Is it dangerous to use x-ray for medical purposes?

Yes.it is dangerous to both the patient and technician . but if we following the steps prevention of radiation .there is no problem at all in this

yes! it is dangerous for both patient and technician . thats why,it must apply the proper use of factoring of high kv and low mas for the patient with the use of gonadal shield and safe distance and barrier for the technologist. so that every body will be in safe.

no.
it's main purpose is to help the physician to get more reliable diagnostic result to the patient and help the patient to take more accurate treatment in his/her disease but if not proper use or abuse of using the x-ray can cause early damage or late effect damage to the human cells.