Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval replacement of the left Swan - Ganz catheter for a central venous catheter , which terminates in the low SVC . Otherwise , there is no significant change compared to ___ with stable post-operative mediastinum , cardiomegaly , persistent low lung volume with atelectatic change , - with unchanged position of left chest tube and right dual - lumen dialysis catheter . There is no pneumothorax .
    OUTPUT:
    
Little interval change compared to ___ , with persistent low lung volumes and atelectatic change with replacement of left Swan - Ganz for an appropriately placed central venous catheter . No pneumothorax .