Figure 2.

Ultrasonography of the 2nd proximal interphalageal joint. The joint is visualized in sagittal (a,c) and axial (b,d) scans. In a gray-scale image (a), proximal and distal osteophytes are visible (arrows). Gray-scale synovitis is visible in both sagittal (a) and axial (b) planes (arrowheads). Power Doppler signal is visible in (c) and (d).

Haugen and Bøyesen Arthritis Research & Therapy 2011 13:248   doi:10.1186/ar3509
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