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Table 2 Detection of bone changes, visualized and scored with ultrasonography, by other imaging methods

From: Ultrasonography of the metacarpophalangeal and proximal interphalangeal joints in rheumatoid arthritis: a comparison with magnetic resonance imaging, conventional radiography and clinical examination

   Bone erosions on MRI Bone erosions on CR No bone erosions on MRI and CR
US grades Grade 1 (n = 16) 2 0 14
  Grade 2 (n = 55) 32 17 20
  Grade 3 (n = 26) 18 18 6
  1. CR, conventional radiography; MRI, magnetic resonance imaging; US, ultrasonography.