Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and shows ill defined interstitial opacities in both lung bases . The cardiomediastinal silhouette , hilar contours and pleural surfaces are normal . No pleural effusion or pneumothorax is present . No acutely displaced rib fractures noted .
    OUTPUT:
    
1 . No definite rib fractures are noted although if this continues to be a clinical concern then a dedicated rib series with markers at the site of pain may be obtained . 2 . Ill defined , mild interstitial opacities in both lung bases could represent chronic interstitial change , or possibly aspiration or infection . Clinical correlation is recommended and a non-urgent chest CT can be obtained for further evaluation .