Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low , causing exaggeration of the heart size and accentuation of the pulmonary vasculature . Mild pulmonary edema has slightly worsened compared to the prior study from ___ . Subsegmental right upper lung atelectasis is increased . Dense retrocardiac atelectasis has also slightly increased , likely atelectasis . Small bilateral pleural effusions are not excluded . There is no pneumothorax . Mild cardiomegaly is not significantly changed . Enlargement of the azygos contour is unchanged , suggestive of venous distention .
    OUTPUT:
    
1 . Slight interval increase in mild pulmonary edema . 2 . Slightly increased dense retrocardiac atelectasis , likely atelectasis . 3 . Mild cardiomegaly , not significantly changed .