Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . The hila are prominent , which is accounted for by prominent vasculature . There is no pleural effusion or pneumothorax . The lungs are hyperexpanded with flattening of the hemidiaphragms , consistent with COPD . There is no pneumonia or pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process .