Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are unremarkable . There is no pneumothorax or large pleural effusion . Lung volumes are low with bibasilar atelectasis . There is no focal consolidation concerning for pneumonia .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . No large effusion or pneumonia .