- How the Radiology Practitioner Assistant Exam Is Built
- The 10 Content Components and Their Question Counts
- Domain 5: The 75-Question Anchor
- Domain 6: Medical Imaging Procedures
- Patient-Facing Domains: Education, Assessment and Communication
- Domain 4: Pharmacology and Contrast
- Radiation Biology and Fluoroscopy
- Documentation and Medical-Legal Domains
- Label Differences You Might Notice
- Sequencing the Domains in a Study Plan
- Eligibility and Logistics Worth Confirming
- Frequently Asked Questions
- The initial Radiology Practitioner Assistant exam has 200 multiple-choice questions across 10 content components, in 3 hours 30 minutes.
- Anatomy, Physiology, Pathophysiology and Image Evaluation carries 75 questions; Medical Imaging Procedures carries 40.
- The passing score is a scaled 75, not 75% correct.
- 20% of questions use image-based actual cases, and the content specifications identify nine case studies.
How the Radiology Practitioner Assistant Exam Is Built
The Radiology Practitioner Assistant (RPA) credential is issued by the Certification Board for Radiology Practitioner Assistants (CBRPA). The initial certification exam is a secure computer-based test delivered at Weber State University or at an approved off-site college or university with an institutional proctor. It contains 200 multiple-choice questions and allows 3 hours 30 minutes. Candidates must present two IDs, one of them photographic, and books and personal calculators are prohibited.
This guide is about the blueprint: the 10 content components that CBRPA's published content specifications use to organize the exam. Those headings describe what the exam measures. They are not a preparation curriculum, so treat them as a map of where questions come from rather than a syllabus handed to you by the issuer. For a broader plan that turns this map into a schedule, see our RPA study guide.
The 10 Content Components and Their Question Counts
CBRPA's content specifications publish a question count for each component. Two versions of the specifications are linked from the CBRPA site (one labeled 2013, one dated 10/2013 and effective July 1, 2014), and their summary tables agree. The counts below add up to the full 200 questions. CBRPA publishes counts, not percentage weights, so the table shows counts only.
| # | Content Component | Published Question Count |
|---|---|---|
| 1 | Patient Education | 6 |
| 2 | Patient Assessment and Management | 25 |
| 3 | Professional Communication | 10 |
| 4 | Pharmacology and Contrast | 20 |
| 5 | Anatomy, Physiology, Pathophysiology and Image Evaluation | 75 |
| 6 | Medical Imaging Procedures | 40 |
| 7 | Radiation Biology and Health Physics | 8 |
| 8 | Fluoroscopic Equipment and Operation | 8 |
| 9 | Medical Documentation and Records | 4 |
| 10 | Medical-Legal Circumstances | 4 |
Two things stand out immediately. First, the exam is heavily concentrated: components 5 and 6 together account for 115 of 200 questions. Second, the tail is thin: the last two components contribute 4 questions apiece. That shape should drive how you divide study hours, a point we return to in the sequencing section. If you are wondering how this distribution affects difficulty, our RPA exam difficulty guide discusses it from the candidate's perspective.
Domain 5: The 75-Question Anchor
Anatomy, Physiology, Pathophysiology and Image Evaluation (75 questions)
This is the largest component by a wide margin, and it is where the image-based questions concentrate in practice, since the exam draws 20% of its questions from image-based actual cases. The content specifications also identify nine case studies, so expect clinical scenarios rather than isolated fact recall.
- Normal anatomy as it appears on radiographs and fluoroscopic studies
- Physiologic processes that explain why a study is ordered or what a finding means
- Pathophysiology of conditions a radiologist-supervised practitioner will encounter
- Recognizing normal versus abnormal on an image, not just naming structures
Because this domain bundles four related skills, candidates sometimes underestimate it. Anatomy memorization alone is not enough. The component title pairs anatomy with image evaluation, which signals that you need to connect structure, disease process and appearance on an image. Practice with labeled and unlabeled images, and rehearse describing what you see in a sentence, not just a keyword.
Key Takeaway
With 75 of 200 questions, a weak showing in Domain 5 is hard to offset elsewhere. Even strong performance on the four smallest components combined (24 questions) could not make up for it.
Domain 6: Medical Imaging Procedures
Medical Imaging Procedures (40 questions)
The second-largest component tests how imaging examinations are performed and managed. For a candidate who is already an ARRT radiographer, much of this will feel familiar, but the exam frames it at the practitioner-assistant level, where you are expected to understand the procedure, its indications and its complications.
- Procedure steps, patient preparation and post-procedure considerations
- Indications and contraindications for common radiologic examinations
- Recognizing when a procedure is going wrong and what to do next
- How procedure knowledge links to contrast use and fluoroscopic technique
This domain overlaps naturally with Domain 4 (contrast) and Domain 8 (fluoroscopy). Studying them in adjacent blocks helps, because a single exam question can touch all three.
Patient-Facing Domains: Education, Assessment and Communication
Three components cover the human side of the job, totaling 41 questions between them.
Patient Assessment and Management (25 questions)
The largest of the three. Expect scenarios about evaluating a patient before and during a procedure, recognizing deterioration and responding appropriately. This is the component where clinical judgment matters most. Current ACLS is an eligibility requirement for the credential, and candidates with strong ACLS foundations tend to find the emergency-oriented scenarios more intuitive.
- Pre-procedure screening and history gathering
- Monitoring patients and recognizing adverse reactions
- Managing complications within the scope of supervised practice
Professional Communication (10 questions)
Questions here test how you interact with patients, families, radiologists and other staff. The correct answer is usually the one that is clear, appropriately escalated and consistent with the radiologist-supervised model of practice.
Patient Education (6 questions)
The smallest of the three, covering how you explain procedures, preparation and aftercare. It is low-volume but also low-effort to study, so it is among the best questions-per-hour investments on the exam.
