Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal and enteric tubes remain in unchanged positions . Heart size remains moderately enlarged . The mediastinal contour is similar . Mild pulmonary edema is not substantially changed in the interval . Bibasilar opacities persist and may reflect areas of atelectasis though infection is not excluded . A small left pleural effusion may be present . There is no pneumothorax .
    OUTPUT:
    
No substantial interval change from the prior study . Mild pulmonary edema and bibasilar atelectasis , though infection is not excluded . Possible small left pleural effusion .