Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Linear opacities within both lung bases are compatible with subsegmental atelectasis . There appear to be trace bilateral pleural effusions . No focal consolidation or pneumothorax is seen . No acute osseous abnormality is visualized .
    OUTPUT:
    
Low lung volumes with bibasilar subsegmental atelectasis and trace bilateral pleural effusions .