PT - JOURNAL ARTICLE AU - FIONA McQUEEN AU - MARISSA LASSERE AU - ANNE DUER-JENSEN AU - CHARLOTTE WIELL AU - PHILIP G. CONAGHAN AU - FRÉDÉRIQUE GANDJBAKHCH AU - KAY-GEERT A. HERMANN AU - PAUL BIRD AU - PERNILLE BØYESEN AU - CHARLES PETERFY AU - BO EJBJERG AU - ESPEN A. HAAVARDSHOLM AU - LAURA COATES AU - MIKKEL ØSTERGAARD TI - Testing an OMERACT MRI Scoring System for Peripheral Psoriatic Arthritis in Cross-sectional and Longitudinal Settings AID - 10.3899/jrheum.090351 DP - 2009 Aug 01 TA - The Journal of Rheumatology PG - 1811--1815 VI - 36 IP - 8 4099 - http://www.jrheum.org/content/36/8/1811.short 4100 - http://www.jrheum.org/content/36/8/1811.full SO - J Rheumatol2009 Aug 01; 36 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.