title: MRI in ankylosing spondylitis.
abstract: OBJECTIVE
  The past 18 months have seen multireader validation exercises assessing the reliability and discriminatory properties of MRI, longitudinal data evaluating the prognostic significance of lesions observed on MRI, and data from clinical trials assessing the predictive capacity of MRI for major clinical response. Studies using new MRI-based technologies in ankylosing spondylitis have also been described.
  
  
  RESULTS
  The reliability and discrimination of scoring systems for both sacroiliac joint and spinal inflammation using MRI are now sufficiently well validated to be used in the short-term clinical trial assessment of the anti-inflammatory efficacy of novel therapeutic agents. The finding of inflammatory lesions on MRI is also of prognostic significance for structural damage. MRI examination contributes to clinical and laboratory evaluation in the selection of patients likely to respond to antitumor necrosis factor agents. Newer MRI-based techniques such as whole-body MRI permit a broader scope of diagnostic ascertainment.
  
  
  CONCLUSIONS
  MRI continues to assume an increasingly important role in the diagnostic, prognostic, and therapeutic assessment of patients with ankylosing spondylitis.
authors.affiliation: Department of Medicine, University of Alberta, Edmonton, Alberta, Canada. walter.maksymowych@ualberta.ca
authors.forename: Walter P
authors.initials: WP
authors.lastname: Maksymowych
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods* / Q000639:trends*; D017063:Outcome Assessment, Health Care / Q000379:methods; D011237:Predictive Value of Tests; D011379:Prognosis; D015203:Reproducibility of Results; D013131:Spine / Q000187:drug effects / Q000473:pathology* / Q000503:physiopathology; D013167:Spondylitis, Ankylosing / Q000175:diagnosis* / Q000628:therapy; D016896:Treatment Outcome