Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting upright position . Comparison is made with the next preceding similar study of ___ . The heart size is mildly enlarged , but unchanged in comparison with previous study . There is a pulmonary congestive pattern with typical upper zone redistribution and perivascular haze throughout . This congestive pattern ; however , has improved mildly in comparison with the previous study . No evidence of new acute discrete parenchymal infiltrates and the lateral pleural sinuses are free . A previously existing right - sided PICC line is again identified and seen to terminate in unchanged position , some 3 cm below the level of the carina . This indicates the lower third of the SVC . No pneumothorax or any other possible placement - related complication .
    OUTPUT:
    
Unchanged appropriate position of right - sided PICC line .