ASMIRT - MRI ACCREDITATION EXAM ACTUAL EXAM 2026 |
COMPLETE QUESTIONS AND CORRECT ANSWERS | VERIFIED ANSWERS
| JUST RELEASED
Question 1
Which of the following is a mild sensory effect caused by the static magnetic field?
A) Peripheral Nerve Stimulation (PNS)
B) Magnetophosphenes
C) Vertigo
D) Muscle contractions
E) Tissue heating
Correct Answer: C) Vertigo
Rationale: The study guide explicitly lists vertigo, nausea, and taste sensations as mild sensory
effects that can be caused by the static magnetic field.
Question 2
How do the mild sensory effects of the static magnetic field, such as nausea, change with
increasing field strength?
A) They decrease with increasing field strength.
B) They increase with increasing field strength.
C) They are not related to field strength.
D) They only occur at field strengths below 1.5T.
E) They are constant regardless of field strength.
Correct Answer: B) They increase with increasing field strength.
Rationale: The text states that sensory effects are related to the strength of the magnetic field,
with more symptoms appearing as the field strength approaches 4T compared to 1.5T.
Question 3
What is the T-wave artifact seen on an ECG during an MRI scan?
A) A decrease in the T-wave amplitude due to gradient switching.
B) An increase in the T-wave amplitude due to the magnetohydrodynamic effect.
C) An inversion of the T-wave caused by the RF pulse.
,D) A broadening of the T-wave due to acoustic noise.
E) A complete disappearance of the T-wave at high field strengths.
Correct Answer: B) An increase in the T-wave amplitude due to the magnetohydrodynamic
effect.
Rationale: The text explains that as blood (a conductive fluid) flows through the static
magnetic field, an electrical biopotential is induced. This is demonstrated on the ECG as an
increase in the T-wave amplitude.
Question 4
Why is it important for MR radiographers to be aware of the T-wave artifact?
A) Because it can interfere with the RF coil's function.
B) Because it can be mistaken for signs of ischemia or myocardial infarction.
C) Because it indicates the patient is experiencing vertigo.
D) Because it can cause the scanner to automatically abort the sequence.
E) Because it is a sign of peripheral nerve stimulation.
Correct Answer: B) Because it can be mistaken for signs of ischemia or myocardial infarction.
Rationale: The text specifically warns that elevated T-waves are also associated with serious
cardiac conditions like ischemia and myocardial infarction, so radiographers must be able to
differentiate the MRI-induced artifact from a true pathological sign.
Question 5
What two forces does the static magnetic field impart on ferromagnetic objects?
A) Translation and torque
B) Adsorption and diffusion
C) Heating and vibration
D) Attraction and repulsion
E) Permeation and penetration
Correct Answer: A) Translation and torque
Rationale: The text states that the static field imparts both a translational force (an attractive
,or pulling force) and a torque (a twisting or rotational force) on ferromagnetic implants and
objects.
Question 6
What is a primary safety strategy to prevent ferromagnetic objects from becoming airborne
projectiles?
A) Keeping the scan room door closed.
B) Testing any metal objects with a handheld magnet before they enter the room.
C) Instructing the patient to hold onto any metal objects tightly.
D) Increasing the humidity in the scan room.
E) Only scanning patients who have no metal on their person.
Correct Answer: B) Testing any metal objects with a handheld magnet before they enter the
room.
Rationale: The guide recommends testing any metal objects with a magnet as a practical way
to check if they are ferromagnetic and therefore pose a projectile risk before allowing them to
enter the strong magnetic field.
Question 7
The "5G line" refers to a safety boundary around the MRI scanner. What is its purpose?
A) To mark the area where RF heating is a concern.
B) To keep the general public, who may not be screened, away from the strong magnetic field.
C) To indicate the range of the gradient magnetic fields.
D) To define the acoustic noise hazard zone.
E) To mark the limit of the RF shielded room.
Correct Answer: B) To keep the general public, who may not be screened, away from the
strong magnetic field.
Rationale: The 5 Gauss (5G) line marks the perimeter where the static magnetic field is strong
enough to affect pacemakers and other implants. The text recommends keeping the general
public behind this line to ensure safety.
, Question 8
Which of the following is a possible contraindication for an MRI scan due to the static magnetic
field?
A) Claustrophobia
B) Aneurysm clips
C) Titanium hip replacement
D) Dental fillings
E) Tattoos
Correct Answer: B) Aneurysm clips
Rationale: The text lists several possible contraindications, including pacemakers and
aneurysm clips. Ferromagnetic aneurysm clips pose a significant risk of displacement and
torque, which can lead to fatal hemorrhage.
Question 9
The switching of gradient magnetic fields can induce electrical currents in conductive tissues.
This is dictated by:
A) Faraday's Law of Induction
B) The Lorentz Force Law
C) Newton's Third Law
D) The Law of Thermodynamics
E) The Principle of Superposition
Correct Answer: A) Faraday's Law of Induction
Rationale: The text explicitly states, "Faraday's Law dictates that changing magnetic fields will
generate a voltage and a current in a conductor." The switching gradients are changing
magnetic fields.
Question 10
What is the most common result of the voltages induced by switching gradient fields?
