Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , moderate asymmetric pulmonary edema appears unchanged with improved aeration of the right lung base , bilateral pleural effusions , right greater than left , are unchanged , and associated atelectasis is improved on the right and worse on the left . Lung volumes remain low . The tip of an endotracheal tube is seen 2 .9 cm above the carina . Severe cardiomegaly persists .
    OUTPUT:
    
1 . Mild improvement of moderate asymmetric pulmonary edema with improved aeration of the right lung base . 2 . Persistence of right upper lobe opacity could represent asymmetric edema or pneumonia .