- What "RTM" Means Here
- Who Issues the Credential and How It Is Earned
- Who Can Sit for It
- The Clinical Experience Behind the Credential
- What the Exam Looks Like
- The Three Content Categories
- Scoring and Pass-Rate Data
- Fees, Renewal and Ongoing Requirements
- Where It Fits in a Career
- Scheduling Your Prep Around the Blueprint
- Frequently Asked Questions
- RTM here means Registered Technologist - Mammography, an ARRT postprimary credential in the Mammography (M) discipline.
- The exam has 145 questions: 115 scored, 30 unscored pilot, with 150 minutes of answering time.
- Procedures is the largest category at 65 of 115 scored questions.
- A passing score is 75 on a 1-99 scaled range, not 75% correct.
What "RTM" Means Here
On this site, RTM stands for Registered Technologist - Mammography. It refers to the mammography credential that radiologic technologists earn through the American Registry of Radiologic Technologists (ARRT). Officially, ARRT's discipline is called Mammography (M); "RTM" is the abbreviation this site uses for the credential holder and the exam. If you are searching for the meaning of the acronym because you saw it on a job posting or a colleague's badge, this is the context to carry with you: a radiologic technologist who has added mammography to an existing ARRT credential.
If you want other short explainers on the same term, see What Is RTM?, What Does RTM Stand For? and RTM Meaning. This article goes deeper into how the credential works, what it demands and how candidates typically approach it.
Who Issues the Credential and How It Is Earned
The credential is issued by ARRT. Mammography is one of ARRT's postprimary disciplines, meaning you pursue it after you already hold a primary pathway credential. That structure explains why the requirements read differently from a first-time certification: ARRT assumes you already understand radiation safety, general patient care and radiographic fundamentals, and it tests whether you can apply them to breast imaging specifically.
Candidates apply through ARRT and test at Pearson VUE test centers. The full set of prerequisites, fees and deadlines lives in ARRT's postprimary handbook, and we summarize the essentials below. For a dedicated walkthrough, see RTM Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Can Sit for It
Postprimary eligibility for Mammography rests on four pillars:
- Current ARRT certification and registration in Radiography. You must be in good standing with the primary credential.
- Compliance with ARRT ethics requirements. Ethics review applies to postprimary applicants just as it does to everyone else.
- 16 hours of structured education completed within the 24 months before you apply, with at least one credit in each major content category.
- Verified clinical experience completed within the corresponding 24-month eligibility window.
Notice the timing language. Both the education and the clinical work are tied to a 24-month window, so candidates who gather credits and procedures sporadically over several years can find that older items no longer count. Plan the education and the clinical log as a single project with a start date, not as two unrelated chores.
The Clinical Experience Behind the Credential
This is the part of the process that separates mammography from many other credentials. You do not just pass an exam; you document hands-on work. The clinical requirements for the Mammography credential include:
Clinical Requirements at a Glance
- MQSA compliance before you perform any procedure that will count toward your requirements.
- Independent mammographic imaging of 75 patients, with no phantom or simulated substitutions.
- All nine prescribed quality-control activities, each at its required repetition count.
- Review of at least 10 mammography cases with an MQSA-qualified interpreting physician.
- At least five elective procedures, completed through observation, assistance or participation.
Logging rules that trip people up
- A maximum of 16 mammographic procedures may be logged per day across mammograms, QC, image evaluation and electives.
- QC documentation is limited to one submission per day per test, so you cannot batch-log repeated tests from a single session.
- You must be physically present for the examinations and procedures you log.
- Your clinical verifier does not need to directly observe your work and may verify remotely.
- For image evaluation, ARRT permits a HIPAA-compliant virtual meeting with a remote interpreting physician, provided you review the same images on a local monitor. In-person review is recommended.
What the Exam Looks Like
The Mammography exam is computer-based and delivered at Pearson VUE. Key format facts:
| Feature | Detail |
|---|---|
| Total questions | 145 (115 scored, 30 unscored pilot) |
| Examination answering time | 150 minutes |
| Total appointment time | 170 minutes, including tutorial, nondisclosure agreement and survey |
| Primary item type | Single-best-answer multiple choice |
| Other possible formats | Alternative item formats, image-based questions, multiple-response and ordered-response items |
| Reference materials | Closed book |
| Calculator | Basic and scientific on-screen calculators available; Pearson can supply a basic four-function calculator on request; personal calculators prohibited |
| Navigation | Each item must be answered before advancing; answers can be flagged and revisited |
Two details deserve attention. First, the 30 unscored pilot questions are indistinguishable from scored ones, so you must treat every item as if it counts. Second, because you must answer each item before moving forward, your pacing strategy should rely on flagging rather than skipping. Make a best choice, flag it, and return if time allows.
For a candid look at what candidates find challenging, read How Hard Is the RTM Exam? Complete Difficulty Guide 2026.
The Three Content Categories
The exam blueprint is published in ARRT's Mammography Examination Content Specifications (board approved July 2024, effective September 1, 2025). It divides the 115 scored questions into three major categories. These are examination content categories, not study-course headings.
| Domain | Scored Questions (of 115) |
|---|---|
| Domain 1: Patient Care | 20 |
| Domain 2: Image Production | 30 |
| Domain 3: Procedures | 65 |
Domain 1: Patient Care (20 questions)
The smallest category, but not one to neglect. Expect questions about interacting with patients during an examination that can be physically and emotionally sensitive, safety and infection control in the mammography suite, and the professional responsibilities that come with performing a screening and diagnostic service.
- Communication and patient comfort during compression
- Safety, infection control and ethical practice
- Understanding your role relative to the interpreting physician
Domain 2: Image Production (30 questions)
This category covers the technical side of creating a diagnostic mammographic image and keeping the equipment and process under control.
