Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low causing crowding of the central bronchovascular structures . The heart size is normal given AP technique . There is no focal consolidation , pleural effusion or pneumothorax . MILD WIDENING OF THE MEDIASTINUM TO THE RIGHT OF MIDLINE IS PROBABLY DUE TO FAT DEPOSITION .
    OUTPUT:
    
Low lung volumes .