to @entity1290 . METHODS: This prospective study included 28 @entity1 with unilateral @entity1695 and 18 healthy control subjects. In Doppler US and DW MR imaging, resistive index (RI) and apparent diffusion coefficient (ADC) values were measured respectively. The results were compared in @entity1 and in control subjects. Paired samples test, two-tailed unpaired Student's t test and Spearman analysis were performed for statistical analysis. RESULTS: The mean RI in the 28 obstructed kidneys was significantly higher than the mean RI in unobstructed kidneys and in control subjects (P < 0.05). The ADC of obstructed kidneys in the cortex was significantly lower than the ADC of the contralateral unobstructed kidneys (P < 0.05). The ADC of unobstructed kidneys was significantly higher than the ADC of control subjects in the cortex (P < 0.05). RI and ADC values yielded no significant correlation. CONCLUSION: Doppler US and DW MR imaging provide accurate and noninvasive diagnosis, Doppler US may be preferred as it is a more practical technique compared to DW MR imaging in the evaluation of acute @entity1695 due to @entity1290 .
