Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Mediastinal and hilar contours are normal . Pulmonary vasculature is not engorged . Patchy opacities are demonstrated in both lung bases along with a small right pleural effusion . No pneumothorax is detected . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy bibasilar airspace opacities may reflect atelectasis but infection or aspiration is not excluded . Small right pleural effusions .