title: A multireader reliability study comparing conventional high-field magnetic resonance imaging with extremity low-field MRI in rheumatoid arthritis.
abstract: The use of extremity low-field magnetic resonance imaging (E-MRI) is increasing, but relatively few data exist on its reproducibility and accuracy in comparison with high-field MRI, especially for multiple readers. The aim of this multireader exercise of rheumatoid arthritis wrist and metacarpophalangeal joints was to assess the intermachine (high vs low-field) agreement and to assess the interreader agreement on high and low-field images. Study findings suggested that E-MRI performs similarly to conventional high-field MRI regarding assessment of bone erosions. However, for synovitis and bone edema, considerable intermachine and interreader variability was found. Further studies are needed before recommendations on multireader E-MRI assessment of these pathologies can be given.
authors.affiliation: Department of Rheumatology, St. George Hospital, University of New South Wales, Sydney, Australia. p.bird@unsw.edu.au
authors.forename: Paul
authors.initials: P
authors.lastname: Bird
authors.forename: Bo
authors.initials: B
authors.lastname: Ejbjerg
authors.forename: Marissa
authors.initials: M
authors.lastname: Lassere
authors.forename: Mikkel
authors.initials: M
authors.lastname: Østergaard
authors.forename: Fiona
authors.initials: F
authors.lastname: McQueen
authors.forename: Charles
authors.initials: C
authors.lastname: Peterfy
authors.forename: Espen
authors.initials: E
authors.lastname: Haavardsholm
authors.forename: Philip
authors.initials: P
authors.lastname: O'Connor
authors.forename: Harry
authors.initials: H
authors.lastname: Genant
authors.forename: John
authors.initials: J
authors.lastname: Edmonds
authors.forename: Paul
authors.initials: P
authors.lastname: Emery
authors.forename: Philip G
authors.initials: PG
authors.lastname: Conaghan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008662:Metacarpophalangeal Joint / Q000473:pathology*; D008875:Middle Aged; D015588:Observer Variation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013585:Synovitis / Q000175:diagnosis / Q000473:pathology*; D014955:Wrist Joint / Q000473:pathology*