TABLE 5

Intraobserver Measurements for Quantification on SPECT/CT Ventilation Studies

Site	Mean	Mean absolute difference	Intraclass correlation coefficient	SEM for ICC
Total right lung	56.0 (46.3−74.0)	0.4 (0−1.6)	0.997 (0.994–0.999)	0.798
Total left lung	44.0 (26.1−53.7)	0.4 (0−1.7)	0.997 (0.994–0.999)	0.798
Right upper lobe	20.7 (7.7−33.8)	1.3 (0−3.5)	0.956 (0.910–0.979)	2.312
Right middle lobe	9.3 (0.5−14.6)	0.9 (0−3.4)	0.943 (0.882–0.973)	1.661
Right lower lobe	26.0 (13.9−42.2)	0.8 (0−2.3)	0.989 (0.977–0.995)	1.443
Left upper lobe	22.3 (7.3−33.1)	0.3 (0−1.3)	0.989 (0.977–0.995)	1.174
Left lower lobe	22.0 (10.0–33.3)	0.6 (0−3.3)	0.989 (0.976–0.995)	1.205

Data in parentheses are range for mean and mean absolute difference and are 95% confidence interval for ICC.