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
| 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 |
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