Increased blood flow signals on power Doppler ultrasonography in the proliferated synovium (pannus) of patients with rheumatoid arthritis (RA) have been used to evaluate articular inflammation.^1–,⁷ Fiocco et al⁵ reported that, in patients with RA after 3 months of etanercept treatment, superficial layer vascularity of the knee joint pannus⁸ was significantly reduced, and this occurred before deep-layer vascularity was affected. In all, 97 knee joints of 52 patients with RA were scanned longitudinally and transversely at suprapatellar recess; …