What Is RTM Certification?

What the RTM Credential Actually Is

On this site, RTM stands for Registered Technologist - Mammography. It is the shorthand we use for the mammography credential awarded by the American Registry of Radiologic Technologists (ARRT). Strictly speaking, ARRT's official discipline name is Mammography (M), and "RTM" is the abbreviation this site assigns to it. If you see the same letters elsewhere in the professional world, they may refer to unrelated credentials, so it is worth confirming the issuer before you rely on any outside fee, date, or pass-rate claim. For a broader orientation, see our overview pages What Is RTM? and What Does RTM Stand For?.

The credential is a postprimary certification. That word matters. You cannot start your radiologic technology career with it. You earn it on top of an existing ARRT Radiography certification and registration, which signals to employers that you have added dedicated, verified competence in breast imaging to your foundation as a radiographer.

Who Issues It and How the Exam Is Delivered

ARRT sets the standards, defines the content specifications, and awards the credential. The examination itself is delivered at Pearson VUE test centers. You apply to ARRT, receive eligibility, and then schedule your appointment through the testing provider. If you are mapping out timing, our guide to RTM exam dates and scheduling walks through how the windows work.

The governing blueprint is the Mammography Examination Content Specifications, board approved in July 2024 and effective September 1, 2025. That document, not a textbook table of contents, defines what can appear on your exam. Everything in the sections below about categories and question counts comes from that blueprint.

Postprimary Eligibility: The Gate Before the Exam

To be eligible, you must satisfy three groups of requirements, and all three have to line up inside a defined time window.

The structured-education piece has a subtle trap: it is not enough to hit 16 total hours. You need at least one credit in each major content category, so a candidate who loaded all their hours into positioning coursework could still fall short. For a deeper walk-through of qualifying, read RTM Requirements: Eligibility, Prerequisites & How to Qualify.

The Clinical Experience Portfolio

The clinical requirement is where this credential differs most from a typical exam-only certification. Candidates must document real, supervised mammography work. The requirements include:

• MQSA compliance before you perform any procedure that will count toward your totals.
• Independent mammographic imaging of 75 patients, with no phantom or simulated substitutions.
• All nine prescribed quality-control activities, each completed 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 Catch Candidates Off Guard

ARRT caps documentation so that experience cannot be rushed in a few marathon days. You may log a maximum of 16 mammographic procedures per day across mammograms, QC, image evaluation, and electives combined. QC documentation is further limited to one submission per day per test. In practice, that means repeating a QC activity many times requires many separate days, so start your QC log early rather than saving it for last.

You must be physically present for the examinations and procedures you record. Your qualified clinical verifier does not have to stand over your shoulder, however, and may verify remotely. For image evaluation specifically, the issuer permits a HIPAA-compliant virtual meeting with a remote interpreting physician while you review the same images on a local monitor, though in-person review is recommended.

Exam Format and Scoring Mechanics

The exam is computer-based and closed book. Here is how the structure breaks down:

Question Styles

Most items are single-best-answer multiple choice, but expect possible alternative formats and image-based questions. The ARRT handbook also describes multiple-response and ordered-response formats, so do not assume every item has exactly one correct selection. Image-based items matter in a discipline built on projections and image quality, so practice interpreting what a displayed image tells you rather than only recalling text facts.

Navigation and Tools

You must answer each item before advancing, but you can flag questions and return to them. Basic and scientific on-screen calculators are available, and Pearson can supply a basic four-function calculator on request. Personal calculators are prohibited.

What "75" Really Means

The passing score is 75 on ARRT's 1-99 scaled-score range. It is not 75% correct. Scaling accounts for differences in difficulty across exam forms, so a given number of right answers does not translate into a fixed percentage. Our dedicated page on the RTM passing score explains how to interpret your result. Also remember that 30 of the 145 questions are unscored pilot items you cannot identify, so treat every question as if it counts.

The Three Content Categories

The blueprint organizes the exam into three official major content categories. The issuer specifies scored-question allocations as counts, and we present them that way rather than converting them into unofficial percentages.

Because Procedures is so heavily weighted, a weakness there is very hard to offset elsewhere. For a topic-by-topic breakdown, see RTM Exam Domains: Complete Guide to All 3 Content Areas.

Reading the Pass-Rate Data Correctly

Pass-rate figures are easy to misquote because they describe different groups. The ARRT Annual Exam Report for 2025 offers two distinct numbers:

• The full-year first-attempt summary reports 91% passing (rounded) among 1,865 candidates, and it 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 are not interchangeable. The 90.3% figure is not the full-calendar-year rate, and the two percentages describe different cohorts. Neither number is a guarantee about your result, and both reflect a candidate pool that has already cleared a demanding eligibility process. To dig into interpretation, read RTM Pass Rate: What the Data Shows and How Hard Is the RTM Exam?.

Fees, Attempts, and the Registration Clock

The published costs are straightforward:

• Initial application: $225 USD
• Examination reapplication: $200 USD

You have three examination attempts within three years of the opening of your initial examination window. That three-year clock starts running at the opening of the window, so a failed attempt does not pause it. If you need to retake, plan your clinical and review time so you are not forced to rush a final attempt near the deadline. For a complete cost picture, including items beyond the exam fee, see RTM Certification Cost: Complete Pricing Breakdown.

Keeping the Credential Active

Passing the exam is not the finish line. To maintain certification and registration you must:

• Renew annually. The renewal fee is $65 regardless of how many ARRT credentials you hold.
• Stay in continuing compliance 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.

Where the Credential Fits in Your Career

Mammography credentials are most relevant where breast imaging is a daily service: hospital breast centers, outpatient imaging facilities, dedicated screening programs, and mobile screening units. Because MQSA requirements shape how facilities staff their mammography services, employers who run these programs have a direct reason to value technologists who can document verified, MQSA-compliant experience. For a look at what roles may be open to you, see RTM Jobs, and for earnings context, review the RTM Salary Guide. If you are weighing the investment of time and fees, Is the RTM Certification Worth It? lays out the tradeoffs without guessing at numbers.

Sequencing Your Preparation Around the Blueprint

Because the clinical portfolio and the exam content overlap, the smartest approach is to let your clinical work feed your studying rather than treating them as separate projects. Here is one RTM-specific way to organize the final stretch before test day.

The logic is simple: Procedures holds the most scored questions, so it earns the earliest and longest blocks of time. For a full plan with resources, see the RTM Study Guide, and keep the RTM Cheat Sheet handy for last-minute review. When you are ready to test yourself under realistic conditions, our RTM practice tests mirror the three-category structure so you can see which areas need more work.

Frequently Asked Questions