Fig. 1From: Early detection of osteoarthritis in rabbits using MRI with a double-contrast agentMR images from the present study. Representative proton density-weighted images are shown. The top row shows MR images of the control, the 2-w OA and 4-w OA before contrast agent injection, and the bottom row after contrast agent injection. The arrows indicate the surface of the cartilage in the control, 2-w OA and 4-w OA. Scale bar, 1Â cm. Ant. = anterior, Post. = posterior, Prox. = proximal, and Dist. = distalBack to article page