SonoPrep Blog
Study guides, physics breakdowns, exam strategies, and credential comparisons — written by credentialed sonographers for SPI exam candidates.
SPI Study Plan: A 30- and 45-Day Schedule Built on the Official Content Outline
Two realistic schedules that divide your hours by the official domain weightings, with a daily routine, practice-exam timing and a last-week checklist.
ARDMS SPI Exam Cost, Format, Scoring and Retake Rules (2026)
The $275 fee, 300–700 scoring with 555 to pass, the 60-day retake wait, and ARDMS's published 2013–2023 pass rates, all from official sources.
The Complete ARDMS SPI Exam Guide: Everything You Need to Pass
Domain weightings, a proven six-week study plan, common mistakes, and practical ways to prepare with confidence.
ARDMS SPI Exam Content Outline V24.1: Domain Weightings Explained
A breakdown of the official ARDMS content outline — how the exam's domain weightings can guide your study-time allocation.
Doppler Principles for the SPI Exam: Nyquist, Aliasing & Spectral Analysis
Doppler is one of the most heavily weighted areas of the SPI exam. Master Nyquist limits, aliasing, spectral analysis, and exam-style Doppler concepts.
Ultrasound Physics for the SPI Exam: The 6 Concepts That Actually Appear
Cut through the noise. These are the physics concepts responsible for the majority of SPI exam questions, explained so they actually stick.
Ultrasound Artifacts: The 7 Most Common SPI Exam Questions
Reverberation, shadowing, comet-tail, mirror image — the ARDMS tests these every time. Learn to identify and explain each one.
How to Pass the SPI Exam on Your First Attempt: A 6-Week Blueprint
A week-by-week schedule built around the ARDMS blueprint, designed to get you exam-ready in 42 days.
Spaced Repetition for SPI Exam Success: Why Active Recall Beats Cramming
The science behind why SonoPrep's flashcard system is built on SM-2 spaced repetition — and how to use it to retain physics concepts long-term.
SPI Exam Test-Taking Strategies: Eliminate Wrong Answers & Manage Time
How to handle tricky ARDMS question stems, eliminate distractors, and keep your pace across approximately 110 questions over two hours.
RDMS vs RDCS vs RVT vs RMSKS: Which ARDMS Specialty Is Right for You?
A practical comparison of the four ARDMS specialty credentials — clinical requirements, exam structure, job market, and how to choose your path.
Ready to put this knowledge to work? SonoPrep's exam simulator and flashcard system are built around the exact domains covered in these articles.