Table 1.

Non-linear regression of the BaSO₄ relative peak intensity with the number of loading cycles using a power-law, y = A·x^b. The region of analysis included either the micro-CT image of the entire specimen cross-section or a subregion that excluded the free surfaces of beams and endosteal vasculature, as shown in Figure 2. Specimens regarded as outliers included two specimens that were observed to be over-stained and four specimens that exhibited macroscopic cracks propagating from the imaged notch (Fig. 8).

Specimens	Region of Analysis	A	b	p	r2
all (n = 24)	entire cross-section	0.165	0.041	< 0.05	0.23
all (n = 24)	subregion	0.063	0.121	< 0.0001	0.56
outliers removed (n =18)	entire cross-section	0.162	0.045	< 0.005	0.41
outliers removed (n =18)	subregion	0.062	0.124	< 0.0001	0.61