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. Author manuscript; available in PMC: 2019 Nov 1.

Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Sep 12;65(11):2042–2053. doi: 10.1109/TUFFC.2018.2869810

TABLE IX.

Uncertainties in STD and Bias of Layered Phantom with Uniform Attenuation. In each layer, the smallest values are highlighted in bold font.

	Layer 1		Layer 2		Layer 3
	LSq	DP	LSq	DP	LSq	DP
STD
α (dB/cm-MHz)	0.670	0.156	0.314	0.156	0.237	0.156
b (1/cm-sr-MHzⁿ)	5.006e-06	1.549e-06	1.081e-05	4.788e-06	1.466e-05	1.150e-05
n	3.063	1.056	3.503	1.890	2.883	2.206
Bias
α (dB/cm-MHz)	2.697	0.627	0.800	0.398	0.551	0.365
b (1/cm-sr-MHzⁿ)	1.976e-05	6.208e-06	2.752e-05	1.220e-05	3.368e-05	2.624e-05
n	12.326	4.245	8.929	4.817	6.713	5.147