Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Linear opacities are seen within the lung bases bilaterally most compatible with subsegmental atelectasis . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with bibasilar subsegmental atelectasis .