title: Helical computed tomographic cholangiography versus endosonography for suspected bile duct stones: a prospective blinded study in non-jaundiced patients.
abstract: BACKGROUND
  Helical computed tomography performed after intravenous administration of a cholangiographic contrast material (HCT-cholangiography) may be useful for detecting bile duct stones in non-jaundiced patients. However, this method has never been compared with other non-invasive biliary imaging tests.
  
  
  OBJECTIVE
  To compare prospectively HCT-cholangiography and endosonography (EUS) in a group of non-jaundiced patients with suspected bile duct stones.
  
  
  METHODS
  Fifty two subjects underwent both HCT-cholangiography and EUS. Endoscopic retrograde cholangiography (ERCP), with or without instrumental bile duct exploration, served as a reference method, and was successful in all but two patients.
  
  
  RESULTS
  Thirty four patients (68%) were found to have choledocholithiasis at ERCP. The sensitivity for HCT-cholangiography in stone detection was 85%, specificity 88%, and accuracy 86%. For EUS the sensitivity was 91%, specificity 100%, and accuracy 94%. The differences were not significant. No serious complications occurred with either method.
  
  
  CONCLUSIONS
  HCT-cholangiography and EUS are safe and comparably accurate methods for detecting bile duct stones in non-jaundiced patients.
authors.affiliation: Department of Gastroenterology, Medical Centre for Postgraduate Education, Institute of Oncology, Warsaw, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Polkowski
authors.forename: J
authors.initials: J
authors.lastname: Palucki
authors.forename: J
authors.initials: J
authors.lastname: Regula
authors.forename: A
authors.initials: A
authors.lastname: Tilszer
authors.forename: E
authors.initials: E
authors.lastname: Butruk
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001649:Bile Duct Diseases / Q000000981:diagnostic imaging*; D002758:Cholangiography; D002760:Cholangiopancreatography, Endoscopic Retrograde; D002769:Cholelithiasis / Q000000981:diagnostic imaging*; D019160:Endosonography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed