Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An opacity is again noted overlying the left lower lung on the AP view only and most likely representative of a nipple shadow . Otherwise , the lungs are clear with no evidence of a consolidation , effusion or pneumothorax . Cardiomediastinal silhouette is normal . No acute fractures are identified .
    OUTPUT:
    
No acute cardiopulmonary process .