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Table 3 Erosions detected by CT in joint quadrants and semi-quantitatively assessed according to the RAMRIS erosion score, and proportion of erosions detected by US

From: Ultrasonographic assessment of bone erosions in the different subtypes of systemic lupus erythematosus arthritis: comparison with computed tomography

RAMRIS erosion score Quadrants with CT erosion (n) US-detected erosions (%)
All areas   
 Grade 1 (1–10 %) 51 27.5
 Grade 2 (11 − 20 %) 31 41.9
 Grade 3 − 10 (21–100 %) 10 90.0a
Areas with best US reliabilityb   
 Grade 1 (1 − 10 %) 15 53.3
 Grade 2 (11 − 20 %) 15 60.0
 Grade 3 − 10 (21 − 100 %) 5 100.0
  1. aOnly one large computed tomography (CT)-detected erosion (grade 3) at the third metacarpophalangeal join (MCP) was not identified by ultrasound (US) because the cortical break was not accessible to US. bSecond MCP and fifth MCP quadrants. RAMRIS rheumatoid arthritis magnetic resonance imaging score