Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is top normal . Mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures with no overt pulmonary edema demonstrated . Streaky opacities in the lung bases likely reflect areas of atelectasis . No pleural effusion or pneumothorax is identified on this supine exam . No acute osseous abnormality is visualized .
    OUTPUT:
    
Low lung volumes with streaky bibasilar opacities , likely atelectasis .