Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is chronic and mild pulmonary edema is worse today than on ___ , though less severe than on ___ or ___ . Pleural effusions would not be surprising , but are small if any . Obscuration of the left hemidiaphragm could be due to atelectasis and confluent edema or , less likely , pneumonia .
    OUTPUT:
    
Recurrent mild pulmonary edema due to chronic congestive heart failure . Left lower lobe atelectasis and confluent edema , less likely pneumonia .