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Extremity magnetic resonance imaging assessment of synovitis (without contrast) in rheumatoid arthritis may be less accurate than power Doppler ultrasound
  1. J E Freeston,
  2. A K Brown,
  3. E M A Hensor,
  4. P Emery,
  5. P G Conaghan
  1. Academic Unit of Musculoskeletal Disease, Chapel Allerton Hospital, Leeds, UK
  1. Professor Philip Conaghan, MBBS PhD FRACP FRCP, Professor of Musculoskeletal Medicine, Academic Unit of Musculoskeletal Disease, Chapel Allerton Hospital, Chapeltown Road, Leeds LS7 4SA, UK; p.conaghan{at}

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Although synovitis detection is optimal with contrast-enhanced, high field magnetic resonance imaging (MRI), the increased accessibility of power Doppler ultrasound (PDUS) has meant that it is more frequently utilised in the clinical setting. However, with the advent of low field extremity MRI (eMRI) and its practical advantages,1 there is a need to understand what is the most sensitive tool for routine clinical use. eMRI has been evaluated with respect to its ability to assess rheumatoid arthritis erosions in comparison with both high field MRI and radiography.24 There is relatively little published work, however, on eMRI’s ability to assess synovitis in comparison with high field MRI,47 and three of these reports used intravenous contrast, which further limits feasibility. Only one group have published …

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  • Competing interests: None.

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