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 unremarkable . Pulmonary vasculature is unremarkable . Linear opacities in the lung bases are compatible with areas of atelectasis . No pleural effusion or pneumothorax is seen . Fiducial markers are seen within the right upper quadrant of the abdomen .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .