To evaluate the utility of volumetric histogram analysis originated from reduced field-of-view (r-FOV) diffusion-weighted (DW) imaging for small (< 4cm) solid renal mass subtypes at 3-T MR. Differences of ADC histogram parameters among different subtypes of renal tumor were compared. Benign tumors had significantly lower mean ADC, median ADC, 10th, 25th, 75th, 90th percentiles ADC, SD and entropy values compared to malignant tumors. ADC histogram analysis of the entire lesion was complementary to the mean ADC measure and may have a certain value to help differentiate the majority of subtypes of small solid renal tumor.
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