Radiologist or radiologic technician as a career consists of the use of ionizing radiation to diagnose patient illnesses. Although at times referred to as x-ray technicians, the field of radiology technician also includes ultrasound, fluoroscopy, MRI, and nuclear medicine technicians. Radiology tech careers propose high income-earning potential and mobility due to the ubiquitous nature of health care and the almost worldwide demand for radiology professionals in hospitals, laboratories, clinics and. nursing homes.