Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is mildly enlarged but unchanged . Mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures without overt pulmonary edema . Minimal patchy opacities in the lung bases likely reflect atelectasis . There is no focal consolidation . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .