100+ Free ABMP MRI Physics Practice Questions

Pass your ABMP MRI Physics (Part II) Certification Exam exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

100+ Questions

100% Free

1 / 10

Question 1

Score: 0/0

What is the Larmor frequency of hydrogen protons in a 1.5 Tesla magnetic field?

42.58 MHz

63.87 MHz

127.74 MHz

21.29 MHz

to track

2026 Statistics

Key Facts: ABMP MRI Physics Exam

67%

2025 Pass Rate

ABMP

4 hours

Exam Duration

Part II written

$690

Part II Fee

$490 ISMRM members

Content Domains

ABMP outline

3 parts

Certification Path

Written + Written + Oral

1987

ABMP Founded

~400 active diplomates

The ABMP MRI Physics Part II written exam is nominally 4 hours and covers 7 weighted content domains. The 2026 Part II application fee is $690 ($490 for ISMRM members). The ABMP has certified nearly 400 physicists across all specialties since its founding in 1987. Pass rates for the MRI Physics Part II exam were 72% in 2023, 73% in 2024, and 67% in 2025.

Sample ABMP MRI Physics Practice Questions

Try these sample questions to test your ABMP MRI Physics exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the Larmor frequency of hydrogen protons in a 1.5 Tesla magnetic field?

A.42.58 MHz

B.63.87 MHz

C.127.74 MHz

D.21.29 MHz

Explanation: The Larmor equation states that the resonant frequency equals the gyromagnetic ratio multiplied by the magnetic field strength. For hydrogen protons, the gyromagnetic ratio is 42.58 MHz/T. At 1.5 T, the Larmor frequency is 42.58 x 1.5 = 63.87 MHz. This fundamental relationship governs all aspects of MRI signal generation and spatial encoding.

2Which quantum mechanical property of hydrogen nuclei makes them useful for MRI?

A.They have an even number of nucleons

B.They possess a net nuclear spin of 1/2

C.They have no magnetic moment

D.They exist in a single energy state in an external magnetic field

Explanation: Hydrogen nuclei (protons) have a nuclear spin quantum number of 1/2, which gives them a net magnetic moment. In an external magnetic field, spin-1/2 nuclei can occupy one of two energy states (parallel or antiparallel), enabling the NMR phenomenon. Nuclei with even numbers of both protons and neutrons have zero net spin and are not MR-visible.

3In the semi-classical vector model, what happens to the net magnetization vector immediately after a 90-degree RF pulse applied at the Larmor frequency?

A.It aligns with the B0 field along the z-axis

B.It is tipped entirely into the transverse (x-y) plane

C.It is inverted to point anti-parallel to B0

D.It is completely destroyed

Explanation: A 90-degree RF pulse tips the net magnetization vector from its equilibrium alignment along the z-axis (parallel to B0) entirely into the transverse (x-y) plane. This maximizes the transverse magnetization component, which is the source of the detectable MRI signal. The rotating frame model simplifies visualization of this nutation process by eliminating the rapid Larmor precession.

4Which relaxation mechanism is primarily responsible for T1 recovery in biological tissues?

A.Spin-spin interactions between neighboring protons

B.Dipole-dipole interactions modulated by molecular tumbling

C.Direct coupling to the static magnetic field

D.Chemical shift anisotropy at all field strengths

Explanation: T1 (longitudinal) relaxation in biological tissues is dominated by dipole-dipole interactions between hydrogen nuclei that are modulated by molecular tumbling motions. When the frequency of molecular motion (characterized by the correlation time) matches the Larmor frequency, energy transfer to the lattice is most efficient, resulting in short T1 values. This is why tissues with intermediate-sized molecules (like fat) have short T1 times.

5The Carr-Purcell-Meiboom-Gill (CPMG) sequence is used to measure which relaxation time?

A.T1

B.T2

C.T2*

D.T1rho

Explanation: The CPMG sequence measures T2 (transverse relaxation time) by applying a series of 180-degree refocusing pulses after an initial 90-degree excitation pulse. The 180-degree pulses refocus dephasing caused by static field inhomogeneities, isolating the true T2 decay from T2* effects. The Meiboom-Gill modification uses a 90-degree phase shift of the refocusing pulses relative to the excitation pulse to correct for imperfect flip angles.

6What is the primary difference between T2 and T2* relaxation?

A.T2* includes only spin-spin interactions while T2 includes all dephasing mechanisms

B.T2 is always shorter than T2*

C.T2* includes dephasing from static field inhomogeneities in addition to true T2 processes

D.T2* can be measured with a standard spin echo sequence

Explanation: T2* relaxation includes both the intrinsic T2 spin-spin relaxation and additional dephasing caused by static magnetic field inhomogeneities across a voxel. Therefore T2* is always shorter than or equal to T2. The relationship is expressed as 1/T2* = 1/T2 + 1/T2', where T2' represents the contribution of field inhomogeneities. Spin echo sequences refocus the T2' component, measuring true T2, while gradient echo sequences are sensitive to T2*.

7In the Bloch equations, what does the term M0 represent?

A.The maximum transverse magnetization after an RF pulse

B.The equilibrium longitudinal magnetization determined by the Boltzmann distribution

C.The magnetization in the rotating reference frame

D.The net magnetization after T2 decay

Explanation: In Bloch's phenomenological equations of relaxation, M0 represents the equilibrium longitudinal magnetization. It is determined by the Boltzmann distribution of nuclear spin populations between parallel and antiparallel energy states. M0 is proportional to the spin density, the square of the gyromagnetic ratio, and the static field strength B0, and inversely proportional to the absolute temperature.

8Which experiment is used to measure T1 relaxation time by first inverting the magnetization and then sampling its recovery?

A.Saturation recovery

B.Inversion recovery

C.CPMG sequence

D.Stimulated echo

Explanation: The inversion recovery experiment applies a 180-degree inversion pulse followed by a variable delay time (TI) and then a 90-degree readout pulse. By measuring the signal at multiple TI values, the T1 recovery curve can be mapped. Saturation recovery uses a 90-degree pulse instead of an inversion pulse, providing less dynamic range for T1 measurement. The CPMG sequence measures T2.

9J-coupling in NMR refers to which phenomenon?

A.Direct dipole-dipole interactions between neighboring nuclei through space

B.Indirect spin-spin coupling between nuclei mediated through bonding electrons

C.Coupling between the nuclear spin and the external magnetic field

D.Exchange of magnetization between free and bound water pools

Explanation: J-coupling (also called scalar coupling or indirect spin-spin coupling) is a through-bond interaction where the spin state of one nucleus influences the electron cloud, which in turn affects the resonant frequency of a neighboring nucleus connected through chemical bonds. J-coupling causes splitting of spectral lines and is important in MR spectroscopy. It is distinct from direct dipole-dipole coupling, which occurs through space.

10How does T1 relaxation time generally change as the static magnetic field strength B0 increases?

A.T1 decreases at higher field strengths

B.T1 increases at higher field strengths

C.T1 remains constant regardless of field strength

D.T1 first decreases then increases with field strength

Explanation: T1 relaxation time generally increases with increasing B0 field strength for most biological tissues. This occurs because at higher Larmor frequencies, the spectral density of molecular motions at the resonance frequency decreases for typical biological correlation times, making longitudinal relaxation less efficient. This is an important consideration when comparing protocols between 1.5 T and 3 T systems.

About the ABMP MRI Physics Exam

The ABMP MRI Physics Part II exam is the written specialty examination for Magnetic Resonance Imaging Physics certification from the American Board of Medical Physics. It tests clinical competence across 7 domains including NMR physics, imaging theory, advanced techniques, contrast agents, equipment QC, and MR safety. Candidates must first pass Part I (General Medical Physics or MR Science) before sitting for this exam.

Questions

100 scored questions

Time Limit

4 hours

Passing Score

Pass/Fail (set by Board)

Exam Fee

$690 (ABMP)

ABMP MRI Physics Exam Content Outline

15%

Physics of Nuclear Magnetic Resonance

Fundamental NMR physics including magnetic dipole properties, Larmor equation, spin dynamics, T1/T2 relaxation mechanisms, Bloch equations, and spectroscopy principles.

15%

MR Imaging Theory and Image Reconstruction

Fourier transform imaging, k-space sampling, slice selection, frequency and phase encoding, image resolution, field-of-view, and reconstruction algorithms.

