The biggest difference between a radiologic technologist and technician is their level of education and scope of responsibilities.
Technologists (also called radiographers) typically hold an associate or bachelor’s degree and carry extended capability to perform many kinds of diagnostic imaging procedure: x-rays, CT scans, sonograms, mammograms, etc. With an associate degree you may cross train into these types of specialties. Cross training may be done on the job or on your own and does not require an additional degree.
Technicians are more limited in what procedures they can perform depending on the state in which they practice. Technicians generally do not have a degree and often have no formal training. In the state of Florida, technicians are considered to have limited scope and may not work in hospitals or emergency rooms.