Fig. 1

Various grades of GS synovial hyperplasia and PD synovitis, as a proportion of all findings. a Grade 1, grade 2, and grade 3 GS synovial hyperplasia, as a proportion of all findings for MCP1–5, PIP1–5 and wrist joints. b Grade 1, grade 2, and grade 3 PD synovitis, as a proportion of all findings for MCP1–5, PIP1–5, and wrist joints. Abbreviations: GS gray scale, PD power Doppler, MCP metacarpophalangeal, PIP proximal interphalangeal