RT Journal Article SR Electronic T1 Developing a magnetic resonance imaging scoring system for peripheral psoriatic arthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 859 OP 861 VO 34 IS 4 A1 McQueen, Fiona A1 Lassere, Marissa A1 Bird, Paul A1 Haavardsholm, Espen A A1 Peterfy, Charles A1 Conaghan, Philip G A1 Ejbjerg, Bo A1 Genant, Harry A1 O'Connor, Philip A1 Emery, Paul A1 Østergaard, Mikkel YR 2007 UL http://www.jrheum.org/content/34/4/859.abstract AB 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.