Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest shows stable left lung asymmetry due to left upper lobectomy , the left lung base opacity is minimally improved since ___ due to increased lung ventilation . There is no pneumothorax . Cardiomediastinal silhouette is normal . The posterior left chest wall osteotomy is due to thoracotomy .
    OUTPUT:
    
Stable left lung asymmetry in a patient who has had left upper lobectomy and thoracotomy . Improvement of left lung base opacity with improved lung ventilation .