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Indentation raw data set (A) and processed data points for calculating elasticity (B) for the 15% Gelatin phantom with a R = 2.4 mm indenter. Note that due to the spherical shape of the indenter, the displacement-load curve is nonlinear in (A). In (B), the slope term of the linear regression estimates the material elasticity μ1. In this figure, μ1 = 8.42 ± 0.03 kPa in the mean ± standard error format.
