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[MR-urography and CT-urography: principles, examination techniques, applications].
C Nolte-Ernsting1, G Staatz, J Wildberger
1Klinik für Diagnostische und Interventionelle Radiologie, Universitätsklinikum Hamburg-Eppendorf, Hamburg. c.nolte-ernsting@uke.uni-hamburg.de
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|February 14, 2003
Summary
Magnetic resonance urography (MRU) and CT urography (CTU) offer advanced imaging of the upper urinary tract. These techniques provide superior visualization compared to conventional methods, aiding in diagnosing various urological conditions.
Area of Science:
- Uroradiology
- Medical Imaging
Context:
- Conventional intravenous urography (IVU) has limitations in visualizing the upper urinary tract.
- MR urography (MRU) and CT urography (CTU) offer advanced imaging capabilities.
- MRU and CTU provide refined imaging not achievable with conventional IVU.
Purpose:
- To compare the efficacy of MR urography (MRU) and CT urography (CTU) in imaging the upper urinary tract.
- To highlight the advantages of MRU and CTU over conventional urography.
- To discuss the applications and future role of MRU and CTU in uroradiology.
Summary:
- MRU utilizes T2-weighted sequences for static fluid imaging and T1-weighted sequences with gadolinium for excretory urography, reflecting renal function.
- T1-weighted excretory MRU, often combined with furosemide, visualizes urine flow effectively, even in non-dilated or obstructed systems.
- Multislice CT urography (MS-CTU) is similar to T1-weighted MRU, can use furosemide, but is limited by radiation and contrast nephrotoxicity.
- Both MRU and MS-CTU are valuable for diagnosing tumors, assessing renal transplants, and evaluating chronic urolithiasis, with MRU replacing IVU in pediatric uroradiology.
Impact:
- MRU and CTU provide superior diagnostic information for upper urinary tract pathologies.
- These advanced imaging techniques are crucial for modern uroradiology, especially in pediatric cases and renal transplant assessment.
- MRU and CTU offer versatile applications, including tumor diagnosis and management of complex urological conditions.