Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Scarring of the lung parenchyma and a left chest wall deformity are stable . Hyperinflated lungs with lucency reflect known emphysema . The previously seen left retrocardiac opacity has cle resolved ared . No focal opacity . Prominent interstitial markings may indicate mild edema . There is no pleural effusion or pneumothorax . The heart size is top normal . The aortic knob is calcified in the aorta is ectatic . There is no free air beneath the right hemidiaphragm .
    OUTPUT:
    
Mild interstitial edema superimposed on a background of severe emphysema . No signs of pneumonia or pneumothorax .