Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-erect chest radiograph ___ at 16 : 19 is submitted .
    OUTPUT:
    
Right subclavian PICC line now has its tip in the distal SVC . Nasogastric tube is difficult to visualize but is felt to be coursing below the diaphragm with the tip not identified . The left lung is grossly clear . There is volume loss in the right upper lung . No pulmonary edema . No pneumothorax . Overall cardiac and mediastinal contours are stable .