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. 2015 Apr 28;20(4):046014. doi: 10.1117/1.JBO.20.4.046014

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Fig. 4 — Scatter plot of mean nuclear area for manually and automatically selected frames from the esophageal data set. The regression line is shown; $y = 0.83 x + 28$ and $R^{2} = 0.81$ .