Table 4. Shear wave speed estimation for the six volunteers.

Shear wave speed ± std* [m/s]	1 Diverging-wave				2 Diverging-waves				3 Diverging-waves
	-x direction	${\overline{R}}^2$	+x direction	${\overline{R}}^2$	-x direction	${\overline{R}}^2$	+x direction	${\overline{R}}^2$	-x direction	${\overline{R}}^2$	+x direction	${\overline{R}}^2$
Volunteer 1	1.65 ± 0.42	0.83	1.11 ± 0.36	0.85	1.71 ± 0.22	0.91	1.15 ± 0.26	0.89	1.92 ± 0.13	0.95	1.13 ± 0.24	0.90
Volunteer 2	1.70 ± 0.37	0.85	1.26 ± 0.51	0.80	1.75 ± 0.17	0.93	1.17 ± 0.35	0.86	1.95 ± 0.14	0.95	1.11 ± 0.39	0.84
Volunteer 3	---	---	---	---	1.34 ± 0.33	0.86	1.23 ± 0.19	0.89	1.15 ± 0.32	0.86	1.09 ± 0.16	0.93
Volunteer 4	---	---	---	---	---	--	0.54 ± 0.19	0.92	0.81 ± 0.24	0.90	0.89 ± 0.27	0.89
Volunteer 5	---	---	---	---	0.95 ± 0.13	0.94	1.39 ± 0.48	0.80	0.72 ± 0.30	0.87	1.18 ± 0.23	0.91
Volunteer 6	---	---	1.86 ± 0.38	0.84	---	---	1.09 ± 0.38	0.84	---	---	---	---

^*std denotes for standard-deviation of the least-squares fit. Values with an adjusted R² inferior to 0.80 were excluded.