Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior radiograph on ___ , lung volumes are lower . Bibasilar interstitial opacities are new , and may reflect underinflation . There is otherwise no focal consolidation to suggest pneumonia . No pleural effusions or pneumothorax . Heart size is normal . No acute osseous abnormalities identified . Port - A - Cath terminates at the cavoatrial junction .
    OUTPUT:
    
New bibasilar interstitial opacities are most likely due to under - inflation . No focal consolidation to suggest pneumonia .