title: Developing a magnetic resonance imaging scoring system for peripheral psoriatic arthritis.
abstract: We describe the first steps in developing an OMERACT magnetic resonance imaging (MRI) scoring system for peripheral psoriatic arthritis (PsA). A preexisting MRI dataset (finger joints) from 10 patients with PsA was scored by 4 readers for bone erosion, bone edema, synovitis, tendinopathy, and extracapsular features of inflammation (including enthesitis) according to specified criteria. Scoring reliability between readers was moderate to high for bone edema and erosion, but lower for soft tissue inflammation. Measures to improve reliability for future exercises will include reviewing definitions of pathological features and prior reader calibration.
authors.affiliation: Department of Rheumatology, Auckland University, Auckland, New Zealand. f.mcqueen@auckland.ac.nz
authors.forename: Fiona
authors.initials: F
authors.lastname: McQueen
authors.forename: Marissa
authors.initials: M
authors.lastname: Lassere
authors.forename: Paul
authors.initials: P
authors.lastname: Bird
authors.forename: Espen A
authors.initials: EA
authors.lastname: Haavardsholm
authors.forename: Charles
authors.initials: C
authors.lastname: Peterfy
authors.forename: Philip G
authors.initials: PG
authors.lastname: Conaghan
authors.forename: Bo
authors.initials: B
authors.lastname: Ejbjerg
authors.forename: Harry
authors.initials: H
authors.lastname: Genant
authors.forename: Philip
authors.initials: P
authors.lastname: O'Connor
authors.forename: Paul
authors.initials: P
authors.lastname: Emery
authors.forename: Mikkel
authors.initials: M
authors.lastname: Østergaard
mesh_terms: D015535:Arthritis, Psoriatic / Q000145:classification / Q000473:pathology*; D002138:Calibration; D005384:Finger Joint / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015588:Observer Variation; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013585:Synovitis / Q000473:pathology*; D052256:Tendinopathy