Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear without focal consolidation . Emphysematous changes are noted , particularly at the apices . The cardiomediastinal silhouette and hilar contours are normal . There is no pleural effusion or pneumothorax . Bilateral nipple shadows should not be mistaken for pulmonary nodules .
    OUTPUT:
    
No acute cardiopulmonary process . Emphysema .