Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are intact and aligned . The patient has had previous CABG . The Swan - Ganz catheter and left pectoral pacemaker are unchanged in position . The distal aspect of the right PICC line likely projects well into the right atrium . Left basilar subsegmental atelectasis has slightly improved . Layering small left pleural effusion is unchanged .
    OUTPUT:
    
Tip of right PICC line projects well into the right atrium . Retraction by 10 cm would position its tip in the low SVC . No significant interval change in mild pulmonary edema with a small left pleural effusion .