title: MR cholangiopancreaticography and endoscopic retrograde cholangiopancreaticography in patients with suspected common bile duct stones.
abstract: OBJECTIVE
  To prospectively compare MR cholangiopancreaticography (MRCP) vs. endoscopic retrograde pancreaticography (ERCP) in patients with suspected common bile duct (CBD) stone disease.
  
  
  METHODS
  Fifty consecutive patients with suspected CBD disease underwent MRCP and then ERCP within 12 h of each other. The result of the MRCP was blinded to the reader of the ERCP. The MRCP was done using a superconducting 1.0 T unit with a heavily T2-weighted breath-hold technique. The ERCP was done in the fluoroscopy suite by one of the clinicians and was evaluated by one of the radiologists who had not read the MRCP examinations.
  
  
  RESULTS
  There were 28 true-positives, 17 true-negatives, 1 false-positive, and 4 false-negatives. The sensitivity was 87.5% and the specificity 94.4%, respectively. The positive predictive value was 96.6% and the negative predictive value was 81.1%.
  
  
  CONCLUSIONS
  MRCP was shown to be good enough to replace ERCP as a diagnostic method in patients with suspected CBD disease. MRCP is now our modality of choice after ultrasound in the diagnostic evaluation of these patients.
authors.affiliation: Department of Radiology, Aker Hospital, University of Oslo, Norway.
authors.forename: M G
authors.initials: MG
authors.lastname: Stiris
authors.forename: B
authors.initials: B
authors.lastname: Tennøe
authors.forename: E
authors.initials: E
authors.lastname: Aadland
authors.forename: O C
authors.initials: OC
authors.lastname: Lunde
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D005471:Fluoroscopy; D042882:Gallstones / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D016037:Single-Blind Method