Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta is mildly tortuous but unchanged . Mediastinal and hilar contours are otherwise within normal limits . Lungs are clear and the pulmonary vasculature is normal . No pleural effusion or pneumothorax is present . No acute osseous abnormalities seen .
    OUTPUT:
    
No acute cardiopulmonary process .