Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The lung volumes are low . There is no pleural effusion or pneumothorax . The lungs appear clear . Crowding of basilar lung markings on the lateral view is probably due to low lung volumes . The bony structures appear within normal limits .
    OUTPUT:
    
No definite evidence of acute cardiopulmonary disease .