Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright portable view of ___ chest demonstrates left PIC catheter tip projecting over confluence of brachiocephalic veins . Lungs are clear without focal consolidation , pleural effusion or pneumothorax . Hilar and mediastinal silhouettes are unchanged . Aortic arch calcifications are again noted . Heart size is top normal . No pulmonary edema .
    OUTPUT:
    
Left PIC catheter tip projects at ___ level of confluence of brachiocephalic veins .