Certified and registered by ARDMS in three specialties. Vascular Technology is a required specialty. Pediatric Sonography or Obstetrics and Gynecology Sonography, or Abdomen Sonography or Musculoskeletal Sonography are options for the additional certifications required. The expertise of the Sonographer III must match the examination demographics of the hiring site. Breast Sonography is excluded from one of the three required, required. Vascular Technology – by ARRT in Vascular Sonography; RT(S)(VS) or RDMS, RT(VS) or, ARDMS in Vascular Technology; RDMS, RVT, VT or by CCI in Vascular Ultrasound; RT(S), RVS or RDMS, RVS, required. Pediatric Sonography – RDMS, PS or Obstetrics/Gynecology – RDMS, OB/GYN or Musculoskeletal Sonography; RDMS, RMSKS, MSKS, required. Applicable state license, required.