Domain 4: Pharmacology and Contrast
Pharmacology and Contrast (20 questions)
Twenty questions on the medications and contrast agents used in imaging practice. Because personal calculators are prohibited, be prepared to handle any dose or rate reasoning without one.
- Contrast agent types, indications and contraindications
- Recognizing and responding to contrast reactions
- Medications commonly used in or around imaging procedures
- Patient factors that change contrast or drug decisions
This domain connects directly to Patient Assessment and Management: the decision to give or withhold a contrast agent starts with assessment, and the response to a reaction falls under management. Studying the two together mirrors how the scenarios are likely to be written.
Radiation Biology and Fluoroscopy
Two technical components carry 8 questions each, 16 combined.
Radiation Biology and Health Physics (8 questions)
Covers the biological effects of ionizing radiation and the principles of protection. As a working radiographer you likely know the basics; the exam asks you to apply them to practitioner-level situations such as fluoroscopic procedures with extended beam time.
- Dose concepts and the rationale for minimizing exposure
- Protection principles for patients, staff and the public
- Biological effects relevant to procedures you will assist with
Fluoroscopic Equipment and Operation (8 questions)
Tests your understanding of how fluoroscopy equipment works and how to operate it safely and effectively. Pair this with Domain 7, since technique choices and radiation dose are two sides of the same question.
Documentation and Medical-Legal Domains
The final two components are the smallest, 4 questions each, but they are also the most predictable.
Medical Documentation and Records (4 questions)
Expect questions on what must be documented, how, and when. The principle running through most answers is that documentation should be accurate, timely and sufficient for another clinician to understand what happened.
Medical-Legal Circumstances (4 questions)
Covers consent, scope of practice, supervision and related legal considerations. Because the Radiology Practitioner Assistant works under radiologist supervision, expect the correct answers to respect that supervisory structure and to follow institutional and legal requirements.
Label Differences You Might Notice
If you read the detailed sections of CBRPA's content specifications alongside the summary table, you may notice that some labels differ. The detailed-section headings for components 1, 7, 9 and 10 are not identical to the summary-table names. This guide uses the summary-table names throughout, which is the safer convention when matching against the published question counts. Do not be thrown if a source you are reading uses a slightly different heading for one of these four components; check the counts and the content described to confirm you are looking at the same area.
Also remember that the specifications documents currently linked from the CBRPA site are the 2013 and 2014 versions. Before you build a study plan around them, confirm with CBRPA that they remain current for your testing window. Our RPA exam dates guide covers scheduling, and the RPA passing score article explains how scaled scoring works.
Sequencing the Domains in a Study Plan
The question counts suggest a simple rule: spend your hours roughly in proportion to the points available, then adjust for your own weak spots. Here is one way to order the work, tied directly to the blueprint rather than to a generic template.
Domain 5 first
- Anatomy, physiology and pathophysiology by body system
- Daily image-reading practice, because 20% of questions are image-based cases
- Work through case-style scenarios, since the specifications identify nine case studies
Domains 6, 4 and 8 together
- Imaging procedures with their associated contrast and fluoroscopic considerations
- Contrast reactions and drug decisions
- Practice dose and rate reasoning without a calculator
Domains 2, 3 and 1
- Patient assessment scenarios and ACLS-linked decision making
- Communication and patient education
Domains 7, 9 and 10, then full review
- Radiation biology and health physics
- Documentation and medical-legal principles
- Timed practice in 3 hours 30 minute blocks against 200 questions
Adjust the length to your own schedule, but keep the logic: biggest domain first, related domains grouped, small domains last but not skipped. A one-page recap of the highest-yield facts helps in the final week; our RPA cheat sheet is built for that purpose, and you can test yourself against the real blueprint on the RPA practice test.
Eligibility and Logistics Worth Confirming
Knowing the domains is only half of preparation. Before you invest months, confirm that you qualify and understand the costs. Eligibility includes active ARRT radiographer status, a CBRPA-recognized academic program with a baccalaureate requirement, radiologist-supervised clinical competencies and current ACLS. Candidates who have completed the professional curriculum may test within six months before baccalaureate completion, with results held until degree completion.
On costs, off-site proctoring is USD 200 in addition to the examination fee and covers four billed proctor hours, not four hours of written-exam time. The Candidate Handbook lists a USD 200 retest application charge. We could not verify the current initial examination fee: the CBRPA fee-and-policy link returned a 404 error and the application does not state an amount, so we are not guessing. Check with CBRPA directly, and see our RPA certification cost breakdown for what we have confirmed. Annual renewal is USD 150 in the birth month and requires ARRT standing, ACLS and continuing-education compliance.
Key Takeaway
The scaled passing score of 75 is not the same as answering 75% of questions correctly. Do not set a "150 out of 200" goal and stop there; aim well above it in the heavy domains to leave margin.
Frequently Asked Questions
The initial exam has 200 multiple-choice questions, with 3 hours 30 minutes allowed. It is a secure computer examination delivered at Weber State University or an approved off-site college or university with an institutional proctor.
Anatomy, Physiology, Pathophysiology and Image Evaluation, with 75 questions. Medical Imaging Procedures is second with 40. Together they account for 115 of the 200 questions.
Yes. The content specifications state that 20% of questions use image-based actual cases and identify nine case studies. Practicing image evaluation is therefore part of preparing for the exam, not an optional extra.
No. The passing score is a scaled 75, which is not the same as 75% of questions answered correctly. See our passing score guide for details.
The 10 domain names reproduce the official content-component headings in CBRPA's content specifications summary tables. They describe what the exam measures and are not a preparation curriculum. Some detailed-section labels differ slightly for components 1, 7, 9 and 10, so this guide uses the summary-table names.