Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study of ___ , moderate - to - severe cardiomegaly is stable . Prominent pulmonary vascular congestion is also stable . There is no overt pulmonary edema , pleural effusion or pneumothorax . The mediastinal contours are stable .
    OUTPUT:
    
Moderate - to - severe cardiomegaly and vascular congestion unchanged since ___ . No focal opacity identified .