15%

MR Image Characteristics and Artifacts

Signal-to-noise ratio, contrast-to-noise ratio, spatial resolution, common MR artifacts including motion, aliasing, chemical shift, truncation, and susceptibility artifacts.

15%

Advanced Imaging Techniques and System Features

Gradient echo sequences, diffusion-weighted imaging, MR spectroscopy, parallel imaging, echo planar imaging, perfusion imaging, and functional MRI techniques.

15%

Contrast Enhancement, MR Angiography and Cardiac MRI

Gadolinium-based contrast agents, dynamic contrast enhancement, time-of-flight and phase-contrast MR angiography, cardiac gating, and cardiac MRI protocols.

15%

MR Technology and Equipment Quality Control

MR system components, superconducting magnets, gradient systems, RF coils, QC testing procedures, phantom measurements, and performance benchmarks.

10%

Site Planning and Safety of MR Examinations

MR facility zoning, RF and magnetic shielding, safety screening procedures, implant safety, quench hazards, acoustic noise, SAR monitoring, and regulatory compliance.

How to Pass the ABMP MRI Physics Exam

What You Need to Know

Passing score: Pass/Fail (set by Board)
Exam length: 100 questions
Time limit: 4 hours
Exam fee: $690

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

ABMP MRI Physics Study Tips from Top Performers

1Master NMR fundamentals: the Larmor equation, Bloch equations, T1/T2 relaxation mechanisms, and spin echo formation are the foundation for all other topics

2Understand k-space thoroughly — know how sampling patterns affect image resolution, FOV, and artifact generation

3Study each major artifact type: learn to identify causes, recognize appearances, and apply correction strategies

4Review advanced sequences systematically: gradient echo variants (FLASH, FISP, true FISP), diffusion-weighted imaging, and MR spectroscopy

5Know MR angiography methods: compare time-of-flight vs. phase-contrast vs. contrast-enhanced approaches

6Practice QC procedures: ACR phantom testing, SNR measurements, geometric accuracy checks, and slice thickness verification

7Study MR safety zones (I-IV), implant screening protocols, SAR limits, and quench emergency procedures

Frequently Asked Questions

What is the ABMP MRI Physics Part II exam pass rate?

The ABMP publishes pass rates annually. Recent Part II MRI Physics pass rates were 72% (2023), 73% (2024), and 67% (2025). These rates reflect the specialized nature of the candidate pool, as all applicants must hold a graduate degree and have passed Part I before attempting Part II.

How many questions are on the ABMP MRI Physics Part II exam?

The Part II MRI Physics exam is nominally 4 hours and consists of multiple-choice, matching, choose-all-that-apply, and Type S questions. The ABMP does not publish the exact question count. Questions cover 7 weighted content domains from NMR physics through site planning and safety.

What are the prerequisites for the ABMP MRI Physics exam?

For MRI Physics certification, you must pass Part I (either General Medical Physics or MR Science), then Part II, then Part III (oral). Part I requires a graduate degree in physics, medical physics, or a related field. Part II requires professional experience (1-4 years depending on degree) and two endorsement letters from board-certified professionals.

How much does the ABMP MRI Physics exam cost?

The 2026 ABMP exam fees are: Part I written exam $390, Part II written exam $690 ($490 for ISMRM members), and Part III oral exam $790. PayPal payments incur an additional convenience fee. Total certification cost across all three parts ranges from $1,870 to $1,870 at standard rates.

What is the difference between ABMP and ABR MRI Physics certification?

The ABMP (American Board of Medical Physics) and ABR (American Board of Radiology) both certify medical physicists. The ABMP specifically offers MRI Physics as a standalone specialty certification, while the ABR certifies in broader categories. By agreement with the ABR, the ABMP discontinued Radiation Therapy and Diagnostic Imaging exams in 2001 but continues MRI Physics and Medical Health Physics certifications.

How long should I study for the ABMP MRI Physics exam?

Most candidates prepare over 3-6 months while working clinically. Focus study time proportionally across the 7 domains, giving extra attention to the six 15%-weighted areas that collectively account for 90% of the exam. Practice with MR physics textbooks, ACR phantom data, and clinical case review. The ABMP provides suggested references on their website.