Table 1.

Interobserver agreement of the detection of ground glass nodules in 34 nodules, 216 subjects

Reconstruction technique	Window level/width (HU)	Slice thickness (mm)	Cohen kappa	Confidence interval
MIP	−500/1500	7	0.89	0.78–0.95
MPR	−800/800	5	0.95	0.87–1.0
Thin slices	−800/800	1	0.91	0.81–0.98

Data are given for 2 observers who evaluated 216 CT scans from 216 subjects.