- What You Are Actually Studying For
- Confirm Eligibility Before You Open a Textbook
- Exam Format, Timing and Scoring in Plain Terms
- Reading the Blueprint: Where the 185 Scored Questions Live
- Image Production: The Domain That Decides Your Result
- Procedures: Breast Imaging and Intervention Knowledge
- Patient Care: Small Domain, Easy Points to Lose
- A Study Sequence Built Around the Blueprint
- Fees, Attempts and What Comes After You Pass
- Test-Day Mechanics for the 225-Minute Session
- Frequently Asked Questions
- The exam has 225 questions: 185 scored plus 40 unscored pilots, with 225 minutes of testing time.
- Image Production carries 105 of the 185 scored questions, so it deserves the largest share of your study hours.
- A passing score is 75 on the 1-99 scaled system, not 75% of questions correct.
- Eligibility requires 200 independent nonsimulated breast exams and 20 approved elective procedures within a 24-month window.
What You Are Actually Studying For
Before building a plan, pin down the credential. In this guide, RTBS refers to the Registered Technologist - Breast Sonography credential, which is the ARRT postprimary Breast Sonography (BS) certification issued by the American Registry of Radiologic Technologists. It is a different credential from the ARDMS Breast (BR) certification and from ARRT's general Sonography (S) credential. Study materials written for those exams overlap with this one in places, but the blueprint, scoring system and eligibility rules here belong to ARRT, and you should study against ARRT's document, not a generic breast ultrasound syllabus.
If you are still orienting yourself, the pages on what RTBS certification is and what RTBS stands for cover the basics. This guide assumes you already know you want the credential and need a plan to pass the first time.
Confirm Eligibility Before You Open a Textbook
RTBS is a postprimary credential, meaning ARRT expects you to hold a qualifying credential already. Many candidates lose weeks to paperwork they could have started on day one, so verify the following first. The full walkthrough is in RTBS requirements: eligibility, prerequisites and how to qualify.
Supporting-category credentials
You need one of these pathways:
- Current Radiography credential plus Mammography, or
- Sonography, or
- Vascular Sonography.
The Sonography and Vascular Sonography supporting credentials may be held through ARRT or ARDMS. The Vascular Sonography route is explicitly listed in the 2026 handbook's supporting-category table, so do not assume it is excluded if your background is vascular rather than general sonography.
Ethics, structured education and clinical experience
- Ethics: you must meet ARRT's ethics compliance requirements.
- Structured education: 16 hours completed within the 24 months before you apply, with at least one credit in each major category.
- Clinical experience: within the qualifying 24-month window, independently perform 200 nonsimulated breast examinations and participate in at least 20 approved elective procedures.
The logging rules matter. A bilateral examination counts as two. No more than nine procedures may be logged per day. Scanning must be physically onsite, and each mandatory examination must be presented to the radiologist for final interpretation. If you are planning your timeline, work backward from your application date so the clinical log and the education hours both fall inside the window.
Exam Format, Timing and Scoring in Plain Terms
The exam is delivered at a Pearson VUE testing center. Here is the structure at a glance:
| Feature | RTBS (ARRT Breast Sonography) |
|---|---|
| Delivery | Pearson VUE computer-based testing center |
| Total questions | 225 (185 scored, 40 unscored pilot) |
| Testing time | 225 minutes (the appointment itself is 245 minutes) |
| Question style | Mostly one-best-answer multiple choice; also multiple-response, sorting and image/video items as permitted |
| Book policy | Closed-book |
| Calculator | No personal calculator; test-center-supplied and on-screen options available |
| Passing score | 75 on the 1-99 scaled-score system |
Two details trip people up. First, the 245-minute appointment is not your testing time; the clock for questions is 225 minutes. Second, you cannot tell which 40 questions are unscored pilots, so treat every item as if it counts.
What "75" really means
The passing score is a scaled score of 75, not 75% correct. ARRT converts raw performance to a scaled score so that candidates on different exam forms are held to the same standard. The Standard Setting Report for Breast Sonography, effective September 2026, gives a form-specific raw-score equivalent and a projected pass rate. It is not a universal raw cutoff you can memorize, and it is not an observed 2026 cohort result. The practical implication: do not aim to "just clear" some imagined percentage. Aim for strong, broad command of all three domains. For a fuller explanation, see RTBS passing score: exactly what you need to pass.
What the pass-rate data does and does not say
ARRT's Annual Exam Report for 2025 lists a first-time pass rate of 78.1% among 146 candidates. That cohort took the exam before the September 2026 blueprint and passing-standard revision, so it is a useful sanity check rather than a forecast. It suggests that prepared candidates pass, and that a meaningful minority do not. For more context, read RTBS pass rate: what the data shows and how hard the RTBS exam really is.
Reading the Blueprint: Where the 185 Scored Questions Live
The official content specifications divide the scored questions among three major categories. These are question counts, not percentages, so keep them as counts:
| Domain | Scored Questions |
|---|---|
| Domain 1: Patient Care | 16 |
| Domain 2: Image Production | 105 |
| Domain 3: Procedures | 64 |
The allocations sum to 185, matching the scored-question total. Image Production is by far the largest domain, which has a direct consequence for how you divide your time. A candidate who spreads hours evenly across the three domains is under-investing in the one that determines the outcome. The complete domain-by-domain breakdown is in RTBS exam domains: complete guide to all 3 content areas.
Key Takeaway
Weight your hours roughly in proportion to scored questions, then add extra time to whichever domain your practice results show as weakest. Image Production first, Procedures second, Patient Care as a fast but disciplined third.
Image Production: The Domain That Decides Your Result
Image Production holds 105 scored questions, divided into three subcategories:
- Basic Principles of Ultrasound: 32
- Image Formation: 37
- Evaluation and Selection of Representative Images: 36
Basic Principles of Ultrasound (32 questions)
This is the physics foundation. Expect questions that ask you to reason about how sound behaves in tissue and how that affects the picture you see on a breast study.
- Wave properties, frequency and wavelength relationships, and why higher frequencies suit superficial tissue
- Attenuation, reflection, refraction and how interfaces change the returning signal
- Resolution concepts (axial, lateral, elevational) and what governs each
- Transducer types and why high-frequency linear arrays dominate breast work
- Doppler principles and the factors that influence flow detection
Image Formation (37 questions)
This subcategory is about the machine controls and processing that turn raw echoes into a diagnostic image. It is the largest of the three, so do not skim it.
- Gain, time-gain compensation, dynamic range and their effect on lesion conspicuity
- Focal zone placement, depth settings and frame rate trade-offs
- Compound imaging, harmonics and other processing features that change texture and artifact behavior
- Recognizing artifacts: posterior shadowing, posterior enhancement, edge shadowing, reverberation and their diagnostic meaning
- Color and spectral Doppler optimization for breast lesions
Evaluation and Selection of Representative Images (36 questions)
This is where clinical judgment meets image quality. You will likely meet image and video items here, asking you to assess what you are seeing and decide what to capture or adjust.
- Judging whether an image is technically adequate or needs a setting change
- Selecting which images best document a finding, and how that documentation supports the radiologist's interpretation
- Recognizing normal anatomy and normal variants versus findings that need further characterization
- Describing lesion features such as shape, margin, orientation, echo pattern and posterior features in standard terms
A practical note on this subcategory: practice describing lesions out loud using standardized sonographic descriptors. If you can narrate a lesion's shape, margin and posterior features fluently, the selection and evaluation questions become much easier.
Procedures: Breast Imaging and Intervention Knowledge
Procedures holds 64 scored questions. This domain tests the clinical workflow around breast sonography: how examinations are performed, how findings are correlated, and how image-guided procedures are supported. Because the clinical-experience requirement includes 20 approved elective procedures, the exam expects you to understand procedural context, not just diagnostic scanning.
Procedures: What to Master
Study this domain as a workflow from referral to documentation.
- Standard scanning technique, patient positioning and systematic coverage of the breast and axilla
- Correlation with mammography and other imaging, and how that affects what you scan and document
- Breast anatomy and its sonographic appearance across different tissue types and patient populations
- Common benign and malignant sonographic patterns and the vocabulary used to report them
- Image-guided procedure support: preparation, sterile technique, needle visualization and post-procedure care
- Special situations such as implants, postsurgical changes, pregnancy and lactation, and male breast imaging
Candidates often underprepare for the correlation and special-situation topics because day-to-day scanning lets you lean on the radiologist. On the exam, nobody is behind you. Practice stating what you would scan, what you would document and why.
Patient Care: Small Domain, Easy Points to Lose
Patient Care contains only 16 scored questions, the smallest slice. That makes it tempting to ignore, but these questions reward basic preparation and are among the easiest to get right if you have reviewed them.
Patient Care: Core Topics
Expect scenario-based questions grounded in ordinary clinical practice.
- Patient identification, informed communication and consent considerations
- Infection control and standard precautions, especially around procedures
- Patient comfort, privacy and sensitive communication during breast examinations
- Recognizing and responding to patient emergencies or adverse reactions
- Professional ethics, confidentiality and appropriate escalation to the radiologist
Because the ARRT ethics standards are also an eligibility requirement, you should already be familiar with the profession's expectations. Use that familiarity here and secure the points quickly.
A Study Sequence Built Around the Blueprint
Generic schedules ignore the blueprint. This sequence is organized by scored-question allocation and by how topics build on one another: physics before image formation, image formation before image evaluation, and clinical procedures after you can read the images. Adjust the length to your timeline, but keep the order.
