Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta remains mildly tortuous with atherosclerotic calcifications noted at the knob . Mediastinal and hilar contours appear unchanged . Pulmonary vasculature is normal . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes noted the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .