Miniaturized Water-Jet Ultrasound Indentation System for Quantitative Assessment of Articular Cartilage Degeneration: A Validation Study

Figure 8

(a) A 3D scatter plot of three parameters IRC, stiffness, and EDR in normal and degenerated cartilage after trypsin and collagenase digestion. The corresponding projection of the 3D data sets into a 2-D plane in terms of mean and standard deviations of different groups are also plotted in (b) IRC vs. stiffness, (c) IRC vs. EDR, and (d) stiffness vs. EDR. Normal cartilages included those before the trypsin digestion and those before the collagenase digestion. NOR: normal, AFT_TRY: trypsin-digested samples, AFT-COL: collagenase-digested samples.

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