Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate hyperinflated lungs with flattened diaphragm consistent with emphysema . Chronic left pleural effusion is essentially unchanged . Linear scarring in the left mid lung zone is a consequence of pleurodesis . Biapical pleural thickening is unchanged . No pneumothorax is identified . Cardiac and mediastinal contours are within normal limits .
    OUTPUT:
    
Unchanged left pleural effusion and linear scarring in the left mid lung zone with no evidence of pneumothorax .