Radiographers and radiation therapists are covered by provisions of the Consumer-Patient Radiation Health and Safety Act of 1981, which aims to protect the public from the hazards of unnecessary exposure to medical and dental radiation by ensuring operators of radiologic equipment are properly trained. The act requires the Federal Government to set standards that the States, in turn, may use for accrediting training programs and certifying individuals who engage in medical or dental radiography. Because ultrasound does not use ionizing radiation, sonographers are excluded from this act. No State requires that sonographers be licensed. To become registered, technologists must be graduates of an accredited program or meet other prerequisites and have passed an examination.
Many employers prefer to hire registered technologists.
Radiographers and radiation therapists are required to fulfill 24 hours of continuing education every other year and provide documentation to prove that they are complying with these requirements. Sonographers must complete 30 hours of continuing education every 3 years. Depending on the institution, courses or a master's degree in business or health administration may be necessary for the director's position. With additional education, available at major cancer centers, radiation therapy technologists can specialize as medical radiation dosimetrists . Most technologists were radiographers.