Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are interstitial abnormalities at the lung bases bilaterally , which appear to have progressed compared to the most recent radiograph performed in ___ . This does not have the appearance of either pulmonary edema or pneumonia . Pleural irregularity at the right apex is new from the prior radiograph , and is probably due to scarring . No pleural effusions or pneumothorax . Remote bilateral 6th rib fractures are again noted . No acute osseous abnormalities . No subdiaphragmatic free air .
    OUTPUT:
    
1 . Bibasilar interstitial abnormalities appear to have progressed since ___ . 2 . No evidence of pneumoperitoneum .