Fig. 1From: Ultrasound detects synovitis in replaced and other surgically operated joints in rheumatoid arthritis patientsSynovitis detectable by ultrasound of the lateral knee. Left column, Power Doppler ultrasound (PDUS) and grayscale ultrasound (GSUS) of replaced joint, Grade 3 (severe synovitis). Middle column, PDUS and GSUS of native joint, Grade 0 (no synovitis). Right column, PDUS and GSUS of native joint, Grade 3 (severe synovitis). Yellow star indicates the location of the prosthesisBack to article page