Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal cardiomediastinal and hilar contours . Interstitial opacities at the costophrenic angles bilaterally , new since the remote prior study from ___ . No pneumothorax or pleural effusion . Degenerative changes throughout the thoracic spine . There is no free intraperitoneal air .
    OUTPUT:
    
New , interstitial , bibasilar opacities since ___ could represent a chronic interstitial process ; however , acute infection is also possible .