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(Radiology. 1999;210:727-731.)
© RSNA, 1999

Ultrasonography

Crossing Vessels at the Ureteropelvic Junction: Detection with Contrast-enhanced Color Doppler Imaging

Ferdinand Frauscher, MD1, Günter Janetschek, MD2, Gernot Helweg, MD1, Hannes Strasser, MD2, Georg Bartsch, MD2 and Dieter zur Nedden, MD1

1 Departments of Radiology II (F.F., G.H., D.z.N.)
2 Urology (G.J., H.S., G.B.), University Hospital Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria.

PURPOSE: To investigate the feasibility of imaging crossing vessels at the ureteropelvic junction (UPJ) preoperatively by means of contrast agent–enhanced color Doppler imaging (CDI).

MATERIALS AND METHODS: Twenty-nine patients (13 female patients, 16 male patients; age range, 17–76 years; mean age, 45 years) with symptomatic UPJ obstruction were examined with CDI before and after intravenous infusion of the contrast agent. The type (ie, arterial or venous) and position of the vessel relative to the UPJ (ie, anterior or posterior) were assessed. The CDI findings were correlated with the surgical findings at laparoscopic pyeloplasty.

RESULTS: Among the 29 patients, crossing vessels were detected with nonenhanced CDI in 15 patients, with enhanced CDI in 22 patients, and with laparoscopy in 23 patients. Enhanced CDI depicted crossing vessels in 22 (96%) of the 23 laparoscopically confirmed cases compared with nonenhanced CDI, which depicted 15 (65%) of the 23 cases. The rate of detecting crossing vessels increased significantly with use of the contrast agent (P < .016, McNemar test).

CONCLUSION: Compared with nonenhanced CDI, contrast-enhanced CDI significantly improves the detection of crossing vessels at the UPJ and is useful in the presurgical evaluation of UPJ obstruction.

Index terms: Kidney, stenosis or obstruction, 812.842, 813.842 • Renal arteries, US, 961.12983, 961.12988 • Renal veins, US, 966.12983, 966.12988 • Ultrasound (US), contrast media, 821.12983, 821.12988, 961.12983, 961.12988, 966.12983, 966.12988 • Ultrasound (US), Doppler studies, 821.12983, 821.12988, 961.12983, 961.12988, 966.12983, 966.12988 • Ureter, stenosis or obstruction, 821.842




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F. Frauscher, O. Rouvière, D. Lyonnet, P. Berger, C. Pangaud, A. Gelet, and X. Martin
Value of Contrast-enhanced Color Doppler Imaging for Detection of Crossing Vessels in Patients with Ureteropelvic Junction Obstruction Dr Rouviere and colleagues respond:
Radiology, December 1, 2000; 217(3): 916 - 917.
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