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Use of magnetic resonance urography
L T Klein1, D Frager, A Subramanium
1Department of Urology, St. Lukes-Roosevelt Hospital Center and Columbia University College of Physicians and Surgeons, New York, New York, USA.
Urology
|October 8, 1998
Summary
Magnetic resonance urography (MRU) is a safe alternative for diagnosing urinary tract issues like hematuria, offering high-resolution imaging without contrast agents. This technique shows promise for patients with contraindications to traditional methods.
Area of Science:
- Urology
- Radiology
- Medical Imaging
Background:
- Magnetic resonance urography (MRU) is an emerging imaging technique utilizing T2-weighted sequences with fat suppression.
- Urine is visualized as bright on MRU, similar to intravenous urograms (IVUs), without requiring contrast agents.
Purpose of the Study:
- To evaluate the utility of MRU in diagnosing and managing patients presenting with hematuria.
- To assess the effectiveness of MRU compared to other imaging modalities.
Main Methods:
- One hundred six patients with hematuria and 6 volunteers underwent MRU using a modified T2 technique with furosemide and ureteral compression.
- Thirty-two patients had comparative imaging studies performed.
Main Results:
- MRU yielded high-resolution images in most cases, with 69% showing normal findings.
- Abnormalities detected included renal cysts (51%), renal cell carcinoma (18%), transitional cell carcinoma (15%), and obstructive stones (18%).
- Visualization of the urinary tract was good even in patients with renal failure.
Conclusions:
- MRU serves as a viable alternative to conventional urinary tract imaging, particularly for patients with contraindications to radiation or contrast agents.
- Further advancements in MRU resolution, technique, and cost-effectiveness are needed for routine urological practice.