Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Biapical emphysema and adjacent parenchymal scarring unchanged . Bronchial wall thickening is again demonstrated suggestive of chronic bronchitis . No pulmonary edema or acute consolidation . Heart size is normal . No pleural effusions or pneumothorax .
    OUTPUT:
    
No acute pulmonary edema . Chronic smoking related lung disease , best demonstrated on prior CT thorax .