Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is pulmonary edema with slight improvement compared to the prior study . Persistent opacification of the left lower lobe could be due to edema , but in the appropriate clinical context pneumonia should be considered . Mediastinal widening is consistent with lymphadenopathy seen on recent CT study . Heart is mildly enlarged . No pleural effusions and no pneumothorax .
    OUTPUT:
    
1 . Pulmonary edema has improved . 2 . Persistent right lower lobe opacification is likely secondary to edema and atelectasis , pneumonia can not be excluded .