Table 1.

Average values of the elastic modulus (E) are shown for each region analyzed; the values were obtained from PF-QNM and AFC data with the respective R² statistics.

	Elastic modulus (E) (GPa)		R 2
	PF-QNM	AFC	PF-QNM	AFC
Region 1	3.42 ± 0.01	2.25 ± 0.26	0.98	0.91
Region 2	1.085 ± 0.002	0.89 ± 0.08	0.99	0.99
Region 3	1.461 ± 0.002	0.38 ± 0.02	0.95	0.90
Region 4	1.099 ± 0.001	0.515 ± 0.009	0.99	0.95
Region 5	1.425 ± 0.002	0.97 ± 0.05	0.99	0.99
Region 6	1.817 ± 0.002	1.04 ± 0.06	0.98	0.91
Region 7	2.73 ± 0.01	0.212 ± 0.003	0.97	0.96