Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest on ___ at 03 :49 is submitted .
    OUTPUT:
    
Nasogastric tube is seen coursing below the diaphragm with the tip not identified . Right internal jugular Swan - Ganz catheter has its tip in the right pulmonary artery . Endotracheal tube continues to have its tip approximately 3 cm above the carina . A right basilar chest tube remains in place along with the mediastinal drains . Status post median sternotomy with stably widened cardiac and mediastinal contours in this recently postoperative patient . Layering left effusion with retrocardiac opacity likely reflecting compressive atelectasis . The mild interstitial edema is improving , although there is still likely a component of mild perihilar edema . No large pneumothorax is appreciated .