Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is mildly enlarged . Aorta contours are still enlarged and tortuous The right upper mediastinal border persists enlarged for know mediastinal lesion , with contralateral displacement of the trachea Tracheal stent is projected slightly off center towards the right lung , but correctly positioned . 2 new linear opacities are appeared in left base and right mid-lung field , which are probably linear atelectasis There are no sign of pleural effusion and pneumothorax
    OUTPUT:
    
There is no pneumothorax after trachea stent placement . Linear atelectasis bilaterally