Table 1.

CT volumes and emphysema index values in healthy subjects.

CT Volume (L)				Emphysema Index (%)
Subject#	TLC(1)	RV(1)	RV/TLC(%)	TLC(2)	RV(2)	TLC(3)	RV(3)
S1	6.13	1.76	28.74	25	2	45	1
S2	5.83	1.11	19.02	23	1	43	1
S3	4.33	1.63	37.68	13	1	8	1
S4	5.48	2.90	53.01	23	5	38	3
S5	9.20	2.51	27.33	27	3	41	1
S6	5.44	1.27	23.27	20	1	34	1
S7	3.70	0.86	23.16	14	0	6	1
S8	4.65	1.65	35.54	17	0	12	1
S9	5.46	1.23	22.52	24	0	33	1
S10	4.41	1.14	25.88	25	0	42	0
Mean	5.46	1.61	29.62	21	1	30	1
SD	1.52	0.65	10.06	5	2	15	1
SE	0.48	0.21	3.18	2	0	5	0

⁽¹⁾Calculated with from images reconstructed with B50f (thickness=1 mm);

⁽²⁾Calculated with threshold at −950 HU (images reconstructed with B50f and thickness=1 mm);

⁽³⁾Calculated with threshold at −910 HU (images reconstructed with B30f and thickness=5 mm).