title: MR cholangiography (MRC) in the evaluation of CBD stones before laparoscopic cholecystectomy.
abstract: BACKGROUND
  The aim of our work was to evaluate the predictive value of MR cholangiography (MRC) in detecting CBD stones before laparoscopic surgical treatment.
  
  
  METHODS
  MRC was performed as a unique preoperative imaging modality in 45 selected patients (16 male; 29 female; age range: 28-72; mean age: 54.4) before laparoscopic cholecystectomy. MRC imaging was obtained with a 3D Turbo Spin-Echo sequence (TR = 3000 ms, TE = 700 ms, Echo Train Length--128) with an acquisition time of 5 min 48 s. Diagnostic confirmation was obtained in all the cases at i.o. cholangiography. When a stone was detected it was removed by transcystic or transcholedochal approach.
  
  
  RESULTS
  Eighteen of the 45 patients (40%) had CBD stones. MRC correctly evaluated 16 out of 18 stones, with a resulting sensitivity of 88.9%, specificity 100%, positive predictive value 100%, negative predictive value 90%, and accuracy 95.6%.
  
  
  CONCLUSIONS
  Despite the good results of MRC, it cannot be proposed as a screening technique to be performed in all patients submitted to laparoscopic cholecystectomy due to high cost and the limited amount of MR equipment. In conclusion, only selected patients should be submitted to MRC before laparoscopic cholecystectomy.
authors.affiliation: Department of Radiology--II Chair, University of Rome La Sapienza, Policlinico Umberto I, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Pavone
authors.forename: A
authors.initials: A
authors.lastname: Laghi
authors.forename: D
authors.initials: D
authors.lastname: Lomanto
authors.forename: F
authors.initials: F
authors.lastname: Fiocca
authors.forename: V
authors.initials: V
authors.lastname: Panebianco
authors.forename: C
authors.initials: C
authors.lastname: Catalano
authors.forename: P
authors.initials: P
authors.lastname: Mazzocchi
authors.forename: R
authors.initials: R
authors.lastname: Passariello
mesh_terms: D000328:Adult; D000368:Aged; D002758:Cholangiography / Q000379:methods*; D017081:Cholecystectomy, Laparoscopic / Q000379:methods*; D005189:False Positive Reactions; D005260:Female; D042882:Gallstones / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D007091:Image Processing, Computer-Assisted; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012189:Retrospective Studies