Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta remains tortuous . The mediastinal and hilar contours otherwise are unremarkable . Lungs are clear and the pulmonary vascularity is normal . Biapical scarring is unchanged . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .