Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart is probably normal in size . The mediastinal and hilar contours are unremarkable . There is no definite pleural effusion or pneumothorax . Basilar opacities are slight and probably related to minor atelectasis . There is no evidence for free air .
    OUTPUT:
    
No free air identified . Low lung volumes and patchy bibasilar opacities , most suggestive of minor atelectasis .