Physics and Basic Principles
- Work through the Basic Principles of Ultrasound subcategory (32 questions)
- Focus on resolution, attenuation and transducer behavior, since later topics depend on them
- Download the official content specifications and mark each listed task you cannot yet explain
Image Formation and Artifacts
- Cover the machine controls and processing features behind the 37 Image Formation questions
- Build an artifact library: cause, appearance and diagnostic meaning for each
- Do daily image-based drills so recognition becomes automatic
Image Evaluation and Selection
- Practice lesion description with standardized sonographic terminology
- Review what makes an image representative and what documentation supports interpretation
- Take a timed Image Production set and review every miss
Procedures and Patient Care
- Study technique, correlation, special situations and procedure support (64 questions)
- Quickly cover the 16 Patient Care questions, then revisit them in the final week
- Connect each topic to cases from your own clinical log
Full-Length Simulation
- Sit a full-length practice session under timed conditions to build stamina for 225 minutes
- Re-drill your weakest subcategory, then stop cramming the day before
- Skim a condensed reference such as the RTBS cheat sheet
Spaced review fits naturally into this sequence: revisit earlier weeks' weak areas briefly at the start of each new week rather than leaving them behind. Use realistic practice questions in each phase, and prioritize explanations over scores. A missed question you understand is more valuable than a correct guess. If you want a broader view of prep resources, the RTBS training page is a good companion.
Fees, Attempts and What Comes After You Pass
What the exam costs
| Item | Amount |
|---|---|
| Application/exam fee | $225 USD |
| Application/exam fee using an ARDMS supporting credential | $450 USD |
| Reapplication | $200 USD |
| Annual ARRT registration renewal | $65 USD, regardless of how many ARRT credentials you hold |
If your supporting credential comes through ARDMS rather than ARRT, budget for the higher fee. Confirm current figures on ARRT's fee page before paying, since fee schedules can change. A full breakdown is in RTBS certification cost: complete pricing breakdown.
Attempt limits
You are permitted three examination attempts within three years before requalification is required. This is not three attempts per year. A rushed first attempt does not just cost you a $200 reapplication fee; it spends one of a limited set of tries. If your practice results are still unstable, it is usually smarter to move your date than to gamble. Scheduling details are covered in RTBS exam dates: testing windows, deadlines and scheduling.
Staying certified
- Annual registration renewal costs $65.
- Ordinarily 24 approved continuing education credits are required per two-year biennium.
- Credentials earned on or after January 1, 2011 require Continuing Qualifications Requirements (CQR) every ten years.
If you are weighing the investment, is the RTBS certification worth it and the RTBS salary guide look at the career side, and RTBS jobs covers where the credential tends to be valued, such as breast imaging centers, hospital radiology departments and outpatient women's health practices.
Test-Day Mechanics for the 225-Minute Session
Arrive early and plan for a 245-minute appointment, even though your question time is 225 minutes. With 225 questions in 225 minutes, you have roughly one minute per item on average. Image and video items may take longer than straightforward recall questions, so bank time on quick questions rather than rushing everything evenly.
- Answer every question. Do not leave blanks; unanswered items cannot earn credit.
- Flag and move on. If an image item stalls you, mark it and return after finishing the rest.
- Read for the qualifier. Words like "best," "first" and "most likely" matter in one-best-answer items.
- Use the calculator tools correctly. No personal calculator is allowed, so rely on the test-center-supplied or on-screen option and practice with a basic calculator beforehand.
- Do not hunt for pilots. You cannot identify the 40 unscored items, so give each question full effort.
Frequently Asked Questions
The exam has 225 questions in total. Of those, 185 are scored and 40 are unscored pilot questions. You cannot tell which are which, so treat every question as if it counts.
The 185 scored questions are allocated as Patient Care 16, Image Production 105 and Procedures 64. Image Production is the largest domain and includes subcategories for Basic Principles of Ultrasound (32), Image Formation (37) and Evaluation and Selection of Representative Images (36).
No. The passing score is 75 on a 1-99 scaled-score system, not 75% of questions answered correctly. The raw-score equivalent depends on the specific exam form, so there is no single raw cutoff to memorize.
You are permitted three examination attempts within three years before requalification is required. It is three attempts across that period, not three per year, so it pays to be well prepared for your first sitting.
You need a qualifying supporting credential (Radiography plus Mammography, Sonography, or Vascular Sonography), ARRT ethics compliance, 16 structured-education hours within the prior 24 months, and documented clinical experience of 200 nonsimulated breast exams plus 20 approved elective procedures within the qualifying window.
Preparing for RTBS rewards candidates who study the blueprint rather than the topic in general. Put the most hours into Image Production, connect Procedures to the cases you scan, and secure the Patient Care points efficiently. Start with a diagnostic on our practice test site, and revisit the RTBS study guide as you refine your plan.