Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lung base atelectasis is again noted . A retrocardiac opacity is noted , increased since the ___ exam which could be consistent with atelectasis but would be worrisome for infection in the correct clinical setting . There is no pleural effusion or pneumothorax . There is no overt pulmonary edema . There is no free air . Vascular coils are noted in the mid abdomen .
    OUTPUT:
    
Bibasilar opacities likely reflective of atelectasis although pneumonia is not excluded in the correct clinical setting .