Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged , with the heart size within normal limits . Metallic stent is again noted in the region of the SVC and right brachiocephalic vein , unchanged . Lungs are clear . Pulmonary vascularity is normal . There is mild hyperinflation of the lungs with flattening of the diaphragms . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .