Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided chest tube and mediastinal drains are unchanged . A right - sided PICC line has been retracted , and now terminates at the junction of the right subclavian vein and SVC . Lung volumes are low . Bibasilar subsegmental atelectasis with left lower lobe collapse is unchanged . There is also likely a small layering left pleural effusion . Cardiomegaly despite the projection is stable . Retrocardiac opacification is likely due to atelectasis . Lower right rib fractures re-demonstrated .
    OUTPUT:
    
The only appreciable interval change is slight retraction of the right - sided PICC line , which now terminates at the junction of the right subclavian vein and SVC . To reposition the catheter within the lower SVC , advancement by at least 6 - 7 cm is advised .