Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta is diffusely calcified . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Small left pleural effusion is new with left lower lobe opacity possibly reflective of compressive atelectasis or pneumonia . A small right pleural effusion is also likely present . No pneumothorax is present . An azygos lobe is incidentally detected . No acute osseous abnormalities identified .
    OUTPUT:
    
Small bilateral pleural effusions with left lower lobe opacity , possibly compressive atelectasis but pneumonia can not be excluded .