Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a tortuous descending aorta . Otherwise , the cardiomediastinal and hilar contours are unremarkable . The lungs are somewhat hyperexpanded , but clear . No pleural effusion or pneumothorax evident . No osseous abnormality identified .
    OUTPUT:
    
No acute cardiopulmonary process .