When working in all other states: Credentialed with the American Registry of Radiologic Technologist (ARRT), American Registry of Diagnostic Medical Sonographers (ARDMS), or Cardiovascular Credentialing International (CCI), or registry eligible is required within 18 months of hire. Operates the ultrasound equipment to produce and record images of the motion, shape, and composition of blood, organs, tissues, or bodily masses, such as fluid accumulations.