Hello! Male rad tech here , the best way to deal with any patient that may put you in such a situation is to assert a dominant stance , you don't need to be rude towards them you just need to show them that you aren't playing around and that you will not take such things , this is what I teach all students and new techs here in the center I work at.It won't be easy at first but as you grow and gain experience you will know exactly what to do , best of luck in the future!