A) Seizures
B) Cardiac arrhythmias
COMPLETE QUESTIONS AND CORRECT ANSWERS | VERIFIED ANSWERS
| JUST RELEASED
Question 1
Which of the following is a mild sensory effect caused by the static magnetic field?
A) Peripheral Nerve Stimulation (PNS)
B) Magnetophosphenes
C) Vertigo
D) Muscle contractions
E) Tissue heating
Correct Answer: C) Vertigo
Rationale: The study guide explicitly lists vertigo, nausea, and taste sensations as mild sensory
effects that can be caused by the static magnetic field.
Question 2
How do the mild sensory effects of the static magnetic field, such as nausea, change with
increasing field strength?
A) They decrease with increasing field strength.
B) They increase with increasing field strength.
C) They are not related to field strength.
D) They only occur at field strengths below 1.5T.
E) They are constant regardless of field strength.
Correct Answer: B) They increase with increasing field strength.
Rationale: The text states that sensory effects are related to the strength of the magnetic field,
with more symptoms appearing as the field strength approaches 4T compared to 1.5T.
Question 3
What is the T-wave artifact seen on an ECG during an MRI scan?
A) A decrease in the T-wave amplitude due to gradient switching.
B) An increase in the T-wave amplitude due to the magnetohydrodynamic effect.
C) An inversion of the T-wave caused by the RF pulse.
,D) A broadening of the T-wave due to acoustic noise.
E) A complete disappearance of the T-wave at high field strengths.
Correct Answer: B) An increase in the T-wave amplitude due to the magnetohydrodynamic
effect.
Rationale: The text explains that as blood (a conductive fluid) flows through the static
magnetic field, an electrical biopotential is induced. This is demonstrated on the ECG as an
increase in the T-wave amplitude.
Question 4
Why is it important for MR radiographers to be aware of the T-wave artifact?
A) Because it can interfere with the RF coil's function.
B) Because it can be mistaken for signs of ischemia or myocardial infarction.
C) Because it indicates the patient is experiencing vertigo.
D) Because it can cause the scanner to automatically abort the sequence.
E) Because it is a sign of peripheral nerve stimulation.
Correct Answer: B) Because it can be mistaken for signs of ischemia or myocardial infarction.
Rationale: The text specifically warns that elevated T-waves are also associated with serious
cardiac conditions like ischemia and myocardial infarction, so radiographers must be able to
differentiate the MRI-induced artifact from a true pathological sign.
Question 5
What two forces does the static magnetic field impart on ferromagnetic objects?
A) Translation and torque
B) Adsorption and diffusion
C) Heating and vibration
D) Attraction and repulsion
E) Permeation and penetration
Correct Answer: A) Translation and torque
Rationale: The text states that the static field imparts both a translational force (an attractive
,or pulling force) and a torque (a twisting or rotational force) on ferromagnetic implants and
objects.
Question 6
What is a primary safety strategy to prevent ferromagnetic objects from becoming airborne
projectiles?
A) Keeping the scan room door closed.
B) Testing any metal objects with a handheld magnet before they enter the room.
C) Instructing the patient to hold onto any metal objects tightly.
D) Increasing the humidity in the scan room.
E) Only scanning patients who have no metal on their person.
Correct Answer: B) Testing any metal objects with a handheld magnet before they enter the
room.
Rationale: The guide recommends testing any metal objects with a magnet as a practical way
to check if they are ferromagnetic and therefore pose a projectile risk before allowing them to
enter the strong magnetic field.
Question 7
The "5G line" refers to a safety boundary around the MRI scanner. What is its purpose?
A) To mark the area where RF heating is a concern.
B) To keep the general public, who may not be screened, away from the strong magnetic field.
C) To indicate the range of the gradient magnetic fields.
D) To define the acoustic noise hazard zone.
E) To mark the limit of the RF shielded room.
Correct Answer: B) To keep the general public, who may not be screened, away from the
strong magnetic field.
Rationale: The 5 Gauss (5G) line marks the perimeter where the static magnetic field is strong
enough to affect pacemakers and other implants. The text recommends keeping the general
public behind this line to ensure safety.
, Question 8
Which of the following is a possible contraindication for an MRI scan due to the static magnetic
field?
A) Claustrophobia
B) Aneurysm clips
C) Titanium hip replacement
D) Dental fillings
E) Tattoos
Correct Answer: B) Aneurysm clips
Rationale: The text lists several possible contraindications, including pacemakers and
aneurysm clips. Ferromagnetic aneurysm clips pose a significant risk of displacement and
torque, which can lead to fatal hemorrhage.
Question 9
The switching of gradient magnetic fields can induce electrical currents in conductive tissues.
This is dictated by:
A) Faraday's Law of Induction
B) The Lorentz Force Law
C) Newton's Third Law
D) The Law of Thermodynamics
E) The Principle of Superposition
Correct Answer: A) Faraday's Law of Induction
Rationale: The text explicitly states, "Faraday's Law dictates that changing magnetic fields will
generate a voltage and a current in a conductor." The switching gradients are changing
magnetic fields.
Question 10
What is the most common result of the voltages induced by switching gradient fields?
A) Seizures
B) Cardiac arrhythmias
