Thank you for your interest in taking the Sonography Principles and Instrumentation (SPI) examination. The ARDMS SPI exam is the first step in earning future ARDMS credentials. The SPI exam tests the requisite physical principles and instrumentation knowledge, skills and abilities  essential to sonography professionals and students.

To earn an RDMS, RDCS, RVT and RMSKS credentials, you must pass the ARDMS SPI exam and a corresponding specialty examination within five years. After passing the ARDMS SPI exam, you can earn additional credentials without having to retake the SPI exam, provided you maintain active status.