Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains tortuous but unchanged . The mediastinal and hilar contours are unremarkable and the lungs are clear . The pulmonary vascularity is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No pneumothorax . No acute cardiopulmonary process .