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  • Title: Dilated renal collecting systems: differentiating obstructive from nonobstructive dilation using duplex Doppler ultrasound.
    Author: Bude RO, Platt JF, Rubin JM, Ohl DA.
    Journal: Urology; 1991 Feb; 37(2):123-5. PubMed ID: 1992579.
    Abstract:
    Two patients with ileal loop urinary diversions, studied with real-time and Doppler sonography ("duplex sonography") of the kidneys, were shown to have dilated intrarenal collecting systems. Resistive index measurements calculated from the Doppler signal correctly identified obstructive dilatation in 1 case and nonobstructive dilatation in the other.
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