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. 2022 Aug 4;12(8):1891. doi: 10.3390/diagnostics12081891

Figure 3.

Figure 3

Imaging examples. Conventional CT subtraction for 80 and 135 kVp. Virtual monochromatic imaging CT subtraction for 70 and 50 keV. MSUS: musculoskeletal ultrasound of the metacarpophalangeal (MCP) joint II from the dorsal view. (A) Imaging examples of a 51-years old patient with seropositive rheumatoid arthritis. No inflammatory activity was detected. (B) Imaging examples of a 62-years old patient with treatment-naïve seronegative rheumatoid arthritis. Severe synovitis was detected at the metacarpophalangeal (MCP) joint III and II (arrows) and wrist (arrowhead). In 135 kVp, the synovitis in these regions was underestimated. MSUS of the MCP II joint showed synovitis and peritendonitis with severe power Doppler activity.