Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains mildly enlarged . The mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . Lungs remain hyperinflated suggestive of COPD . There appears to be mild bronchial wall thickening within the lower lobes , more pronounced than on the previous exam , which could reflect bronchial inflammation or infection . No focal consolidation , pleural effusion or pneumothorax is present . There is diffuse calcification of the aorta . Degenerative changes are noted in the thoracic spine . No acute osseous abnormality is noted .
    OUTPUT:
    
Mild bronchial wall thickening suggestive of inflammation or infection . No acute osseous abnormality is seen .