The devices that scan the luggage with X-rays are shielded so very little leaks out. They are large metal boxes with a scanner inside and the wall of them absorbs X- rays. The ray is also going in one direction, up or down so not toward where the baggage enters and exits.

The curtains the luggage passes through are rubber with lead in them and are X-ray shields. You have multiple of them per side if I am not mistaken.

So the number of X-Rays that leak out is minimal.

We do not use a small contained unit like that for humans because it would be quite impractical and not a great experience for the patient. We use larger protective boxes that fit humans and are not claustrophobic this is whole rooms