ARMRIT MRI Registry Review and Practice Exam
Guide 2025/2026 – U.S. Certification Prep 2025/2026
Complete 100-Question Practice Exam with Answers and
Explanations
EXAM OVERVIEW
The American Registry of Magnetic Resonance Imaging Technologists (ARMRIT)
certification exam is approximately 4 hours long and contains 225 multiple-choice
questions covering MRI physics, safety procedures, patient care, and cross-sectional
anatomy . The exam is administered by PSI Computer Testing at over 1000 testing sites
nationally and internationally . A scaled score of 75 is required to pass .
Content Categories :
Professional Practice: 1-4%
Patient Management: 6-10%
Health and Safety (including MR Safety): 10-14%
Operation of Equipment: 14-18%
Pharmaceutical Administration: 1-5%
Imaging Procedures - Musculoskeletal: 11-15%
Imaging Procedures - Head and Neck: 11-15%
Imaging Procedures - Spine: 10-14%
SECTION 1: MRI PHYSICS AND INSTRUMENTATION
Question 1: Which subatomic particle is primarily responsible for the magnetic
properties of an atom utilized in Magnetic Resonance Imaging?
A) Neutron
B) Electron
C) Proton
D) Photon
,Correct Answer: C) Proton
Explanation: The hydrogen proton (¹H) is the nucleus used in MRI due to its abundance in
the human body and its magnetic moment. The proton acts like a tiny bar magnet,
aligning with the external magnetic field .
Question 2: What is the primary function of shim coils in an MRI system?
A) To generate the powerful, static main magnetic field (B0)
B) To transmit and receive radiofrequency (RF) energy
C) To correct for small inhomogeneities in the main magnetic field
D) To spatially encode the MR signal by creating gradient fields
Correct Answer: C) To correct for small inhomogeneities in the main magnetic field
Explanation: Shim coils are used to produce small magnetic fields that compensate for
non-uniformities in the main magnetic field (B0). This improves image quality by ensuring
the field is as homogeneous as possible across the imaging volume .
Question 3: The T1 process is also known as:
A) Spin-spin relaxation
B) Spin-lattice relaxation
C) Free induction decay
D) Phase coherence
Correct Answer: B) Spin-lattice relaxation
Explanation: T1 relaxation is the process by which protons transfer energy to the
surrounding molecular lattice, allowing longitudinal magnetization to recover. It is also
called spin-lattice relaxation .
,Question 4: Which type of MR magnet requires cryogen to cool the magnetic coil to 4
degrees Kelvin (-269°C)?
A) Permanent magnet
B) Resistive magnet
C) Superconductive magnet
D) Electromagnet
Correct Answer: C) Superconductive magnet
Explanation: Superconductive magnets require cryogens (liquid helium or nitrogen) to
maintain the coil at extremely low temperatures, allowing current to flow without
resistance. Most clinical MRI systems use superconductive magnets .
Question 5: According to the Larmor equation, what determines the precise
precessional frequency of hydrogen protons?
A) The amplitude of the applied Radiofrequency (RF) pulse
B) The specific Gyromagnetic Ratio of hydrogen and the strength of B0
C) The temperature of the cryogens cooling the magnet
D) The number of slices acquired in the pulse sequence
Correct Answer: B) The specific Gyromagnetic Ratio of hydrogen and the strength
of B0
Explanation: The Larmor equation (ω = γ × B0) states that precessional frequency is the
product of the gyromagnetic ratio (γ, a constant for each nucleus) and the strength of the
external magnetic field (B0) .
Question 6: The gyromagnetic ratio of hydrogen at 1.0T is approximately:
A) 21.28 MHz/T
B) 42.58 MHz/T
C) 63.87 MHz/T
D) 127.74 MHz/T
, Correct Answer: B) 42.58 MHz/T
Explanation: The gyromagnetic ratio (γ) for hydrogen is 42.58 MHz per Tesla. This means
that at 1.0T, hydrogen protons precess at 42.58 MHz .
Question 7: The Larmor frequency of hydrogen protons in a static magnetic field of 0.5T
is approximately:
A) 42.58 MHz
B) 63.87 MHz
C) 25.5 MHz
D) 21.29 MHz
Correct Answer: D) 21.29 MHz
Explanation: At 0.5T, the Larmor frequency = 42.58 MHz/T × 0.5T = 21.29 MHz. This is
the frequency at which hydrogen protons precess in this field strength .
Question 8: A magnetic field strength of 0.5T is equivalent to:
A) 500 G
B) 5,000 G
C) 10,000 G
D) 50,000 G
Correct Answer: B) 5,000 G
Explanation: 1 Tesla (T) equals 10,000 Gauss (G). Therefore, 0.5T = 5,000 G. The Tesla is
the SI unit of magnetic flux density .
