title: US and MRI in renal obstruction evaluation.
abstract: OBJECTIVE
  To explore the renal obstruction using MRI (Magnetic Resonance Imaging) for anatomical evaluation and Doppler US (Ultra Sound) for functional evaluation.
  
  
  METHODS
  Thirty-two patients with renal obstruction were investigated. The presence of renal obstruction was subsequently established by excretory urography or surgery. US studies were performed using a B&K Medical ultrasound system Panther 2002 equipped with 3 Mhz transducer. MR urography was done with a magnetic resonance imaging system 0.28T, Tomikon R28-Bruker, Germany.
  
  
  RESULTS
  All 30 patients presented increased renal vascular resistance as determined by US evaluation (Resistive Index = 0.74 +/- 0.02). The MR urography proved dilated urinary collecting system in only 20 patients of the group.
  
  
  CONCLUSIONS
  Doppler US has a very good sensitivity in detecting the renal obstruction before the dilatation of the collecting system be installed. Used together these methods (US and MR urography) are important for proving anatomical as well as functional changes in renal obstruction. Both methods could be useful mainly in patients with known intolerance to contrast media.
authors.affiliation: Clinical Hospital Th. Burghele, Bucharest, Romania. aproiect@itcnet.ro
authors.forename: Marina
authors.initials: M
authors.lastname: Budau
authors.forename: Mihaela
authors.initials: M
authors.lastname: Onu
authors.forename: Viorel
authors.initials: V
authors.lastname: Jinga
authors.forename: Bogdan
authors.initials: B
authors.lastname: Braticevici
authors.forename: Tiberiu
authors.initials: T
authors.lastname: Pop
mesh_terms: D004108:Dilatation, Pathologic / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000517:prevention & control; D004232:Diuretics / Q000494:pharmacology; D005665:Furosemide / Q000494:pharmacology; D005919:Glomerular Filtration Rate / Q000187:drug effects; D006801:Humans; D007674:Kidney Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D007685:Kidney Tubules, Collecting / Q000000981:diagnostic imaging / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D012079:Renal Circulation; D012680:Sensitivity and Specificity; D018608:Ultrasonography, Doppler; D014567:Urography; D014655:Vascular Resistance
chemical_list: D004232:Diuretics; D005665:Furosemide