Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right internal jugular central venous catheter tip terminates in the proximal right atrium . Heart size remains moderately enlarged . The patient is status post median sternotomy and CABG . Mild pulmonary edema persists . There is a persistent small left pleural effusion and retrocardiac opacification possibly reflecting atelectasis but infection and aspiration can not be excluded . No pneumothorax is identified .
    OUTPUT:
    
Right internal jugular central venous catheter tip terminates within the proximal right atrium . Persistent mild pulmonary edema , small left pleural effusion , and retrocardiac opacity , possibly reflecting atelectasis , infection or aspiration .