Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Minimal atherosclerotic calcifications are noted within the aortic knob . The pulmonary vasculature is not engorged . Lungs are hyperinflated with emphysematous changes noted in the upper lobes . Mild blunting of the costophrenic angles posteriorly may reflect chronic pleural thickening . Patchy opacities in lung bases likely reflect areas of atelectasis . No pneumothorax is seen . No acute osseous abnormality is seen .
    OUTPUT:
    
Emphysema with patchy opacities in the lung bases , likely atelectasis .