ARDMS SPI Exam Prep - Pass Guaranteed
Master ultrasound physics with 1,150+ questions and video lessons.
The SPI exam is required for every ARDMS credential. Prepry breaks down complex physics concepts into digestible lessons so you can pass with confidence.
Official Exam Information
Sonography Principles & Instrumentation
ARDMS • Required for RDMS/RDCS/RVT
~110
Total Questions
2 hours
Exam Duration
120 minutes
$275
Exam Fee
USD
555
Passing Score
Scale: 300-700
Content Domains
Perform Ultrasound Examinations
Manage Ultrasound Transducers
Optimize Sonographic Images
Apply Doppler Concepts
Provide Clinical Safety & Quality Assurance
Retake wait period: 60 days • Max 3 attempts per year
Comprehensive Physics Coverage
Master Every SPI Topic
Our question bank covers all ARDMS SPI content specifications with detailed explanations.
Sound Wave Fundamentals
- Frequency & wavelength
- Propagation speed
- Acoustic impedance
- Attenuation
Transducers & Instrumentation
- Piezoelectric effect
- Array types
- Beam focusing
- Resolution
Doppler Principles
- Doppler equation
- Spectral analysis
- Color flow imaging
- Power Doppler
Image Artifacts
- Reverberation
- Shadowing
- Enhancement
- Mirror image
Image Quality & Optimization
- Gain settings
- TGC/DGC
- Dynamic range
- Persistence
Bioeffects & Safety
- Thermal index
- Mechanical index
- ALARA principle
- Output standards
Your Complete Study Kit
Why Students Pass with Prepry
Pass Guarantee
Complete 80% of SPI questions and don't pass? We'll extend your subscription free until you do.
1,150+ Physics Questions
Comprehensive question bank covering all SPI content specifications with detailed explanations.
Video Lessons
Visual explanations of complex physics concepts. Finally understand Doppler equations and artifacts.
110-Question Mock Exam
Full-length practice exam that simulates the real SPI testing experience.
Track Your Progress
See exactly where you stand on each physics topic. Identify weak areas and focus your study time.
Web, iPhone & Android
Study physics concepts anywhere—on the web, iPhone, or Android.
Expert Video Lessons
Watch 32 video lessons (9.1 hours) taught by credentialed sonographers
Jenna Laquerre
Video InstructorMS, R.T.(R)(ARRT), RDMS (AB, OB/GYN, PS, BR), RVT
Lead Educator and Content Director at Prepry. Experienced sonographer and adjunct instructor at Palm Beach State College with extensive clinical experience across multiple specialties.
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Welcome to Prepry
Physics Fundamentals
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The Basics of Sound: Part 1
Physics Fundamentals
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The Basics of Sound: Part 2
Physics Fundamentals
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All About Sound Waves: Part 1
Physics Fundamentals
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All About Sound Waves: Part 2
Physics Fundamentals
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Pulsed Ultrasound
Physics Fundamentals
32
Video Lessons
9.1+
Hours of Content
Expert
Credentialed Instructors
Success Stories
Learners Who Passed Their ARDMS® SPI
“Physics was always my weakest subject. The Prepry video lessons finally made Doppler equations make sense. Passed my SPI on the first try!”
Michelle S.
RDMS (AB), Class of 2024
“The artifact questions were exactly like the real exam. I felt so prepared walking into the testing center.”
Carlos M.
RDMS, Sonography Student
“I failed the SPI twice before finding Prepry. The detailed explanations helped me finally understand the physics. Passed on my third attempt!”
Lauren K.
RVT, Repeat Test Taker
Expert-Created Content
Meet Your Sonography Principles and Instrumentation (SPI) Team
Our content is created and reviewed by credentialed professionals with real-world clinical experience.
Content Author
Michael Zaladonis
MBA, RVT
AuthorFounder and developer of Imago AI LLC, specializing in innovative medical education applications for ultrasound professionals. With over 10 years of experience in app development and 15 years in vascular sonography, I deliver high-quality, user-friendly products. Prepry - ARDMS & CCI Exam Prep is the top-rated ultrasound registry review app in the App Store and Google Play.
View ProfileContributors
Jenna Laquerre
MS, R.T.(R)(ARRT), RDMS (AB, OB/GYN, PS, BR), RVT
ContributorExperienced Educator and Educational Content Developer with a focus on sonography and radiography. With numerous certifications and a strong clinical background, I contribute to professional organizations and publish extensively. Adjunct instructor at Palm Beach State College.
View ProfileReviewers
Sheryl E. Goss
MS, RT(R)(S), RDMS, RDCS, RVT, RVS, FSDM
ReviewerChair of Diagnostic Medical Sonography at Misericordia University. ARDMS certified in RDMS (Abdominal, Ob/GYN, Breast, Neurosonology), RDCS (Adult, Pediatric, Fetal Echocardiography), RVT, and CCI RVS. ARRT certified in Radiography and Sonography.
View ProfileVideo Instructors
Jenna Laquerre
MS, R.T.(R)(ARRT), RDMS (AB, OB/GYN, PS, BR), RVT
VideoLead Educator and Content Director at Prepry. Experienced sonographer and adjunct instructor at Palm Beach State College with extensive clinical experience across multiple specialties.
View ProfileOne Price. Every Exam.
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Everything included:
- Pass Guarantee — 3 extra months free if you don't pass
- All specialty exams included
- 6,765+ practice questions with detailed explanations
- Video lessons for complex topics
- Study reminders & exam countdown
- Available on Web, iPhone & Android
- Priority email support
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