Table 2. Inter-Observer Kappa Coefficients Between Observers For the First and Second Readings ^a.

Variables	First Reading, Obs1-Obs2		Second Reading, Obs1-Obs2
	Kappa	SE	Kappa	SE
3D Accuitomo 170, 4 × 4 cm	0.973	0.027	0.973	0.027
3D Accuitomo 170, 6 × 6 cm	0.888	0.054	0.946	0.038
NewTom 3G, 6˝	0.859	0.061	0.945	0.038
NewTom 3G, 9˝	0.757	0.079	0.811	0.074

^a Abbreviations: SE: Standard Error, Obs1: Observer 1, Obs2: Observer 2.