Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is re - demonstrated . The aorta is tortuous . Mediastinal and hilar contours are otherwise unchanged . Pulmonary vasculature is normal . Previously noted chronic focal opacity along the lateral aspect of the left lung base adjacent to a remote left lateral rib fracture is less conspicuous on the current exam . Lungs are otherwise clear . No pleural effusion or pneumothorax is seen . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .