Table 2.

Test-retest reproducibility of (a) VOI size, (b) count densities and (c) uptake ratios

	Mean	Difference†	CV	ICC	95% CI
(a)
Early
Liver	13.1 ± 1.3	2.52 ± 1.6	13.7	−0.14	−0.40–0.14
Lung	13.0 ± 1.3	2.32 ± 1.5	12.5	−0.09	−0.36–0.19
Mediastinum	12.7 ± 1.5	2.32 ± 1.7	18.4	0.00	−0.27–0.28
Heart	522.0 ± 237.5	77.2 ± 76.0	10.5	0.90	0.84–0.94
Lumen	10.4 ± 6.9	4.38 ± 4.7	29.8	0.65	0.46–0.78
Delayed
Liver	13.2 ± 1.3	2.27 ± 1.7	12.2	−0.13	−0.39–0.15
Lung	13.3 ± 1.3	2.58 ± 1.8	13.7	−0.17	−0.43–0.11
Mediastinum	12.7 ± 1.5	2.39 ± 1.8	13.3	0.03	−0.25–0.29
Heart	519.0 ± 232.2	83.3 ± 107.1	11.5	0.84	0.75–0.91
Lumen	10.4 ± 6.9	4.03 ± 4.4	27.6	0.70	0.52–0.81
(b)
Early
Liver	28.0 ± 7.7	4.14 ± 3.6	10.4	0.79	0.63–0.87
Lung	12.8 ± 3.6	0.94 ± 0.9	5.2	0.93	0.88–0.96
Mediastinum	4.8 ± 1.3	1.25 ± 1.0	18.4	0.47	0.20–0.66
Heart	9.3 ± 3.6	0.20 ± 0.2	1.5	0.99	0.99–1.00
Lumen	5.0 ± 1.7	0.33 ± 0.3	4.7	0.96	0.93–0.98
Delayed
Liver	26.6 ± 9.0	3.03 ± 2.5	8.1	0.91	0.81–0.95
Lung	10.5 ± 3.0	0.69 ± 0.6	4.6	0.95	0.91–0.97
Mediastinum	4.1 ± 1.0	0.50 ± 0.4	8.7	0.84	0.72–0.90
Heart	8.2 ± 4.4	0.23 ± 0.2	1.9	0.99	0.99–1.0
Lumen	4.4 ± 2.2	0.34 ± 0.3	5.4	0.97	0.95–0.99
(c)
Early
HM ratio	1.92 ± 0.4	0.48 ± 0.3	17.8	0.37	0.09–0.59
MM ratio	0.86 ± 0.3	0.25 ± 0.2	20.1	0.57	0.23–0.77
ML ratio	0.82 ± 0.2	0.13 ± 0.2	11.2	0.60	0.37–0.75
Delayed
HM ratio	1.98 ± 0.7	0.26 ± 0.2	9.4	0.90	0.82–0.95
MM ratio	0.89 ± 0.4	0.15 ± 0.1	12.0	0.89	0.81–0.93
ML ratio	0.81 ± 0.2	0.14 ± 0.1	12.5	0.61	0.40–0.76

^†One sample T test of the absolute differences between the two measurements, all differences were P < .001.