- What "RTN Training" Actually Means
- The Degree and the ARRT-Verified Program
- Clinical Competencies: The Hands-On Core
- Training Mapped to the Exam Blueprint
- Inside the Procedures Category
- Item Formats, Calculators and Test-Day Mechanics
- A Domain-Ordered Study Timeline
- Timelines, Fees and Staying Certified
- Frequently Asked Questions
- RTN training means an ARRT-verified nuclear medicine program plus an associate degree or higher conferred before you sit the exam.
- Clinical sign-off requires 8 patient-care activities, 5 quality-control activities and 25 procedures, with at most 5 procedures simulated.
- Procedures carries 118 of 200 scored questions, so most of your training review belongs there.
- A scaled score of 75 passes; it is not 75% correct.
What "RTN Training" Actually Means
On this site, RTN refers to the Registered Technologist - Nuclear Medicine Technology credential, earned through the American Registry of Radiologic Technologists (ARRT) in the Nuclear Medicine Technology (N) discipline. It is the ARRT route, which is separate from the NMTCB's CNMT credential. If you want the background on the name itself, see What Is RTN? and What Does RTN Stand For?.
"Training" for this credential is not a weekend course or a bootcamp. It is a structured educational pathway with three layers:
- Academic education: an associate degree or higher from an ARRT-recognized accredited institution.
- Program education: completion of an ARRT-verified nuclear medicine technology educational program, including its didactic and clinical competency requirements.
- Exam preparation: focused review against the ARRT content specifications before you sit the Pearson VUE exam.
Exam prep is the final layer, not a substitute for the first two. The full eligibility picture lives in RTN Requirements 2026; this article concentrates on how the training itself is built and how to use it to prepare.
The Degree and the ARRT-Verified Program
The degree rule
The primary pathway requires an associate degree or higher, and the degree can be in any major. What matters is timing and accreditation: the degree must be conferred before you take the examination, and it must come from an ARRT-recognized accredited institution. A candidate who finishes every clinical competency but has not yet had the degree conferred cannot sit the exam.
The program requirement
Separately from the degree, you must complete a nuclear medicine technology educational program that ARRT verifies. That program carries the didactic coursework and the clinical competency requirements described in ARRT's Nuclear Medicine Technology Didactic and Clinical Competency Requirements document. Treat that document as your syllabus of record, because it defines what your program must demonstrate you can do.
Ethics compliance
Training is not only technical. Candidates must comply with ARRT ethics requirements to be eligible, and that compliance continues for as long as you hold the credential. Read the ethics standards early in your program rather than at application time.
Clinical Competencies: The Hands-On Core
The clinical component is where nuclear medicine training differs most from a generic allied-health exam track. ARRT specifies the competencies, and your program director or designee verifies them.
| Competency Group | Requirement |
|---|---|
| General patient-care activities | Eight activities, including CPR certification |
| Quality-control activities | Five activities |
| Diagnostic/therapeutic procedures | 25 different procedures, with no more than five simulated |
| Verification method | In-person direct observation by the program director or designee |
What the simulation limit means in practice
Up to five of the 25 procedures may be simulated, which leaves at least 20 that must be performed on real patients under observation. If your clinical site has a limited case mix, plan rotations early so you are not hunting for a rare study in your final semester.
Direct observation is in person
Remote or virtual observation is not accepted for competency verification. This matters if your program uses satellite sites or if you are tempted to treat a recorded demonstration as sign-off. Confirm with your program director how each competency will be observed and documented.
Training Mapped to the Exam Blueprint
Examinations through January 31, 2027 are governed by the Nuclear Medicine Technology Examination Content Specifications (V.2021.02.24, effective January 1, 2022). A separate 2027 specification takes effect February 1, 2027, and this article does not blend the two. If your exam date falls after that cutoff, check which specification applies before you build your review plan, and see RTN Exam Dates 2026 for scheduling context.
The exam has four official content categories. These are examination categories, not chapter titles in your textbook, so your coursework will not map to them one-to-one.
| Content Category | Scored Questions (of 200) |
|---|---|
| Patient Care | 24 |
| Safety | 25 |
| Image Production | 33 |
| Procedures | 118 |
These are question counts, not official percentages. The exam also includes 30 unscored pilot questions, for 230 total, and you cannot tell which items are pilots, so treat every question as if it counts. For a deeper walk through each area, read RTN Exam Domains 2026.
Patient Care (24 questions)
Training here overlaps heavily with your eight clinical patient-care activities.
- Patient identification, communication and preparation for nuclear studies
- Assessing patient condition, handling emergencies, and infection control
- Documentation and ethical conduct in a clinical setting
Safety (25 questions)
Radiation protection is the thread running through this category, and the exam uses both SI and conventional units.
- Fluency converting between SI and conventional radiation units
- Time, distance and shielding principles; handling and storing radioactive materials
- Waste management, contamination response and spill procedures
Image Production (33 questions)
Instrumentation and acquisition knowledge, including the limited CT role in nuclear medicine.
- Gamma camera, SPECT and PET performance and quality control
- Acquisition parameters, processing and artifact recognition
- CT content limited to attenuation correction and anatomic localization, not diagnostic CT
Your five quality-control clinical activities are excellent preparation for the Image Production category, since daily and periodic QC is exactly the kind of practical knowledge the exam probes.
Inside the Procedures Category
Procedures is the largest category at 118 of 200 scored questions, which is well over half the exam. Its subcategories are published with their own question counts, and they should drive how you allocate review time.
| Procedures Subcategory | Scored Questions |
|---|---|
| Radionuclides and Radiopharmaceuticals | 28 |
| Cardiac Procedures | 25 |
| Endocrine and Oncology Procedures | 25 |
| Gastrointestinal and Genitourinary Procedures | 18 |
| Other Imaging Procedures | 22 |
Radionuclides and Radiopharmaceuticals (28)
The single biggest subcategory, and it underpins every other procedure.
- Radiopharmaceutical characteristics, preparation, quality control and administration
- Generator systems, decay concepts and dose calculation
- Therapeutic versus diagnostic agents and associated precautions
Cardiac Procedures (25)
Cardiac studies combine physiology, pharmacology and protocol detail.
- Stress and rest myocardial perfusion protocols and patient preparation
- Stress agents and monitoring responsibilities
- Other cardiac studies and their indications
Endocrine and Oncology Procedures (25)
Thyroid and tumor imaging, plus the radiopharmaceuticals specific to each.
- Thyroid uptake and imaging, parathyroid and related endocrine studies
- Oncologic imaging, including PET-based applications
- Patient preparation and interfering medications or conditions
Gastrointestinal and Genitourinary Procedures (18)
Smaller in weight but dense with protocol-specific detail.
- GI motility, bleeding and hepatobiliary studies
- Renal imaging and function studies
- Study timing, patient preparation and interventions
Other Imaging Procedures (22)
The remaining diagnostic studies not covered above.
- Skeletal, pulmonary, neurologic and infection or inflammation imaging
- Protocol selection and common artifacts for each study
Because of this weighting, a candidate who feels comfortable with Safety and Patient Care but shaky on cardiac and radiopharmacy content is carrying the most risk. For a sense of how this distribution shapes difficulty, see How Hard Is the RTN Exam?.
Item Formats, Calculators and Test-Day Mechanics
The exam is computer-based and delivered at Pearson VUE test centers. Questions are primarily single-best-answer multiple choice, but the ARRT handbook also describes alternative formats, including multiple-response and ordered-response items, and image-based questions may appear. Train with all of these in mind, especially ordered-response items, which reward knowing a sequence (for example, the steps of a protocol) rather than recognizing a single fact.
- Length: 230 questions (200 scored, 30 unscored pilot), with 230 minutes of answering time and 250 minutes for the full appointment including the tutorial, nondisclosure agreement and survey.
- Closed book: no reference materials.
- Calculators: basic and scientific on-screen calculators are provided; Pearson can supply a basic four-function calculator on request. Personal calculators are prohibited.
- Navigation: you must answer each item before advancing, but you can flag items and revisit them.
Key Takeaway
Practice dose, decay and unit-conversion problems using only an on-screen calculator. Since you cannot bring your own device, get comfortable with the interface before test day so arithmetic does not eat into your time.
Scoring in plain terms
The passing score is 75 on ARRT's 1-99 scaled-score range. It is not 75% correct. A revised cut-score standard took effect February 1, 2025, while the reported passing score stays at 75 scaled. For the detail, see RTN Passing Score 2026. For context on outcomes, ARRT's Annual Exam Report for 2025 lists a 64.7% first-time pass rate among 439 first-time candidates; the RTN Pass Rate 2026 article discusses what that figure does and does not tell you.
A Domain-Ordered Study Timeline
Because Procedures dominates the blueprint and Radionuclides and Radiopharmaceuticals underpins it, sequence your final review accordingly. This is a sample outline for the weeks after your coursework, not a substitute for your program; adapt it to your own gaps. A broader plan appears in the RTN Study Guide 2026.
Radiopharmacy and Safety foundations
- Radionuclide properties, generators, dose calculations and unit conversions
- Radiation protection principles, spill and contamination response
Procedures, subcategory by subcategory
- Cardiac, then Endocrine and Oncology, since each carries 25 questions
- Gastrointestinal/Genitourinary and Other Imaging protocols
Image Production and Patient Care
- Instrumentation, QC, artifacts and the CT attenuation-correction role
- Patient assessment, emergencies and ethics
Mixed practice and weak-spot repair
- Timed mixed sets across all four categories, including image-based and ordered-response items
- Reread any procedure where you missed protocol steps
For a compact last-minute reference, the RTN Cheat Sheet 2026 condenses must-know facts, and you can pressure-test yourself on the RTN practice test as your exam date approaches.
Timelines, Fees and Staying Certified
Application and attempts
The initial application fee is $225 USD, and an examination reapplication costs $200 USD. You have three examination attempts within three years of the opening of your initial examination window. Because the application deadline (three years after program completion) is a separate clock, plan the sequence deliberately. A full fee breakdown is in RTN Certification Cost 2026.
Maintaining the credential
- Annual renewal: $65, regardless of how many ARRT credentials you hold.
- Continuing education: 24 approved CE credits per two-year biennium, counted per biennium rather than per credential.
- Ethics: continuing compliance with ARRT ethics requirements.
- Continuing Qualifications Requirements (CQR): credentials earned on or after January 1, 2011 require CQR every 10 years, consisting of 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.
If you are weighing whether the investment of time and money is justified, Is the RTN Certification Worth It? and the RTN Salary Guide 2026 cover the return side, and RTN Jobs looks at where credentialed technologists work.
Frequently Asked Questions
Not through the primary pathway described here. You need an associate degree or higher from an ARRT-recognized accredited institution and completion of an ARRT-verified nuclear medicine technology educational program with its didactic and clinical competencies.
No. The degree may be in any major, but it must be conferred before you take the examination. The nuclear medicine education itself comes from the ARRT-verified program.
No more than five of the 25 required diagnostic and therapeutic procedures may be simulated. Competency must be verified by in-person direct observation from the program director or designee; remote or virtual observation is not accepted.
Procedures, which accounts for 118 of the 200 scored questions. Within it, Radionuclides and Radiopharmaceuticals (28), Cardiac (25) and Endocrine and Oncology (25) are the largest subcategories.
No. The passing score is 75 on ARRT's 1-99 scaled-score range, which is not a percentage of questions answered correctly. Each candidate also sees 30 unscored pilot questions that do not affect the result.