State of Minnesota Statute 144.121, subd. 5 states, a) An individual in a facility with x-ray systems for use on living humans that is registered under subdivision 1 may not operate, nor may the facility allow the individual to operate, x-ray systems unless the individual has passed a national or state examination.
(b) Individuals who may operate x-ray systems include:
(1) an individual who has passed the American Registry of Radiologic Technologists (ARRT) registry for radiography examination.
https://www.revisor.mn.gov/statutes/cite/144.121
According to the American Registry of Radiologic Technologist (ARRT), one must meet the education and ethics requirements before being eligible to take the credentialing exam.
In order to meet the education and ethical requirements you must have:
Earned an associate's degree or higher
https://www.arrt.org/pages/earn-arrt-credentials/initial-requirements/primary-requirements
The Radiography Program at Riverland Community College is an ARRT-approved education program accredited by the Joint Review Committee on Education in Radiologic Technology (JRCERT), where you will earn an Associate of Applied Science (AAS) degree at the successful completion of the program. This degree, along with meeting the ethics requirements, allows one to take the ARRT Credentialing Exam required by the State of Minnesota to operate ionizing radiation equipment.
Alabama, Washington D.C., Missouri, South Dakota, and Georgia do not require a license.
Listed on the ASRT website at the link above, are specific links to each state’s information regarding radiologic technologist licensure, certification or recognition.