American Registry of Radiologic Technologists (ARRT), a national certifying body for radiologic technologists in the disciplines of radiation therapy, nuclear medicine, radiography, mammography, computed tomography, magnetic resonance imaging, quality management, sonography, bone densitometry, vascular sonography, breast sonography, vascular-interventional radiography, cardiovascular-interventional radiography, and radiologist assistant. Certification is awarded following passage of an examination in each of these areas.
