Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest tube is in place . Right arterial line is in place . Improving small left pleural effusion with overlying atelectasis . Stable small left apical pneumothorax . Unchanged left chest wall and bilateral neck subcutaneous emphysema . Persistent pneumomediastinum . Normal size of cardiac silhouette . No focal parenchymal opacity suggesting pneumonia . No pulmonary edema . Right lung is clear . Sternotomy clips are intact . Stable ACDF hardware .
    OUTPUT:
    
Unchanged small left apical pneumothorax and subcutaneous emphysema . Interval improvement in a small left pleural effusion with left chest tube in place .