Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate mildly hyperexpanded , clear lungs . The cardiomediastinal and hilar contours are unchanged . The heart remains mildly enlarged . The hila are persistently prominent , likely due to hyperinflation . There is no pneumothorax , pleural effusion , or consolidation .
    OUTPUT:
    
No acute cardiopulmonary process .