Thoracic aortic aneurysm plain chest radiograph

Thoracic aortic aneurysm on chest radiograph. The plain frontal chest radiograph demonstrates marked aneurysmal dilatation of the entire arch of the aorta (arrows). Patency of the aorta or dissection within the lumen cannot be inferred from the plain film and contrast or echocardiographic studies are required to make this distinction.

Posteroanterior view of a normal chest radiograph.