Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Lungs are hyperexpanded and there is mild flattening of the diaphragms , consistent with known diagnosis of COPD . There is no focal consolidation , pleural effusion or pneumothorax . Tiny dense nodule in the right lung base likely represents a calcified granuloma versus a vessel on end .
    OUTPUT:
    
No acute cardiopulmonary process .