Skip to main content

Table 1 Lung volumes and masses quantified by whole-lung CT analysis

From: Extrapolation in the analysis of lung aeration by computed tomography: a validation study

 

Normal lung CT scans

Lung CT scans with opacification

 

sheep

( n = 66)

pigs

( n = 14)

sheep

( n = 102)

pigs

( n = 41)

Vtotal (ml)

3,748 (2,245 to 5,638)

2,308 (1,114 to 3,061)

2,827 (1,338 to 4,252)

1,868 (698 to 3,184)

Vnon (%)

0.5 (0.0 to 0.8)

0.1 (0.0 to 1.2)

3.9 (0.3 to 32.2)

3.6 (0.0 to 43.5)

Vpoor (%)

3.4 (1.4 to 10.7)

2.3 (0.8 to 10.7)

10.7 (3.5 to 46.7)

27.8 (4.3 to 59.1)

Vnormal (%)

93.7 (88.4 to 97.5)

94.7 (88.9 to 98.2)

82.4 (33.5 to 94.1)

68.5 (22.5 to 95.5)

Vhyper (%)

1.4 (0.1 to 5.6)

1.8 (0.3 to 4.9)

0.7 (0.0 to 8.0)

0.1 (0.0 to 2.0)

Mtotal (g)

891 (694 to 1,116)

505 (397 to 703)

888 (660 to 1,246)

795 (346 to 1,564)

Mnon (%)

1.9 (0.2 to 2.8)

0.3 (0.0 to 5.3)

10.6 (1.3 to 56.0)

10.1 (0.0 to 58.5)

Mpoor (%)

8.7 (4.7 to 18.8)

5.8 (2.5 to 17.8)

22.2 (9.2 to 60.2)

35.3 (7.4 to 67.1)

Mnormal (%)

88.3 (78.9 to 93.2)

90.3 (77.5 to 96.9)

61.3 (18.5 to 87.0)

48.1 (10.2 to 92.5)

Mhyper (%)

0.5 (0.0 to 2.2)

0.5 (0.1 to 2.4)

0.1 (0.0 to 3.2)

0.0 (0.0 to 0.6)

Vgas (ml)

2,855 (1,479 to 4,556)

1,761 (717 to 2,523)

1,904 (482 to 3,133)

1,085 (196 to 2,169)

Vgas (%)

76.4 (65.9 to 80.8)

76.7 (64.4 to 82.4)

66.9 (32.8 to 78.0)

55.4 (24.8 to 73.2)

  1. Data are given as median (range).
  2. CT, computed tomography; Vtotal/Mtotal, total lung volume or mass. The following volumes and masses of differently aerated lung compartments were calculated as percentage of Vtotal or Mtotal, respectively: Vnon/Mnon , nonaerated volume or mass; Vpoor/Mpoor, poorly aerated volume or mass; Vnomal/Mnormal, normally aerated volume or mass; Vhyper/Mhyper, hyperaerated volume or mass; Vgas, pulmonary gas volume; ml, milliliters; g, grams.