Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe enlargement of cardiac silhouette is unchanged . The aorta remains moderately tortuous with atherosclerotic calcifications seen at the aortic knob . The mediastinal contours are unchanged . There is mild pulmonary vascular congestion . No focal consolidation , pleural effusion or pneumothorax is visualized . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion .