Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is mildly enlarged . The aorta is tortuous . Mediastinal and hilar contours are otherwise unremarkable . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . Mild degenerative changes are seen within the right acromioclavicular joint .
    OUTPUT:
    
No acute cardiopulmonary abnormality .