Thoracic soft tissues

Configuration, position:

— No masses in the anterior, central, or posterior compartment

Hilar region:

— No masses or lymphadenopathy Main bronchi:

— Position (centered slightly left of midline)

— Configuration

— Myocardium (width—see below) Intrathoracic vessels (ascending aorta, aortic arch, descending aorta, vena cava—see below):

Supra-aortic vessels (subclavian artery, brachio-cephalic trunk, left common carotid artery):

Shape (no contour abnormalities, costophrenic angle is sharp and clear)

Position (approximately the level of the 10th-11th posterior rib)

Width (no circumscribed widening, no defect)

Position

Structure

Contours and symmetry No bony expansion or destruction Thoracic spine:

— Shape of thoracic vertebrae Configuration

Width

Symmetry

Density

Important Data

1

CT density of lung parenchyma:

• -403 ± 25 HU

2

Diameter of aorta:

• < 4 cm

a Ascending aorta:

• At level of pulmonary trunk bifurcation: 3.2 cm ± 0.5 cm

• At level of aortic root: 3.7 cm ± 0.3 cm

b Descending aorta:

• 2.5 cm ± 0.4 cm

• Aortic arch: 1.5 cm ± 1.2 cm

Ratio of ascending to descending aortic diameters = 1.5:1

3

Diameter of superior vena cava:

• At level of aortic arch: 1.4 cm ± 0.4 cm

• At level of pulmonary trunk bifurcation: 2 cm ± 0.4 cm

4

Diameter of pulmonary arteries:

• Pulmonary trunk: 2.4 cm ± 0.2 cm

• Proximal right pulmonary artery: 1.9 cm ± 0.3 cm

• Distal right pulmonary artery: 1.5 cm ± 0.3 cm

• Left pulmonary artery: 2.1 cm ± 0.4 cm

5

Width of main bronchi:

• Right ca. 15 mm

• Left ca. 13 cm

6

Mediastinum:

• Transverse diameter of thymus: 1-2 cm

Heart

Dimensions of cardiac chambers

7

Right atrium:

• Maximum transverse diameter: 4.4 cm

— At level of aortic root: 1.9 cm ± 0.8 cm

— At level of mitral valve: 3.2 cm ± 1.2 cm

— At center of ventricles: 2.8 cm ± 0.4 cm

8

Left atrium:

a Maximum anteroposterior diameter: 4-5 cm

• At level of aortic root: 2.4 cm ± 4.5 cm

• At level of mitral valve: 2.9 cm ± 4.9 cm

b Maximum transverse diameter: 9 cm

• At level of aortic root: 5.5 cm ± 8.4 cm

• At level of mitral valve: 4.9 cm ± 9.1 cm

9

Angle between midsagittal plane and septum = 38°

10 Thickness of ventricular septum:

• Approximately 5-10 mm

11 Thickness of pericardium:

12 Thickness of myocardium:

Lung window
Contrast bolus scan at level of pulmonary trunk bifurcation
Contrast bolus scan through center of ventricles

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