Table 3.

Model parameters and values for fitting of experimental data from gelatin and rubber phantoms. MAE is the median absolute error between the acquired data and the curve fit from the model.

Model parameter	Gelatin 1	Gelatin 2	Rubber
Kelvin–Voigt MAE	0.0207	0.0257	0.0472
μKV, kPa	8.06	17.52	52.95
ηKV, Pa s	0.27	0.75	5.92
Maxwell MAE	0.0192	0.0210	0.0368
μM, kPa	7.58	15.74	45.52
ηM, Pa s	30.79	23.59	14.71
Generalized Maxwell MAE	0.0207	0.0256	0.0208
μGM,0, kPa	8.06	17.47	18.65
μGM,1, kPa	99.97	100.00	18.77
ηGM,1, Pa s	0.14	0.37	3.73
μGM,2, kPa	99.97	100.00	18.74
ηGM,2, Pa s	0.14	0.37	3.72
Zener MAE	0.0207	0.0130	0.0208
μZ,1, kPa	8.05	13.27	18.64
μZ,2, kPa	49.98	4.45	37.50
ηZ, Pa s	0.27	1.83	7.45
Kelvin–Voigt	0.0197	0.0217	0.0366
Fractional derivative MAE
μKVFD, kPa	7.51	14.14	30.72
ηKVFD, Pa s	7.38	100.00	100.00
α	0.58	0.43	0.66