Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . Healed posterior left rib fractures are unchanged . No acute fracture is identified .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically , no evidence of pneumonia .