Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is mildly unfolded with some aortic knob calcifications . The pulmonary vascularity is normal , and the hilar contours are unremarkable . The lungs are clear . No pleural effusion or pneumothorax . No acute osseous abnormality is seen .
    OUTPUT:
    
No acute cardiopulmonary process .