Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy tube and right approach central venous catheter are in unchanged expected position . Median sternotomy wires appear intact . Overall , aeration of the left lung with areas of loculated left pleural air appear unchanged . A small amount of left chest wall air is also stable . Right lower lobe opacity , likely a combination of atelectasis and moderate effusion is unchanged .
    OUTPUT:
    
1 . Overall similar appearance of the left hemithorax status post thoracotomy and decortication . 2 . Unchanged probable right lower lobe atelectasis and moderate effusion .