Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right dual - lumen central venous catheter terminates in the proximal right atrium . The left PICC line terminates in the right atrium , possibly within the right ventricle as was noted yesterday . A new nasogastric tube has its tip projecting over the stomach . The tip turns and head cephalad but appears to be within the stomach . Lung volumes are low , resulting in mild vascular crowding not significantly changed . The heart is top normal . The retrocardiac opacity is unchanged and may represent atelectasis or small pleural effusion . There is no pneumothorax .
    OUTPUT:
    
1 . Left PICC line is unchaned in position terminating in the right heart and should be withdrawn 8 cm to place the tip in the low SVC . 2 . Nasogastric tube projects over the expected location of the stomach . 3 . Retrocardiac opacity is unchanged and may represent atelectasis or small pleural effusion , infection can not be excluded .