Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Changes of right upper lobectomy are seen , with hilar / mediastinal clips and chain suture , hilar retraction and apical pleural thickening or loculated fluid . Left lung apex is scarred , but both lower lungs are clear . Heart size is normal . There is no obvious pneumomediastinum , but the esophagus may be dilated above the ___ of the carina . There is no pneumothorax or free air under the diaphragm .
    OUTPUT:
    
1 . Probable right upper lobectomy , and left upper lobe scarring . 2 . No evidence of acute intrathoracic process . 3 . Retrotracheal esophagus may be dilated . CT scanning would be required for its assessment and examination of the surrounding mediastinum .