Fig. 12 
Aortic aneurysm. Frontal chest radiograph (
 A 
) in a 62-year-old male with cough and breathlessness demonstrating opacification of left hemithorax. Contrast axial (
 B 
) and coronal (
 C 
) reformatted images show intensely enhancing large aortic aneurysm with nonenhancing thrombus within. Aneurysm is noted to compress the left main bronchus resulting in collapse of left lung. Note the moderate left pleural effusion. Sagittal reformatted image (
 D 
) in bone window showing erosion of vertebral bodies by long-standing aneurysm.
