Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette continues to be enlarged with hilar congestion and mild edema noted . A left retrocardiac opacity may reflect atelectasis . No pleural effusion or pneumothorax is noted .
    OUTPUT:
    
Cardiomegaly with mild congestion . Left retrocardiac opacity likely reflects atelectasis , though a consolidation is not excluded in the appropriate clinical setting .