The X-ray for passengers is only for metal objects (arms all sorts) and in some cases explosives. The X-ray for suitcases are for weapons and bombs.

No drug control by X-ray, since X-ray only detect metal objects. Sniffer dogs are used for drugs hunting as well as explosive hunting.

In the X-ray you don’t only see metal objects. Everything leaves a shadow, and it depends on the skill of the operator to interpret them. Other possibility is a computerized interpretation, but I have no idea how far such a technology is developed.

Affraid that you dirty money is detected on the way to Zurich? 😀