Does irradiation of food make the food radioactive?

No. Food products only come in contact with the radiations energy; it does not come into contact with an actual source of radiation or radioactive materials. The ionizing radiation produced by Rapiscan scanning machines is not strong enough to disintegrate the nucleus of even one atom of any food molecule. Another way to view this is to think of a trip to the doctor to have a broken arm x-rayed. Did that procedure make your arm radioactive? No, it didn’t. Likewise, food does not become radioactive when passed through a scanning machine.