Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The cardiomediastinal silhouette is within normal limits . Right humeral head orthopedic hardware is noted . Widening of the left acromioclavicular joint is also noted .
    OUTPUT:
    
No acute cardiopulmonary process . Widening of the left AC joint which could be chronic , to be correlated clinically .