title: CT urography and hematuria: a retrospective analysis of 771 patients undergoing CT urography over a 1-year period.
abstract: BACKGROUND
  Computed tomography (CT) urography is now used in the work-up of patients with hematuria. The dose of contrast medium and radiation varies considerably between the different CT protocols.
  
  
  OBJECTIVE
  To study the disease prevalence in a consecutive group of patients with hematuria undergoing CT urography with a low dose of contrast medium and radiation.
  
  
  METHODS
  From 1 April 2007 to 31 March 2008, using the Radiological Information System (RIS) as well as electronic patient records, demographic data, reason for referral, and diagnosis were obtained for all patients undergoing CT urography due to hematuria. The patients were followed for 3 years.
  
  
  RESULTS
  A total of 771 patients had hematuria diagnosed at the time of referral. In 137 patients (18%), a tumor and / or a complex cyst was found in the urinary tract (renal, ureteral, or bladder), in 68 (9%) a calculi, in 118 (15%) other disease (i.e. infection or anomaly) was found. No abnormalities were found at CT urography in 455 (58%) of the patients with hematuria. Lesions were found more frequently in patients with visible hematuria than in patients with non-visible hematuria (48% vs. 29%). No malignant tumor or complex cyst was found in the kidneys or the ureters in patients with nonvisible hematuria.
  
  
  CONCLUSIONS
  CT urography with its low dose of contrast medium and radiation is a useful diagnostic imaging test for investigating patients with hematuria.
authors: Department of Diagnostic Radiology, Copenhagen University Hospital Herlev, Herlev, Denmark thomas.bretlau@regionh.dk.
authors: Thomas
authors: T
authors: Bretlau
authors: Department of Diagnostic Radiology, Copenhagen University Hospital Herlev, Herlev, Denmark.
authors: Rasmus H
authors: RH
authors: Hansen
authors: Department of Diagnostic Radiology, Copenhagen University Hospital Herlev, Herlev, Denmark.
authors: Henrik S
authors: HS
authors: Thomsen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media; D005260:Female; D005500:Follow-Up Studies; D006417:Hematuria / Q000150:complications*; D006801:Humans; D007479:Iopamidol / Q000031:analogs & derivatives; D008297:Male; D008875:Middle Aged; D011856:Radiographic Image Enhancement; D015203:Reproducibility of Results; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*; D001749:Urinary Bladder Neoplasms; D014567:Urography / Q000379:methods*; D014570:Urologic Diseases / Q000150:complications / Q000000981:diagnostic imaging*; D014571:Urologic Neoplasms / Q000150:complications / Q000000981:diagnostic imaging*; D055815:Young Adult
chemical_list: D003287:Contrast Media; C057937:iomeprol; D007479:Iopamidol
keywords: CT urography; renal cell carcinoma; urothelial carcinoma; visible hematuria and non-visible hematuria