Can't you have one or more x-ray tunnels or other scanners? They don't even need to be actively monitored, just treated like CCTV.

Receving a full body x-ray every day just for a week would exceed the yearly federal occupational dose for radiation workers. You would add an additional 26% lifetime chance of getting cancer doing this for a year.

The yearly limit for rad workers is 5000 mrem with most receiving none. Receiving any dose is usually a cause for concern at most facilities that handle radioactive materials. A full body x-ray would dose you with about 1000 mrem. For about every 10000 mrem you receive, you gain an additional 1% chance of lifetime cancer risk. There's a reason why you wear a lead apron when getting X-rays at the doctor's office and why the technician leaves the room.

Metal detectors would be a much more reasonable method. People that work at airports, courts, jails, some schools, and even some manufacturing facilities walk through metal detectors daily.