. Author manuscript; available in PMC: 2009 Oct 1.

Published in final edited form as: Acad Radiol. 2008 Oct;15(10):1234–1245. doi: 10.1016/j.acra.2008.04.016

Table A1.

Average difference in feature values between outlines generated using the center of the lesion and outlines generated using a random point within the lesion. Feature values have been normalized to between zero and one.

Feature Difference
Random Seedpoint Constraint	D2W		RGI		MSD		Corrl
Random Seedpoint Constraint	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Quarter-size Mask	< 0.001	0.053	0.001	0.085	-0.002	0.057	0.002	0.110
Half-size Mask	< 0.001	0.060	0.005	0.098	-0.002	0.066	< 0.001	0.120

D2W: Depth-to-width ratio (shape)

RGI: Radial gradient index (shape and sharpness)

MSD: Maximum side difference (posterior acoustic behavior)

Corrl: Autocorrelation in depth direction (texture and shape)