The NMTCB is the Nuclear Medicine Technology Certification Board, formed for the purpose of creating and maintaining examinations for nuclear medicine technologists(NMTs). Since 1978, the NMTCB has offered a high-quality certification exam for NMTs. More recently, the NMTCB has provided specialty exams for NMTs who have a high level of knowledge in nuclear cardiology (the NCT exam), NMTs, radiographers, and radiation therapists who have a high level of knowledge in positron emission tomography (the PET exam) and NMT's who have graduated from a recognized Master's level program as a Nuclear Medicine Advanced Associate (the NMAA exam).