Table 3.

Best fit parameters for each phantom, restricting $C_1,{\delta }_2=0$ Pa; the error, computed as per Eq. 20, can be seen in the first column, in brackets

Phantom	$C_2$ (Pa)	${\delta }_1$ (Pa)	$\alpha$
p1 (3.95%)	118.94	1923.03	0.03
p2 (6.54%)	233.16	1900.25	0.03
p3 (1.78%)	169.10	3220.10	0.03
p4 (2.32%)	117.86	3143.31	0.02
p5 (1.28%)	176.42	2854.77	0.02
p6 (8.74%)	216.15	1973.74	0.03
	Linear	Linear	Nonlin
Mean	171.94	2502.53	0.03
SD	43.71	581.34	0.005