Table 6.

Kappa statistic for interobserver agreement among three readers of five semantic features.

Semantic image feature	Min	Average	Max
Presence of internal arteries—assessed on arterial imaging	0.45	0.59	0.73
Presence of internal arteries—assessed on venous imaging	0.02	0.20	0.36
Presence of hypodense halo	0.16	0.29	0.44
Tumor liver difference	$-0.04$	0.03	0.08
Tumor margins: smooth versus nodular	0.05	0.18	0.37