The left jugular line tip (red circle) is in the left subclavian vein
It should take the course of the dotted line to lie in the region of the superior vena cava (red oval)
Usually a central line is placed on the right side (green line)
External oxygen tubing is also visible on the left (highlighted)
Many chest X-rays are performed to assess the position of medical equipment such as a naso-gastric tube or central line. When you are assessing a chest X-ray for this purpose, do not forget to look at the entire image systematically.