Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiac silhouette and minimal unfolding of the thoracic aorta . The mediastinal and hilar contours are within normal limits . The lungs are clear without pneumothorax , vascular congestion and pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .