Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided PICC line within the right atrium . The nasogastric tube needs to be advanced right with the side - port in the midesophagus . There is persistent retrocardiac opacity , with associated effusion . There is increasing subsegmental atelectasis within the left lung . The heart remains enlarged . No pneumothorax .
    OUTPUT:
    
The right - sided PICC is within the right atrium . The nasogastric tube needs to be advanced approximately 4 cm . Increasing subsegmental atelectasis , persistent left retrocardiac opacity with small left - sided effusion .