Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette . There is mild unfolding of the thoracic aorta . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion . Left hemidiaphragmatic elevation is stable .
    OUTPUT:
    
No acute cardiopulmonary process such as pneumonia .