Fig. 3.

Graphs of measured water (a) and lipid (b) fractions with (round) data points and standard deviations based on 10 measurements from the top of the phantoms. The dotted line is a linear fit for the phantoms with the higher water content before mixing, exhibiting good linearity. The x-shaped data points and corresponding dashed linear fit for the high lipid content phantoms were obtained after their materials were manually mixed. The solid line depicts the actual water or lipid content.