Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta is mildly tortuous and diffusely calcified . Hilar contours are unchanged with possible mild enlargement of the pulmonary arteries . There is no pulmonary vascular congestion . Lungs are hyperinflated with flattening of the diaphragms and attenuation of the pulmonary vascular markings towards the apices compatible with underlying emphysema . Linear opacities within the lung apices likely reflect areas of scarring . Streaky opacity within the left lung base may reflect atelectasis . No large pleural effusion is demonstrated . No pneumothorax is seen though the left apex is obscured by the patient 's chin projecting over this region . Multiple remote right - sided rib fractures are again noted .
    OUTPUT:
    
Emphysema . Left basilar streaky opacity , likely atelectasis , though infection is not completely excluded .