Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Following left chest tube placement , left tension pneumothorax has substantially resolved . Small residual pneumothorax persists , but no evidence of tension . Small amount of pneumopericardium is likely related to recent surgery . Minimal atelectasis is present in the left lung base . There is no pleural effusion . Patient is status post median sternotomy , and sternal sutures are intact . Postoperative mediastinal widening and mildly enlarged heart size are stable . Endotracheal tube ends approximately 1 .7 cm above the carina . Consider retracting the ET tube by 2 cm for appropriate seating . Orogastric tube ends into the stomach , and a Swan - Ganz catheter through the right internal jugular approach terminates approximately in the right main pulmonary artery .
    OUTPUT:
    
Following left chest tube placement , a left pneumothorax has markedly decreased in size with small residual basilar pneumothorax .