Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Aorta is tortuous . Mediastinal and hilar contours otherwise are unremarkable . Pulmonary vascularity is normal . Minimal patchy opacity in the left lung base is nonspecific and could reflect atelectasis or infection . Blunting of the right costophrenic angle posteriorly on the lateral view may reflect a small pleural effusion . There is no pneumothorax . No acute osseous abnormalities are visualized .
    OUTPUT:
    
Patchy nonspecific opacity in left lung base could reflect an area of infection or atelectasis . Probable minimal trace right pleural effusion .