Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear stable . Trace bilateral pleural effusions are suspected . There is minor left posterior basilar streaky atelectasis . However , otherwise , the lungs appear clear . There is no evidence for pneumonia or congestive heart failure .
    OUTPUT:
    
Minor atelectasis at the left lung base . Trace suspected pleural effusions . No evidence of pneumonia .