Frontal radiograph demonstrates a hugely dilated aorta consistent with an aneurysm of the aorta. [Courtesy of Dr. N. Jaffer]
Note aortic and mitral valve replacements on this lateral radiograph.
This patient has suffered complete collapse of the right upper lobe. Note the opaque, atelectatic right upper lobe projecting over the superior right hemithorax. This image is a good example of the “S-sign” of Golden: The displaced minor fissure resembles...
This patient has suffered complete collapse of the right middle lobe. Note the opaque, atelectatic right middle lobe projecting over the mid right hemithorax. The collapsed right middle lobe also demonstrates the “silhouette” sign; in this case, part of the adjacent...
This patient suffered complete collapse of the right lower lobe. The major fissure is clearly displaced inferiorly, the atelectatic lobe projects as a flat opacity, and the right hemidiaphragm is “silhouetted” (see below). Indirect signs of atelectasis...
This patient has collapse of the entire left upper lobe, including the lingula. On the PA film, this projects as a hazy opacity over much of the upper left hemithorax. The lateral view shows the classic”pancake” opacity filling the retrosternal air space....
This patient has postoperative atelectasis of the entire left lower lobe. The left hemidiaphragm is “silhouetted” and the left hilum displaced downward. On the lateral view, there is an obvious retrocardiac density (the atelectatic lobe) and downward...
This young patient has left lower lobe pneumonia. The left hemidiaphragm is “silhouetted” by consolidation in the left lower lobe (note that one cannot see the entire left hemidiaphragm through the cardiac shadow). In a normal chest x-ray, the diaphragm and...
In a normal chest x-ray, the diaphragm and mediastinal structures are visible because of the difference in radiodensity between lung and these structures (i.e. there is an “interface” between the tissues). The “silhouette” sign refers to loss...
Image A: The left hemidiaphragm is invisible due to a consolidation in the left lower lobe. Image B: The right hemidiaphragm is poorly seen due to consolidation in the right lower lobe. An interface is not visible when two areas of similar radiodensity touch....
