Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart size is normal and cardiomediastinal contours are stable . The lungs are clear without focal consolidation , pleural effusion , or pneumothorax . Lung hyperinflation is severe with flattening of the diaphragms and right lower lobe lucency consistent with a large bulla , similar to prior .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Lung hyperinflation , suggestive of COPD , with unchanged large right lower lobe bulla .