title: Magnetic resonance enteroclysis in the diagnosis of small-intestinal Crohn's disease: diagnostic accuracy and inter- and intra-observer agreement.
abstract: OBJECTIVE
  To evaluate the diagnostic accuracy and inter- and intra-observer agreement of magnetic resonance enteroclysis (MRE) in patients with or without Crohn's disease of the small intestine.
  
  
  METHODS
  60 consecutive patients with or without Crohn's disease examined with MRE were included. Two observers independently reviewed the MRE examinations, searching for 12 pathological signs. The reference standard was ileoscopy or surgery of the terminal ileum performed in 41 patients.
  
  
  RESULTS
  Crohn's disease of the small intestine was found in 24 (40%) patients. MRE findings of increased intestinal wall thickness, intestinal wall enhancement, intestinal wall ulcer, and inflammatory activity of the terminal ileum showed high sensitivity, specificity, and positive and negative predictive values. Intestinal stenosis had sensitivities ranging from 43% to 100%, depending on the cut-off value. Inter- and intra-observer agreement was good or excellent for most pathological signs. However, observer agreement of intestinal wall edema was only fair and moderate.
  
  
  CONCLUSIONS
  MRE evaluated Crohn's disease with a high diagnostic accuracy in the terminal ileum. Most MRE variables were evaluated with good or excellent observer agreement, indicating that the method was highly reproducible. Our study supports the notion that MRE is an appropriate method for diagnosing Crohn's disease.
authors.affiliation: Department of Radiology, Faculty Division Ullevål, University of Oslo, Oslo, Norway. anne.negard@medisin.uio.no
authors.forename: A
authors.initials: A
authors.lastname: Negaard
authors.forename: L
authors.initials: L
authors.lastname: Sandvik
authors.forename: A
authors.initials: A
authors.lastname: Mulahasanovic
authors.forename: A E
authors.initials: AE
authors.lastname: Berstad
authors.forename: N-E
authors.initials: NE
authors.lastname: Klöw
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003287:Contrast Media; D003424:Crohn Disease / Q000175:diagnosis*; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007421:Intestine, Small; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA