. 2010 Jul 21;16(6):1597–1600. doi: 10.1089/ten.tec.2010.0150

Table 1.

Measures of Texture in X-Ray Refraction Images of Hydrogels In Vitro

	Mean intensity,	Standard deviation,	Relative smoothness,	Uniformity,	Entropy,
Nonporous	0.521	0.0309	0.0001	0.0358	5.02
Porous (50 μm)	0.516	0.0725^a	0.0054	0.0161^a	6.22^a
Porous (74 μm)	0.515	0.0667^a	0.0045^a	0.0167^a	6.13^a

^{^a}

Indicates statistically significant differences (p < 0.05 analysis of variance with Tukey post test) from nonporous z, p(z), and L denote intensity level, probability of intensity level, and number of intensity levels, respectively.