This was a consolidation due to a pneumonia caused by Sterptococcus pneumoniae. The double-density sign, also known as the double right heart border, is seen on frontal chest radiographs in the presence of left atrial enlargement, and occurs when the right side of the left atrium pushes behind the right cardiac shadow, indenting the adjacent lung and forming its own distinct silhouette 1-3. This is distinct from the sail sign appearance of the normal thymus.. See also. It extends from a point in the second left intercostal space, about 2.5 mm. See more ideas about Heart border, Borders for paper and Borders and frames. thymic notch sign; thymic sail sign; thymic wave sign Symptoms of Coronary Artery Disease. The size and shape of the cardiac silhouette provide useful clues for underlying disease. right heart border: right middle lobe or medial right lower lobe; right hemidiaphragm: right lower lobe; aortic knuckle: left upper lobe; left heart border: lingular segments of the left upper lobe; left hemidiaphragm or descending aorta: left lower lobe; Sites of silhouette sign on the lateral chest radiograph include 3: The most common symptom of coronary artery disease is angina, or chest pain. The left border of heart (or left margin, or obtuse margin) is shorter than the right border, full, and rounded: it is formed mainly by the left ventricle, but to a slight extent, above, by the left atrium.. Even without looking at the lateral film, we know, that the pathology must be located anteriorly in the left lung. The spinnaker sign (also known as the angel wing sign) is a sign of pneumomediastinum seen on neonatal chest radiographs. The PA-film shows a silhouette sign of the left heart border. It refers to the thymus being outlined by air with each lobe displaced laterally and appearing like spinnaker sails. Oct 24, 2018 - Explore kloveshearts's board "heart borders", followed by 898 people on Pinterest. Cardiac silhouette refers to the outline of the heart as seen on frontal and lateral chest radiographs and forms part of the cardiomediastinal contour. It can be mistaken for indigestion or heartburn. Angina can be described as a discomfort, heaviness, pressure, aching, burning, fullness, squeezing, or painful feeling in your chest. from the sternal margin, obliquely downward, with a convexity to the left, to the apex of the heart. This sign is present when an intra-thoracic lesion touches the border of the heart, aorta, or diaphragm and that border is obliterated on the X-ray [Figure 21a – c].