Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tip of left PICC terminates in the mid superior vena cava . Heart size is normal , and lungs and pleural surfaces are clear . Apparent small , subcentimeter radiodense foreign body overlying sixth left posterior rib is unchanged since outside chest radiograph of ___ and projects in the anterior chest wall on a prior lateral chest radiograph of ___ .
    OUTPUT:
    
Left PICC terminates in mid superior vena cava .