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http://www.ardms.org/credentials_examinations/sonography_principles_instrumentation_spi_examination_information_page/overview_of_the_spi_examination

Overview of the SPI Examination

Sonography Principles & Instrumentation (SPI) Examination

The SPI examination meets the fundamental physical principles and instrumentation requirements for the RDMS RDCS and RVT credentials.

Sonography professionals wanting to earn an ARDMS credential are required to pass both the SPI examination and a corresponding specialty within five years*. Once the SPI examination is passed, applicants may earn multiple credentials without having to repeat any physical principles and instrumentation requirements (within ARDMS application guidelines). To view the ARDMS Examination Pathways chart, click here.

Active Registrants are not required to take the Sonography Principles and Instrumentation (SPI) examination to maintain current credentials; they need to take the SPI examination only if they want to earn an additional credential.

The SPI examination tests basic physical principles and instrumentation knowledge required for all sonography professionals and students.