Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are chronic interstitial changes and flattened diaphragms consistent with COPD . There is no cardiac or mediastinal enlargement . There is no pulmonary congestion , pneumothorax , or pleural effusion . No acute parenchymal abnormality .
    OUTPUT:
    
No acute cardiopulmonary process .