Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top - normal in size . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Patchy opacities in the lung bases likely reflect areas of atelectasis . No pleural effusion , focal consolidation or pneumothorax is present . No acute osseous abnormalities detected .
    OUTPUT:
    
Patchy bibasilar airspace opacities , likely atelectasis . Infection can not be excluded in the correct clinical setting .