Table 3.

Observer agreement (κ statistics) over the evaluation of features of thyroid nodules in multiplanar reformation mode (MPR) and by thin-slice rendering with surface algorithm (Surf).

		κ	p
Echogenicity	MPR	0.70	< 0.0001
Echogenicity	Surf	0.71	< 0.0001
Borders	MPR	0.82	< 0.0001
Borders	Surf	0.60	< 0.0001
CAL	MPR	0.57	< 0.0001
CAL	Surf	0.44	= 0.0002
Shape in c-plane	Surf	0.57	< 0.0001

calcification/microcalcification-like echogenic foci (CAL); c-plane - plane parallel to ultrasound probe