Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains moderately enlarged . The aorta remains tortuous . Mediastinal and hilar contours are similar with prominence of the right hilum again noted . Pulmonary vasculature is not engorged . Minimal patchy lower lobe opacities , more pronounced on the left , likely reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Bilateral lower lobe patchy opacities , likely atelectasis , though infection in the left lower lobe is not completely excluded .