Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild improvement but again angulation of the left subclavian PICC line tip indicating placement within the azygos vein . Mediastinal contours remain unchanged . The lungs are clear . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Tip of the left subclavian PICC line remains within the azygos vein