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. 2020 Apr 11;7(2):027001. doi: 10.1117/1.JMI.7.2.027001

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Fig. 6 — Fractal branches curve-fitting for: (a) $N_{0} = 200$ and $b = 2.5$ . Curve-fit parameters: $\hat{b} = 2.341$ , $λ = 1412$ . Goodness of fit: $R^{2} = 0.9869$ , root mean square error $(RMSE) = 0.2088$ . (b) $N_{0} = 300$ and $b = 2.5$ . Curve-fit parameters: $\hat{b} = 4.048$ , $λ = 2980$ . Goodness of fit: $R^{2} = 0.9954$ , $RMSE = 0.1059$ . (c) $N_{0} = 400$ and $b = 2.5$ . Curve-fit parameters: $\hat{b} = 5.593$ , $λ = 4280$ . Goodness of fit: $R^{2} = 0.996$ , $RMSE = 0.08801$ .