Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . 8 battery pack is seen overlying the left lower chest . Cardiac and mediastinal silhouettes are stable . Right base opacity is stable , possibly atelectasis although underlying infection not excluded . Interval removal of right - sided chest tube . No pneumothorax is appreciated on the current study .
    OUTPUT:
    
Interval removal of right - sided chest tube . No pneumothorax appreciated on the current study . Persistent right base opacity , most likely atelectasis but infection not excluded in the appropriate clinical setting .