Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild opacification at the medial right apex corresponds to pleural - parenchymal scarring , better assessed on prior chest CT . Dilatation of the ascending aorta , better seen on prior chest CT from ___ , corresponds with known fusiform aneurysm . No focal consolidation . No pleural effusion . No pneumothorax . Mediastinal and hilar contours are stable . Heart size is normal .
    OUTPUT:
    
No evidence of pneumonia .