Table 1 Descriptive statistics of thoracic computed tomographic measurements in 10 healthy New Zealand White rabbits
Variable | Median | Mean | SD | Min | Max |
|---|---|---|---|---|---|
Cardiac angle (°) | 35 | 35 | 2.5 | 30 | 38 |
Long axis of the heart (cm) | 3.3 | 3.4 | 0.4 | 3 | 4 |
Short axis of the heart (cm) | 3 | 3 | 0.2 | 2.7 | 3.2 |
Relative cardiac height (ratio maximal cardiac height/thoracic height) (%) | 74 | 74 | 3.5 | 67 | 81 |
Relative cardiac width (ratio maximal cardiac width/thoracic width) (%) | 88 | 88 | 4.9 | 81 | 95 |
Vertebral heart score | 6.3 | 6.4 | 0.4 | 6 | 7.3 |
Maximal height of caudal vena cava (mm) | 6.4 | 6.3 | 0.6 | 5 | 7.2 |
Maximal height of aorta (mm) | 5.5 | 5.5 | 0.5 | 5 | 6.1 |
Ratio maximal height of caudal vena cava/length of thoracic vertebra at level of bifurcation (%) | 73 | 71 | 5.9 | 57 | 76 |
Ratio maximal height of aorta/length of thoracic vertebra at level of bifurcation (%) | 60 | 62 | 5.2 | 56 | 70 |
Angle of trachea to spine (°) | 5 | 5 | 1.4 | 2 | 7 |
Tracheal height at thoracic inlet (mm) | 5.4 | 5.1 | 1.1 | 2.4 | 6.2 |
Tracheal width at thoracic inlet (mm) | 4.8 | 4.7 | 0.8 | 3.7 | 6.2 |
Ratio tracheal height/thoracic height at thoracic inlet (%) | 26 | 25 | 5.5 | 10 | 30 |
CSA of tracheal lumen at bifurcation (mm2) | 28.3 | 27.8 | 3.4 | 21.9 | 32.2 |
Luminal CSA of right principal bronchus (mm2) | 15.5 | 15.4 | 2.4 | 11.1 | 18.8 |
Luminal CSA of left principal bronchus (mm2) | 12.7 | 12.4 | 1.8 | 9.9 | 15.4 |
Luminal CSA of right caudal lobar bronchus (mm2) | 1.7 | 2.0 | 0.6 | 1.3 | 2.9 |
Luminal CSA of left caudal lobar bronchus (mm2) | 1.7 | 1.7 | 0.4 | 1.1 | 2.4 |
CSA of caudal lobar branch of right pulmonary artery (mm2) | 14.8 | 14.4 | 4.9 | 7.7 | 22.3 |
CSA of caudal lobar branch of left pulmonary artery (mm2) | 11.9 | 11.8 | 2.1 | 9 | 15.3 |
CSA of caudal lobar branch of right pulmonary vein (mm2) | 15.8 | 15.1 | 4.7 | 7.7 | 22.5 |
CSA of caudal lobar branch of left pulmonary vein (mm2) | 10.9 | 11.8 | 3.8 | 7.4 | 18.4 |
Interbronchial angle (°) | 54 | 55 | 4.9 | 50 | 65 |
Lung volume right (cm3) | 30.2 | 31.6 | 8.8 | 23.1 | 54 |
Lung volume left (cm3) | 20.7 | 22.2 | 7.2 | 14.8 | 40.4 |
Density of right caudal lung (HU) | − 549 | − 573 | 92 | − 783 | − 447 |
Density of left caudal lung (HU) | − 583 | − 587 | 98 | − 774 | − 425 |