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Fig. 4 —Comparing manually measured body mass index (BMI) and automatic computer-assisted diagnosis (CAD) calculation illustrates that CAD system reliability matches manual BMI measurements. Test was used as initial validation of segmentation procedure and shows that CAD system developed produces reliable measurements. See text for full discussion. = best 21 data sets, • = rest of full 42 data sets, broken trend line = best 21 data sets, solid trend line = full 42 data sets.