Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear aside from minimal bibasilar atelectasis . The hilar and mediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . More than expected elevation of the right hemidiaphragm is noted . There is no free air under the diaphragm .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . No evidence of free air beneath the diaphragms . 3 . Elevation of the right hemidiaphragm may be a chronic finding . 4 . Minimal bilateral lower lobe atelectasis .