Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Cardiac silhouette is normal . No pleural effusion or pneumothorax . There is no free air . Previously , the left hilar region was thought to be slightly rounded in its contour however , recent chest CT demonstrated this was vascular in origin and not due to lymphadenopathy . There was a borderline lymphnode seen on that CT for which recommendation was for repeat limited CT with contrast .
    OUTPUT:
    
No acute cardiopulmonary process .