Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs again demonstrate mild cardiomegaly and chronic interstitial changes without pulmonary vascular congestion or pleural effusion . Hyperexpansion is consistent with chronic COPD . There is no focal consolidation or pneumothorax . The cardiac , hilar , mediastinal contours are within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .