RTT Training

What "RTT Training" Actually Covers

On this site, RTT refers to the Registered Technologist - Radiation Therapy credential, awarded by the American Registry of Radiologic Technologists (ARRT) in the Radiation Therapy (T) discipline through the primary pathway. When people search for "RTT training," they usually mean one of three things: the formal education you must complete to become eligible, the clinical competencies you must document, or the exam preparation you do in the months before your test date. This article covers all three, because they are tightly linked. Your program shapes what you know; the exam content specifications tell you how that knowledge will be tested.

If you are still orienting yourself to the credential, the overview at What Is RTT Certification? explains the basics. If you already know the credential and want a structured prep plan, pair this article with the RTT Study Guide 2026.

The Education Pathway: Degree Plus a Verified Program

Primary eligibility has three pillars. First, you need an associate degree or higher from an ARRT-recognized accredited institution. The degree can be in any major, but it must be conferred before you take the examination. Second, you must complete an ARRT-verified radiation therapy educational program, including its didactic coursework and clinical competencies. Third, you must comply with ARRT's ethics requirements, which are reviewed as part of the application.

Two points trip up candidates regularly:

• Radiography is not a universal prerequisite. An existing Radiography credential is not required across the board. Radiation therapy is earned through the primary pathway, not as a Radiography postprimary examination.
• Two separate clocks are running. The degree must be earned and the application submitted no more than three years after program completion. That initial application deadline is separate from the three-year window in which you may use your exam attempts.

For a fuller walkthrough of eligibility language, see RTT Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Clinical Competency: What You Must Perform and Document

The clinical side of training is where this credential differs most from generic allied-health exams. The ARRT Radiation Therapy Didactic and Clinical Competency Requirements specify exactly what you must demonstrate, and the program director or designee must verify each competency through in-person direct observation. Remote or virtual observation is not accepted.

Notice how the list maps onto the exam. Simulation, dose calculation, accessory devices, and treatment delivery all feed directly into the Procedures domain, which is the largest on the exam. Quality-control activities connect to the Safety domain, and patient-care activities connect to Patient Care. Treat each competency sign-off as rehearsal for the corresponding exam content, not as paperwork to finish and forget.

How the Exam Is Built and Delivered

The exam is delivered at Pearson VUE test centers. Understanding its mechanics lets you train under realistic conditions.

Because you cannot skip an item, pacing matters. Practice committing to a best answer, flagging it, and moving on. Because personal calculators are prohibited, train with the on-screen calculators during dose-calculation practice rather than a handheld device you will not have on test day.

The 30 unscored pilot questions are indistinguishable from scored ones, so give every item full effort. For more on how the score is derived, read RTT Passing Score 2026: Exactly What You Need to Pass.

Training Content by Exam Domain

The exam is organized into three official major content categories. The scored-question allocations below come from the Radiation Therapy Examination Content Specifications (effective January 1, 2022), which control examinations through January 31, 2027. These are counts out of 200 scored questions; do not convert them into invented percentages.

Procedures alone accounts for 103 of the 200 scored questions, a little over half of the scored exam. Any training plan that treats the three domains as equal weight will under-invest where the points are. A detailed breakdown lives in RTT Exam Domains 2026: Complete Guide to All 3 Content Areas.

Sequencing Your Final Review Around the Domains

Once your program is finished and your clinical competencies are signed off, final review is about ordering. Here is one way to sequence an eight-week review using the actual domain weights rather than a generic template.

Safety comes first because physics and radiobiology concepts reappear inside Procedures questions about dose and fractionation. Patient Care is scheduled shorter because it carries 46 scored questions and generally builds on clinical experience you already have. Adjust to your own weak spots, but keep Procedures as the centerpiece. For a quick-reference companion during review, use the RTT Cheat Sheet 2026, and practice under realistic conditions with the RTT practice tests.

Application, Fees, and Attempt Limits

Budgeting is part of training. The initial application fee is $225 USD, and the examination reapplication fee is $200 USD. You have three examination attempts within three years of the opening of your initial examination window, so a failed attempt is not the end, but it does start a clock on the remaining ones. A revised examination cut-score standard took effect February 1, 2025, while the reported passing score remains 75 scaled.

For the 2025 testing year, ARRT's Annual Exam Report lists a first-time candidate pass rate of 77.1% (n=958). That figure describes first-time candidates only and says nothing about how you will personally perform, but it is a useful reminder that most prepared candidates pass on the first try. Context on the number is in RTT Pass Rate 2026: What the Data Shows, and a complete cost picture is in RTT Certification Cost 2026: Complete Pricing Breakdown. When you are ready to schedule, RTT Exam Dates 2026 covers windows and deadlines.

After You Pass: Renewal, CE, and Ongoing Qualification

Training does not stop at certification. To maintain both certification and registration, you renew annually at $65 regardless of how many ARRT credentials you hold, stay in compliance with ethics requirements, and earn 24 approved continuing education credits per two-year biennium (the 24 credits are per biennium, not per credential).

Because credentials earned on or after January 1, 2011 also carry Continuing Qualifications Requirements, you will complete a CQR cycle every 10 years. It involves a professional profile, a structured self-assessment, and any prescribed CE. ARRT also permits accepting the maximum CQR CE prescription instead of taking the self-assessment.

Where Trained Radiation Therapists Work

Radiation therapists deliver treatment under the direction of radiation oncologists, working alongside medical physicists and dosimetrists. Typical employers include hospital-based cancer centers, freestanding radiation oncology clinics, academic medical centers, and cancer treatment networks. The competencies you document in training, from simulation to accessory-device fabrication to treatment delivery, mirror daily responsibilities in these settings. Explore openings and role types in RTT Jobs, review earnings in the RTT Salary Guide 2026, and weigh the investment using Is the RTT Certification Worth It?.

If the exam's difficulty is your main worry, How Hard Is the RTT Exam? breaks down where candidates tend to struggle, and the main practice test site lets you rehearse the format directly.

Frequently Asked Questions