ARDMS is the credentialing body associated with all Diagnostic Ultrasound studies including Echocardiography (cardiac ultrasound) and Vascular Ultrasound.

ARDMS awards the following three credentials:

  • Registered Diagnostic Medical Sonographer (RDMS)
  • Registered Cardiac Sonographer (RDCS)
  • Registered Vascular Technologist (RVT)

The ARDMS does not credential in EKG, Stress, or Holter Monitoring.

RDCS versus RCS Credential

The RDCS credential is awarded by the ARDMS. The RCS credential is awarded by CCI. Both credentials are accepted credentials in the field of cardiac ultrasound.

To learn more about the ARDMS, go to http://www.ardms.org



CCI administers certification examinations to health care professionals in Invasive (Cardiac Catherization), Non-Invasive (Echocardiography), Vascular Ultrasound, and Cardiography (EKG, Stress, and Holter Monitoring).

CCI is the credentialing body devoted to Cardiovascular Technology and awards the following credentials:

  • CCT - Certified Cardiographic Technician
  • RCIS - Registered Cardiovascular Invasive Specialist
  • RCS - Registered Cardiac Sonographer
  • RVS - Registered Vascular Specialist
RVT versus RVS Credential

The RVT credential is awarded by the ARDMS. The RVS credential is awarded by CCI. Both RVT and RVS are accepted credentials in the field of vascular ultrasound.

To learn more about CCI, go to http://cci-online.org



Breast Sonography for Mammographers has been created for Registered Mammographers who are interested in obtaining ARRT certification in Breast Sonography. The course covers the ARRT content outline of the Breast Sonography Certificate Examination and should enable the student to successfully challenge this examination. The course offers all mammographers an excellent opportunity to obtain a full and comprehensive knowledge of breast sonography from the normal anatomy to benign and malignant features.


To learn more about sonographer and sonography laboratory credentialing, see Accreditatoin/Credentialing Bodies

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