Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate mildly enlarged cardiac silhouette . The mediastinal silhouette and hilar contours are normal . Moderate pulmonary edema is present . Small bilateral pleural effusions . Retrocardiac opacity could represent a combination of effusion and atelectasis ; although , pneumonia is possible . No pneumothorax . No displaced rib fracture identified .
    OUTPUT:
    
Congestive heart failure and possible pneumonia .