Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study dated ___ . The heart size is normal and unchanged . As before , mild mediastinal shift towards the left side is present but appears stable . Mild volume reduction of the left hemithorax related to previously performed left upper lobectomy . New surgical clips in hilar region can be seen . The postoperative changes of the vasculature with reduction of hilar contours are unchanged . Mild elevation of left diaphragm as before . No evidence of pneumothorax or new parenchymal abnormalities . No pulmonary vascular congestion .
    OUTPUT:
    
Satisfactory findings on postoperative followup examination .