Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no free beneath the diaphragm , pneumomediastinum or pneumothorax . Atelectasis is noted at the lung bases , without a focal consolidation worrisome for pneumonia . Heart size is normal . No pleural effusion . Old rib fractures are noted on the right .
    OUTPUT:
    
No free air .