Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is mildly tortuous with mild atherosclerotic calcifications noted at the aortic knob . Pulmonary vasculature is normal . Hilar contours are unremarkable . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . Mild degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .