Figure 2.

Schematic illustration of articular cartilage analysis and measurement methods of cartilage samples used in [13]. A reflex echo of articular cartilage (upper) and a wavelet map (lower) are shown on the right. The maximum magnitude is indicated by the gray scale and the percentage maximum magnitude (the maximum magnitude of the measurement area divided by that of the intact cartilage of the nonoperated knee; %MM) is used as a quantitative index of cartilage regeneration.