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US and MRI in renal obstruction evaluation.
Marina Budau1, Mihaela Onu, Viorel Jinga
1Clinical Hospital Th. Burghele, Bucharest, Romania. aproiect@itcnet.ro
Summary
Doppler Ultrasound (US) effectively detects renal obstruction early, even before collecting system dilation. Combining Doppler US and Magnetic Resonance Imaging (MRI) aids in evaluating anatomical and functional changes in renal obstruction.
Area of Science:
- Nephrology
- Radiology
- Medical Imaging
Background:
- Renal obstruction evaluation requires both anatomical and functional assessment.
- Contrast media can pose risks for certain patient groups.
Purpose of the Study:
- To evaluate renal obstruction using Magnetic Resonance Imaging (MRI) for anatomy and Doppler Ultrasound (US) for function.
- To assess the diagnostic capabilities of combined US and MRI in renal obstruction.
Main Methods:
- Investigated 32 patients with confirmed renal obstruction.
- Utilized Doppler US for functional assessment (Resistive Index).
- Employed MR urography for anatomical evaluation of the urinary collecting system.
Main Results:
- Doppler US indicated increased renal vascular resistance in all patients (Resistive Index = 0.74 +/- 0.02).
- MR urography identified urinary collecting system dilation in 20 out of 32 patients.
Conclusions:
- Doppler US demonstrates high sensitivity for detecting renal obstruction prior to collecting system dilation.
- Combined US and MR urography provide comprehensive anatomical and functional insights into renal obstruction.
- These imaging modalities are valuable alternatives for patients with contrast media intolerance.