ARRT I.A.(MR) Exam Blueprint & Safety Passing Threshold

ARRT I.A.(MR) Exam Blueprint & Safety Passing Threshold

Examination Blueprint Architecture & Question Distribution

The ARRT I.A.(MR) examination consists of 120 total multiple-choice questions. Candidates are administered the examination on a computer terminal at a certified Pearson VUE professional testing center. Of the 120 total questions, 100 questions are scored items that determine the candidate's final examination score, and 20 questions are unscored pilot (pre-test) items.

The Role of Pilot (Pre-Test) Questions

The 20 unscored pilot items are distributed throughout the examination and are visually and structurally indistinguishable from scored questions. Psychometricians and the ARRT Magnetic Resonance Examination Committee embed these experimental items to evaluate their statistical validity, difficulty index, and discrimination coefficient before incorporating them as scored items on future examination forms. Because candidates cannot identify which questions are scored and which are unscored, candidates must approach every question with equal diligence and analytical focus.

Content Category Weighting

The 100 scored items are partitioned across three primary clinical domains defined by the ARRT Practice Analysis:

ARRT I.A.(MR) Content Domain Distribution (100 Scored Questions):
├── 1. Patient Care: 31 Questions (31%)
├── 2. Safety: 37 Questions (37%)
└── 3. Positioning & Anatomical Landmarking: 32 Questions (32%)
    ├── Neurological Imaging: 10 Questions (10%)
    ├── Body & Torso Imaging: 10 Questions (10%)
    └── Musculoskeletal Imaging: 12 Questions (12%)

1. Patient Care (31 Scored Items / 31%): Assesses professional ethics, patient rights, legal liability (respondeat superior, res ipsa loquitur), therapeutic communication, claustrophobia mitigation, infection control, CDC Standard Precautions, transmission-based isolation, hand hygiene, safe patient handling and transfer mechanics, vital signs measurement, and contrast media fundamentals (including nephrogenic systemic fibrosis [NSF] screening and acute adverse contrast reaction response).
2. Safety (37 Scored Items / 37%): Represents the largest single content domain on the examination. Assesses the ACR Four MR Safety Zones, MR personnel classifications (Non-MR Personnel, Level 1, Level 2, MRSO, MRMD), two-tier screening workflows, ferromagnetic detection systems (FMDS), ASTM F2503 device labeling (MR Safe, MR Conditional, MR Unsafe), screening high-risk implants (pacemakers, ICDs, neurostimulators, cochlear implants, aneurysm clips), static magnetic field mechanical hazards ($B_0$, spatial gradients, missile/projectile effect), radiofrequency ($B_1$) heating, Specific Absorption Rate (SAR), conductive loop prevention, time-varying gradient magnetic fields ($dB/dt$, acoustic noise, peripheral nerve stimulation), liquid helium cryogen properties, spontaneous and manual magnet quench protocols, Zone IV fire safety, and emergency patient evacuation.
3. Positioning and Anatomical Landmarking (32 Scored Items / 32%): Assesses hands-on technical positioning, RF coil selection, patient immobilization, laser crosshair centering, and anatomical landmarking across three body regions:
   • Neurological Imaging (10 Scored Items): Brain, internal auditory canals (IAC), pituitary gland, orbits, cervical spine, thoracic spine, and lumbar/sacral spine.
   • Body & Torso Imaging (10 Scored Items): Dedicated breast MRI, chest and thoracic inlet, brachial plexus, abdomen (liver/pancreas), and pelvis/MRCP enterography.
   • Musculoskeletal Imaging (12 Scored Items): Upper extremity (shoulder, elbow, wrist/hand) and lower extremity (hip, knee, ankle/foot, long bones).

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Scaled Scoring Mechanics: The Standard Passing Score of 75

The ARRT does not utilize a raw percentage calculation (e.g., 75 correct out of 100 questions) to determine pass or fail status. Instead, the ARRT reports examination results using a scaled score ranging from 1 to 99, with a scaled score of 75 established as the universal passing standard.

Scaled Scores Are Not Percentages

ARRT adjusts scores to account for differences in examination-form difficulty. It does not publish one fixed raw number of correct answers that always produces 75. Do not memorize invented examples such as 68 or 74 correct answers as an official passing requirement. The overall score ranges from 1 to 99, while section scores are reported from 0.1 to 9.9. An overall score is not an arithmetic average of the section scores.

The Critical ARRT Safety Passing Subscore Threshold

In standard standardized testing environments, high performance in one academic subject can compensate for substandard performance in another. However, magnetic resonance imaging is inherently unforgiving: an operational failure in screening, ferromagnetic detection, or thermal burn prevention can cause catastrophic patient injury or fatality.