- Image acquisition factors and image quality evaluation
- Quality control activities and what each one is designed to detect
- Recognizing technical problems and knowing how to correct them
Domain 3: Procedures (65 questions)
The dominant category, and the one that should absorb the majority of your preparation time. ARRT's allocation splits it into Anatomy, Physiology, and Pathology (26 questions) and Mammographic Positioning and Procedures (39 questions).
- Breast anatomy, physiology and common pathology as they relate to imaging
- Standard and supplemental positioning and what each view is meant to demonstrate
- Procedural knowledge that goes beyond routine screening views
We present the allocations as question counts rather than percentages because that is how the issuer specifies them. For a section-by-section breakdown, see RTM Exam Domains 2026: Complete Guide to All 3 Content Areas.
Scoring and Pass-Rate Data
ARRT reports results on a scaled score range of 1-99, and the passing score is 75. That is a scaled score, not 75% correct. Different forms of the exam can vary slightly in difficulty, and scaling keeps the standard consistent. Our page on the RTM passing score covers how to read a score report.
Candidates have three examination attempts within three years of the opening of the initial examination window.
What the 2025 report says
ARRT's Annual Exam Report for 2025 offers two figures that are easy to confuse:
- The full-year first-attempt summary reports 91% passing (rounded) among 1,865 candidates, and spans the September blueprint change.
- The revised-exam first-time cohort for September 1 through December 31, 2025 had a 90.3% pass rate (n = 567).
These describe different cohorts. The 90.3% figure is not the full-calendar-year rate. Both numbers suggest that well-prepared candidates generally do well, which is consistent with a population that has already passed one ARRT exam and completed supervised clinical work. Still, pass rates describe a group, not you, so treat them as context rather than a guarantee. More detail is on RTM Pass Rate 2026: What the Data Shows.
Fees, Renewal and Ongoing Requirements
Application and exam fees
- Initial application: $225 USD
- Examination reapplication: $200 USD
For the total picture, including how fees interact with education and renewal costs, see RTM Certification Cost 2026: Complete Pricing Breakdown.
Keeping the credential active
Earning the credential is not the end of the paperwork. To maintain certification and registration you must:
- Renew annually for $65, regardless of how many ARRT credentials you hold.
- Continue complying with ARRT ethics requirements.
- Complete 24 approved CE credits per two-year biennium. This is per biennium, not per credential, so holding both Radiography and Mammography does not double the requirement.
Credentials earned on or after January 1, 2011 also carry Continuing Qualifications Requirements (CQR) every 10 years. CQR involves a professional profile, a structured self-assessment and any prescribed CE. ARRT also lets you accept the maximum CQR CE prescription instead of taking the self-assessment.
Key Takeaway
The $65 renewal fee and the 24-credit CE requirement are shared across all your ARRT credentials. Adding Mammography increases your documentation workload for the clinical portion up front, but it does not multiply your annual renewal cost or your biennial CE obligation.
Where It Fits in a Career
Mammography technologists work wherever breast imaging is performed. Typical employers include hospital imaging departments, outpatient imaging centers, breast centers and clinics offering screening and diagnostic mammography. Because mammography facilities operate under the Mammography Quality Standards Act (MQSA), employers care a great deal about documented qualifications, and a recognized postprimary credential is a clear signal of that.
For a look at openings and the kinds of roles that ask for it, see RTM Jobs. If you are weighing whether the investment of time and clinical effort makes sense, Is the RTM Certification Worth It? Complete ROI Analysis 2026 lays out the tradeoffs, and RTM Salary Guide 2026: Complete Earnings Analysis addresses compensation. We do not quote salary numbers here because they vary by region, facility type and experience.
Scheduling Your Prep Around the Blueprint
You do not need an elaborate methodology. You need to match your calendar to the blueprint. Because Procedures accounts for 65 of 115 scored questions, it should receive the most hours and the earliest start. A sensible ordering looks like this:
Procedures: Anatomy, Physiology and Pathology
- Breast anatomy and tissue characteristics
- Pathology as it appears on images
- Build flashcards for terms you will reuse in positioning review
Procedures: Positioning and Procedures
- Standard views and what each demonstrates
- Supplemental and problem-solving views
- Pair every view with the error you would see if it were done wrong
Image Production
- Image quality evaluation and technical factors
- The nine QC activities and the purpose of each
Patient Care and Review
- Communication, safety and ethics
- Timed mixed practice to rehearse flagging and pacing
Your clinical log gives you a head start on Image Production, since you will be performing the QC activities for real. Use that experience, but do not assume it covers everything; the exam may ask about the reasoning behind a test, not just the steps. For a fuller plan, see the RTM Study Guide 2026: How to Pass on Your First Attempt, and keep the RTM Cheat Sheet 2026 handy for last-week review. When you are ready to test yourself under realistic conditions, try the RTM practice test.
Frequently Asked Questions
In this context, RTM refers to Registered Technologist - Mammography, a postprimary credential in ARRT's Mammography (M) discipline. It is earned by radiologic technologists who already hold ARRT Radiography certification and who complete structured education, documented clinical experience and an exam.
Yes. Postprimary eligibility requires current ARRT certification and registration in Radiography, along with compliance with ARRT ethics requirements. You then complete 16 hours of structured education and verified clinical experience within the corresponding 24-month windows.
The exam has 145 questions, of which 115 are scored and 30 are unscored pilot items. You get 150 minutes of examination answering time within a 170-minute appointment that also covers the tutorial, nondisclosure agreement and survey.
No. ARRT uses a scaled score range of 1-99, and 75 is the passing scaled score. It does not translate directly into a percentage of questions answered correctly.
You may reapply for the exam for $200. Candidates have three examination attempts within three years of the opening of the initial examination window, so plan your retake around your remaining time as well as your study needs.