Question 9: Nuclei in their natural environment (in the absence of a static magnetic
field) are aligned:
Guide 2025/2026 – U.S. Certification Prep 2025/2026
Complete 100-Question Practice Exam with Answers and
Explanations
EXAM OVERVIEW
The American Registry of Magnetic Resonance Imaging Technologists (ARMRIT)
certification exam is approximately 4 hours long and contains 225 multiple-choice
questions covering MRI physics, safety procedures, patient care, and cross-sectional
anatomy . The exam is administered by PSI Computer Testing at over 1000 testing sites
nationally and internationally . A scaled score of 75 is required to pass .
Content Categories :
Professional Practice: 1-4%
Patient Management: 6-10%
Health and Safety (including MR Safety): 10-14%
Operation of Equipment: 14-18%
Pharmaceutical Administration: 1-5%
Imaging Procedures - Musculoskeletal: 11-15%
Imaging Procedures - Head and Neck: 11-15%
Imaging Procedures - Spine: 10-14%
SECTION 1: MRI PHYSICS AND INSTRUMENTATION
Question 1: Which subatomic particle is primarily responsible for the magnetic
properties of an atom utilized in Magnetic Resonance Imaging?
A) Neutron
B) Electron
C) Proton
D) Photon
,Correct Answer: C) Proton
Explanation: The hydrogen proton (¹H) is the nucleus used in MRI due to its abundance in
the human body and its magnetic moment. The proton acts like a tiny bar magnet,
aligning with the external magnetic field .
Question 2: What is the primary function of shim coils in an MRI system?
A) To generate the powerful, static main magnetic field (B0)
B) To transmit and receive radiofrequency (RF) energy
C) To correct for small inhomogeneities in the main magnetic field
D) To spatially encode the MR signal by creating gradient fields
Correct Answer: C) To correct for small inhomogeneities in the main magnetic field
Explanation: Shim coils are used to produce small magnetic fields that compensate for
non-uniformities in the main magnetic field (B0). This improves image quality by ensuring
the field is as homogeneous as possible across the imaging volume .
Question 3: The T1 process is also known as:
A) Spin-spin relaxation
B) Spin-lattice relaxation
C) Free induction decay
D) Phase coherence
Correct Answer: B) Spin-lattice relaxation
Explanation: T1 relaxation is the process by which protons transfer energy to the
surrounding molecular lattice, allowing longitudinal magnetization to recover. It is also
called spin-lattice relaxation .
,Question 4: Which type of MR magnet requires cryogen to cool the magnetic coil to 4
degrees Kelvin (-269°C)?
A) Permanent magnet
B) Resistive magnet
C) Superconductive magnet
D) Electromagnet
Correct Answer: C) Superconductive magnet
Explanation: Superconductive magnets require cryogens (liquid helium or nitrogen) to
maintain the coil at extremely low temperatures, allowing current to flow without
resistance. Most clinical MRI systems use superconductive magnets .
Question 5: According to the Larmor equation, what determines the precise
precessional frequency of hydrogen protons?
A) The amplitude of the applied Radiofrequency (RF) pulse
B) The specific Gyromagnetic Ratio of hydrogen and the strength of B0
C) The temperature of the cryogens cooling the magnet
D) The number of slices acquired in the pulse sequence
Correct Answer: B) The specific Gyromagnetic Ratio of hydrogen and the strength
of B0
Explanation: The Larmor equation (ω = γ × B0) states that precessional frequency is the
product of the gyromagnetic ratio (γ, a constant for each nucleus) and the strength of the
external magnetic field (B0) .
Question 6: The gyromagnetic ratio of hydrogen at 1.0T is approximately:
A) 21.28 MHz/T
B) 42.58 MHz/T
C) 63.87 MHz/T
D) 127.74 MHz/T
, Correct Answer: B) 42.58 MHz/T
Explanation: The gyromagnetic ratio (γ) for hydrogen is 42.58 MHz per Tesla. This means
that at 1.0T, hydrogen protons precess at 42.58 MHz .
Question 7: The Larmor frequency of hydrogen protons in a static magnetic field of 0.5T
is approximately:
A) 42.58 MHz
B) 63.87 MHz
C) 25.5 MHz
D) 21.29 MHz
Correct Answer: D) 21.29 MHz
Explanation: At 0.5T, the Larmor frequency = 42.58 MHz/T × 0.5T = 21.29 MHz. This is
the frequency at which hydrogen protons precess in this field strength .
Question 8: A magnetic field strength of 0.5T is equivalent to:
A) 500 G
B) 5,000 G
C) 10,000 G
D) 50,000 G
Correct Answer: B) 5,000 G
Explanation: 1 Tesla (T) equals 10,000 Gauss (G). Therefore, 0.5T = 5,000 G. The Tesla is
the SI unit of magnetic flux density .
Question 9: Nuclei in their natural environment (in the absence of a static magnetic
field) are aligned:
