Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without pleural effusion , focal consolidation or pneumothorax . Hilar and mediastinal silhouettes are unchanged . Aortic arch calcifications are redemonstrated . The heart is normal in size . Patient 's known emphysematous changes are redemonstrated . There is no pulmonary edema .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .