RT Journal Article SR Electronic T1 Testing an OMERACT MRI Scoring System for Peripheral Psoriatic Arthritis in Cross-sectional and Longitudinal Settings JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1811 OP 1815 DO 10.3899/jrheum.090351 VO 36 IS 8 A1 McQUEEN, FIONA A1 LASSERE, MARISSA A1 DUER-JENSEN, ANNE A1 WIELL, CHARLOTTE A1 CONAGHAN, PHILIP G. A1 GANDJBAKHCH, FRÉDÉRIQUE A1 HERMANN, KAY-GEERT A. A1 BIRD, PAUL A1 BØYESEN, PERNILLE A1 PETERFY, CHARLES A1 EJBJERG, BO A1 HAAVARDSHOLM, ESPEN A. A1 COATES, LAURA A1 ØSTERGAARD, MIKKEL YR 2009 UL http://www.jrheum.org/content/36/8/1811.abstract AB Objective. Magnetic resonance imaging (MRI) is increasingly used to measure articular inflammation and damage in patients with psoriatic arthritis (PsA). We evaluated the reliability of a new OMERACT PsA MRI scoring system, PsAMRIS, in PsA fingers. Methods. In 2 separate studies, MRI scans were obtained from patients with clinical evidence of synovitis or dactylitis of the fingers. For the first cross-sectional study, images were obtained at one timepoint. For the second longitudinal study, images were obtained at 2 timepoints, 6 weeks apart. Scans were scored using PsAMRIS in an international multireader setting, for synovitis, tenosynovitis, periarticular inflammation, bone edema, bone erosions, and bone proliferation. Results. Global status scores from both datasets revealed moderate to high reliability for scoring most features, although reliability was poor for periarticular inflammation in the cross-sectional study. Change scores that reflected inflammatory activity also exhibited moderate to good reliability in the longitudinal exercise, despite there being very little absolute change in MRI synovitis or tenosynovitis observed in this dataset. At the distal interphalangeal joints, reliability for change scores was acceptable only for synovitis and tenosynovitis. Conclusion. Further development and testing of the PsAMRIS is planned to improve its performance as a clinical and research tool to identify and measure pathology in peripheral joint PsA.