AP Projection.1, Trachea. 2, Clavicle. 3, 4th posterior rib. 4,
Right main bronchus. 5, Right breast shadow. 6, Gastric air bubble.
7, Left hemidiaphragm. 8, Left ventricle. 9, Descending aorta. 10,
Left pulmonary artery. 11 Left upper lobe. 12, Left atrium. 13,
Right ventricle. 14, Right pulmonary artery and right pulmonary
veins. 15, Vertebral body (Thoracic spine). 16, Posterior
costophrenic angle. Lateral projection.