Mandatory Safety Subscore Rule

To safeguard patients and clinical personnel, the ARRT enforces a mandatory passing subscore threshold specifically on the Safety section. Under this psychometric policy:

1. A candidate must achieve an overall composite scaled score of at least 75 across the entire 100 scored items.
2. AND the candidate must concurrently meet or exceed the established cut-score threshold on the MRI Screening and Safety section: 7.5 or higher, based on 37 scored questions.

ARRT Passing Determination Rule:
Overall Scaled Score ≥ 75  AND  Safety Subscore ≥ Safety Passing Cut-Score ➔ PASS
Overall Scaled Score ≥ 75  BUT  Safety Subscore < Safety Passing Cut-Score ➔ FAIL
Overall Scaled Score < 75  (Regardless of Safety Subscore)               ➔ FAIL

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Pearson VUE Testing Center Logistics & Time Management

The ARRT contracts exclusively with Pearson VUE to administer computerized examinations at secure testing centers worldwide.

Appointment Structure and Identification

The 2026 handbook specifies 120 minutes of test time and a 140-minute appointment: 8 minutes for the tutorial, 2 for the NDA, 120 for the exam and 10 for the survey. Check-in is separate; arrive as instructed. Present the two acceptable identification documents required by the handbook: a primary government-issued photo/signature ID and an acceptable secondary ID, with names matching the ARRT record. Both documents do not necessarily have to be government-issued. Resolve name or accommodation issues before the appointment.

Read and accept the NDA within its two-minute limit; refusal or timeout ends the session and affects the fee and attempt as the handbook explains. Do not bring personal study material into the test room or share recalled examination content. Use the tutorial to learn the calculator, review and flag tools. The computer requires an answer before advancing, and flagged answers can be reviewed if time remains.

Pacing Strategy: 60 Seconds per Question

With 120 questions and 120 minutes of examination time, candidates have an exact average pacing budget of 60 seconds (1.0 minute) per question.

Three-Pass Time Management Strategy:
├── Pass 1 (Minutes 0–80): Read each question once. Answer confident items immediately (~40s each).
│                          Flag complex, calculation-heavy, or ambiguous items and choose best initial guess.
├── Pass 2 (Minutes 81–110): Filter directly to flagged items. Re-read clinical stems, analyze distractors,
│                           and finalize decisions without rushing.
└── Pass 3 (Minutes 111–120): Confirm that ZERO questions remain unanswered. Check for accidental clicks.

• No Negative Marking: The ARRT scoring engine awards one raw point for each correct answer and zero points for incorrect answers or blanks. Because incorrect answers carry no penalty, a candidate must never leave any question unanswered.
• The Flag and Return Feature: If a complex scenario or unfamiliar implant model appears, the candidate should make an educated preliminary selection, click the "Flag for Review" button, and move forward immediately. Spending 3 to 4 minutes agonizing over a single question induces time panic during later sections.

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Applications, Retakes and the Fall 2026 Window

Candidates have three attempts within three years beginning when the first exam window opens. Each attempt requires the appropriate application and fee. Reapplication must reach ARRT at least 30 calendar days before the three-year eligibility period ends. After exhausting the attempts or time, requalification requires a new set of clinical and education requirements dated after the last attempt or eligibility-period end, as specified by ARRT. Do not substitute a generic requirement to repeat a college degree, or assert a 10-day waiting period that the current I.A. handbook does not state.

As checked October 19, 2026, the initial discounted application deadline was October 14 at 11:59 p.m.; approved fall candidates test October 15–November 30 for the one-time $75 fee. Applications after that deadline use the standard $225 fee and testing on or after January 1, 2027. Use the current ARRT credential page and Candidate Status Report for the applicable window rather than assuming a continuously open 2026 schedule. Pearson administers the examination at test centers.

Preparing Across the Blueprint

Spend practice time across all three domains, with extra review where errors persist. Safety has the largest weight and its own threshold, but neglecting patient care or positioning can still lower the overall result. Review the reason for every missed response. Never infer that an unfamiliar item is unscored; pilot items cannot be identified and every question deserves a best answer.

At 120 items in 120 minutes, the average budget is 60 seconds per item. A 40-second first pass through 120 items uses 80 minutes, leaving 40 minutes for review. This is a study strategy, not an ARRT pacing requirement. Make the required initial selection, flag uncertain items, and keep progressing. Re-read words such as first, best and except. Avoid changing a supported answer solely from anxiety.

Official Sources and Check Date

Official facts checked October 19, 2026: ARRT I.A.(MR) credential and current documents, ARRT Standards of Ethics, 2026 ACR MR Safety resources, ACR Contrast Manual, CDC hand hygiene and HHS treatment-disclosure exception. This is independent OpenExamPrep teaching, not sponsor approval or a substitute for supervised clinical training.