Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is tortuous with atherosclerotic calcifications noted at the aortic knob . Hilar contours are unchanged and remain prominent . Lungs appear hyperinflated with probable mild emphysematous changes in the upper lobes . Patchy opacity within the right lung base is nonspecific and may reflect an area of atelectasis but infection can not be excluded . Minimal streaky left basilar opacity is also noted . No focal consolidation , pleural effusion or pneumothorax is demonstrated . Pulmonary vasculature is not engorged . Calcified pleural and parenchymal scarring is seen within the lung apices . No acute osseous abnormality is detected .
    OUTPUT:
    
Nonspecific patchy bibasilar airspace opacities , more pronounced on the right , which could reflect areas of atelectasis but infection is not excluded .