Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate pulmonary edema is again noted , slightly improved since ___ . Cardiomegaly is unchanged from ___ . The mediastinal and hilar contours are unremarkable . No pleural effusion or pneumothorax is present . Mild retrocardiac atelectasis can not be completely excluded .
    OUTPUT:
    
Stable cardiomegaly with improved moderate pulmonary edema compared to ___ . Possible mild retrocardiac atelectasis .