Table IV.

Quantitative ultrasound (QUS) parameters for phantom A. D_KL, Kullback–Leibler cost function; μ, shape parameter of Nakagami distribution; p_L probability density function of the signals scattered from normal liver; p_F, probability density function of signals scattered from lipid droplets; μ_L, density of normal liver; μ_F, density of lipid droplets; (1 − α)ω_L, intensity of echo signals from normal liver; αω_F, intensity of echo signals from lipid droplets.

	L22-14vX	L35-16vX	L38-22v	L39-21gD	MS550D
DKL-Rayleigh	0.20 ± 0.16	0.15 ± 0.15	0.17 ± 0.15	0.25 ± 0.20	0.20 ± 0.19
DKL-Nakagami	0.13 ± 0.11	0.11 ± 0.10	0.11 ± 0.09	0.19 ± 0.17	0.14 ± 0.15
DKL-DN	0.23 ± 0.19	0.22 ± 0.17	0.19 ± 0.15	0.25 ± 0.19	0.20 ± 0.17
Nakagami—μ	0.96 ± 0.05	0.98 ± 0.05	0.98 ± 0.05	0.97 ± 0.07	0.96 ± 0.05
DN-μl	0.99 ± 0.07	1.00 ± 0.06	1.00 ± 0.08	1.00 ± 0.08	1.00 ± 0.08
(1–α)ωL	0.80 ± 0.22	0.80 ± 0.23	0.79 ± 0.24	0.80 ± 0.21	0.80 ± 0.23
αω F	0.43 ± 0.31	0.45 ± 0.32	0.41 ± 0.31	0.43 ± 0.28	0.41 ± 0.30