Most SPI candidates do not fail for lack of effort. They spread their time evenly across topics, when the exam does not. ARDMS publishes the content outline with the percentage of the exam each domain carries, and the fastest way to improve a study plan is to let those percentages decide where the hours go.
Below are two schedules: a 30-day sprint for candidates who already know the material and need to consolidate, and a 45-day plan for candidates who are closer to learning it the first time. Both use the same structure, and you can stretch or shrink either one. If you would rather have a longer, week-by-week version, see our 6-week blueprint.
What the exam looks like
According to ARDMS, the SPI exam has approximately 110 multiple-choice questions over two hours (including a five-minute survey). It is scored pass/fail on a 300–700 scale, and a score of 555 or better passes. The score is not a percentage and is not curved. Details change, so check the official SPI page before you commit to a test date. For the rules on fees and retakes, see SPI exam cost, scoring and retake rules.
Step 1: Split your hours by domain weight
The current content outline (V24.1) weights the five domains as shown below. The hour counts are simple arithmetic on those percentages, for a 60-hour plan (30 days at about 2 hours a day) and a 90-hour plan (45 days at about 2 hours a day). They are a starting point, not a prescription.
| Domain | Exam weight | Hours (30-day, 60 h) | Hours (45-day, 90 h) |
|---|---|---|---|
| Domain 4: Apply Doppler Concepts | 34% | 20 | 31 |
| Domain 3: Optimize Sonographic Images | 26% | 16 | 23 |
| Domain 1: Perform Ultrasound Examinations | 23% | 14 | 21 |
| Domain 5: Clinical Safety & Quality Assurance | 10% | 6 | 9 |
| Domain 2: Manage Ultrasound Transducers | 7% | 4 | 6 |
Then adjust for your own gaps. If a diagnostic practice test shows you are already strong in transducers, move those hours to Doppler. The weights tell you where points are available; your results tell you where you are losing them. Our blueprint guide explains each domain in detail.
Step 2: Take a diagnostic before you start
On day 1, take a short practice set cold. The goal is not a score; it is a list of topic areas where you guess. Our free 10-question SPI practice test needs no account and works for this. Write down every topic you missed or guessed, and use that list to adjust the hour split above.
The 45-day schedule
| Days | Focus | What to do |
|---|---|---|
| 1–2 | Diagnostic and setup | Diagnostic set, read the official content outline, set your exam date, book your daily study slot. |
| 3–12 | Foundations and transducers | Sound waves, frequency, wavelength, attenuation, impedance, pulse-echo principles, transducer construction and beam properties. Start flashcards on day 3 and review daily. |
| 13–24 | Image optimization | Resolution (axial, lateral, elevational, temporal), frame rate trade-offs, gain and TGC, harmonics, compounding, display modes. |
| 25–34 | Doppler and hemodynamics | Doppler equation and angle, PRF and the Nyquist limit, aliasing fixes, wall filters, spectral, color and power Doppler, flow physics. Practice with the Nyquist calculator. |
| 35–40 | Artifacts, safety and QA | Artifact recognition and fixes, bioeffects and ALARA, QA testing and phantoms, patient care and ergonomics. |
| 41–44 | Timed practice and review | One or two full timed practice exams (two hours). Spend twice as long reviewing misses as you spent taking the test. |
| 45 | Light review | Formula sheet and weak-topic flashcards only. Sleep. |
The 30-day sprint
Compress the same order into four weeks, and assume you have already met this material in your program:
- Week 1: diagnostic, then foundations, transducers and pulse-echo principles. Flashcards daily from day 2.
- Week 2: image optimization and display modes. First timed practice block (40–50 questions) at the end of the week.
- Week 3: Doppler and hemodynamics, your largest block of time. Work every aliasing and angle problem you can find.
- Week 4: artifacts, safety and QA for the first three days, then two full timed practice exams with full review, then light review the day before.
A daily routine that works in either plan
- 15–20 minutes of flashcards first. Spaced repetition works by returning to material just before you would forget it, so daily short reviews beat occasional long ones. See how spaced repetition works for the SPI.
- 45–60 minutes on the day's topic. Read, then close the book and explain it aloud or on paper.
- 15–20 minutes of practice questions on that topic, reviewing every rationale, including the ones you got right.
- Keep an error log. For each miss, write the concept, why you chose the wrong answer, and the rule that would have gotten it right. Re-read the log weekly.
When to sit practice exams
Sit your first full-length timed exam when you have covered most of the material, not before. Two full exams with thorough review is usually more useful than five taken without review. A practice score cannot predict your real score, so treat it as a tool for finding topics to study, not a pass prediction. For pacing strategy on the real exam, see our test-taking strategies.
The last-week checklist
- Confirm your appointment, location and accepted ID on the official site.
- Re-read your error log and the formula sheet.
- Do short, mixed review sets rather than new material.
- Plan the morning: food, travel time, and arriving early.
Want the practice tools built for this plan? The SPI Flashcards and Exam Simulator cover the daily review and timed-practice steps above, and the Premium Bundle includes both for 45 days.
Written by the SonoPrep Editorial Team. Exam details come from ARDMS / Inteleos and the published content outline, checked September 29, 2026. SonoPrep is not affiliated with ARDMS and cannot guarantee exam results.