ARDMS SPI Study Guide 2026
Everything you need to pass the ARDMS SPI exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ARDMS SPI Exam Format at a Glance
📚 ARDMS SPI Topics to Study (21)
✍️ Sample ARDMS SPI Questions & Answers
1. A spectral Doppler waveform displaying a mirror image of the true waveform simultaneously on both sides of the baseline is most likely caused by:
Cross-talk (ghosting or mirror image artifact) in spectral Doppler occurs when the Doppler gain is set too high, causing the waveform signal to bleed through to the opposite side of the baseline.
2. Which of the following is an ergonomic device built into sonographic equipment for the sonographer's musculoskeletal safety?
Monitor articulation allows sonographers to adjust the display screen's height, tilt, and swivel to their individual needs and scanning position. This ergonomic feature helps reduce neck, back, and eye strain by promoting a neutral posture during examinations. By minimizing physical discomfort and awkward positions, it directly contributes to musculoskeletal safety and helps prevent work-related injuries.
3. A phased array transducer achieves electronic steering and focusing of the ultrasound beam by:
Phased array transducers consist of multiple small piezoelectric elements that are activated in complex patterns. By introducing minute time delays (phasing) in the electrical pulses sent to each element, the resulting ultrasound wavefront can be steered in different directions and focused electronically without physically moving the transducer.
4. A sonographer performs a sensitivity test as part of a quality assurance protocol. This test is designed to assess the system's ability to:
Sensitivity, also known as maximum depth of penetration, evaluates the ability of the ultrasound system to detect and display the weakest-amplitude echoes from reflectors located deep within a phantom. It is a measure of the system's overall performance in penetrating tissue and receiving faint signals.
5. Which control is adjusted to change the size of the color Doppler sample box?
The color box size or region of interest control determines the area over which color Doppler information is displayed, directly affecting frame rate.
6. Which of the following statements is true regarding the relationship between axial and lateral resolution?
Axial resolution is determined by the spatial pulse length, which does not change as the beam travels through tissue. Therefore, axial resolution is constant at all depths. Lateral resolution, however, is determined by the beam width. The beam width changes with depth, being narrowest at the focal zone and widening in the near and far fields. This means lateral resolution varies with depth.