ASMIRT MRI ACCREDITATION EXAM - PRACTICE QUESTIONS
(VERSION 1) EXAM — 2026/2027 | QUESTIONS
AND CORRECT ANSWERS WITH DETAILED RATIONALES | ALREADY
GRADED A+ | 100% VERIFIED
SECTION 1: PATIENT CARE, SAFETY, AND ETHICS (Questions 1-10)
Q1. A patient with a known cardiac pacemaker presents for an MRI. The
pacemaker
is identified as MR-Unsafe. What is the most appropriate action?
A) Proceed with the scan using a lower SAR setting.
B) Proceed with the scan but monitor the patient's ECG closely.
C) Do not perform the MRI and consult with the patient's cardiologist.
D) Perform the scan only on a 1.5T scanner, not a 3T.
Correct Answer: C
Rationale: An MR-Unsafe implant poses a significant risk to the patient,
including device malfunction, heating, or movement, which can be fatal. The
static magnetic field, RF energy, and gradient fields can all interfere with
pacemaker function. Lowering SAR or using a different field strength does
not eliminate the risk. The only safe course is to avoid the MRI and consult
the cardiologist to determine if an alternative imaging modality (e.g., CT)
is appropriate or if the pacemaker can be safely reprogrammed or replaced
with an MR-conditional device. Option A is incorrect because SAR reduction
does not address the risks from the static field. Option B is incorrect
because ECG monitoring does not prevent device malfunction. Option D is
incorrect because MR-Unsafe applies to all field strengths.
Q2. Which of the following is the primary safety concern associated with the
static magnetic field of an MRI scanner?
A) Heating of implanted devices.
B) The projectile effect on ferromagnetic objects.
C) Peripheral nerve stimulation.
1
, D) Acoustic noise.
Correct Answer: B
Rationale: The static magnetic field (B0) exerts a powerful attractive force
on ferromagnetic objects. This can turn everyday items (e.g., oxygen
cylinders, scissors, keys) into dangerous projectiles, causing serious injury
or death. This is the primary safety concern for anyone entering the scan
room. Option A is incorrect because heating is primarily caused by RF energy,
not the static field. Option C is incorrect because peripheral nerve
stimulation is caused by rapidly switching gradient magnetic fields. Option
D is incorrect because acoustic noise is generated by the gradient coils,
not the static field.
Q3. A patient is referred for an MRI with a history of metal fragments in the eye
from a workplace accident. What is the priority action?
A) Proceed with the scan, as the fragments are likely too small to be a risk.
B) Ask the patient to remove their contact lenses and proceed.
C) Request a skull X-ray or CT to rule out intraocular metallic foreign
bodies.
D) Scan the patient but use a head coil to limit the field of view.
Correct Answer: C
Rationale: Metallic foreign bodies in the eye are an absolute
contraindication for MRI unless proven to be non-ferromagnetic. The strong
magnetic field could cause the fragment to move, potentially leading to
blindness or severe eye damage. A skull X-ray or CT is the standard method to
detect and characterise such fragments. Option A is incorrect because even
small fragments can cause injury. Option B is incorrect because contact
lenses are irrelevant to the risk. Option D is incorrect because the static
field extends throughout the scan room; using a head coil does not reduce the
risk.
Q4. The specific absorption rate (SAR) is a measure of:
A) The strength of the magnetic field.
2
, B) The rate at which RF energy is absorbed by the patient's tissue.
C) The speed of the gradient switching.
D) The loudness of the acoustic noise.
Correct Answer: B
Rationale: SAR quantifies the amount of RF power absorbed per unit mass of
tissue, measured in watts per kilogram (W/kg). It is a critical safety
parameter because excessive RF absorption can cause tissue heating and burns.
Option A is incorrect; magnetic field strength is measured in Tesla. Option C
is incorrect; gradient switching speed relates to dB/dt and peripheral nerve
stimulation. Option D is incorrect; acoustic noise is measured in decibels
and is related to gradient coil vibration.
Q5. A patient is 12 weeks pregnant. The referring doctor has requested an MRI for
a suspected appendicitis. What is the most appropriate course of action?
A) Refuse the scan until after the pregnancy.
B) Perform the scan without any modifications.
C) Consult with the radiologist and referring doctor to confirm the medical
necessity, and if performed, use the lowest SAR settings and limit scan
time.
D) Perform the scan, but only after obtaining a signed consent form from the
patient.
Correct Answer: C
Rationale: MRI is generally avoided in the first trimester unless the
clinical benefit clearly outweighs potential risks. The safety of MRI during
pregnancy is not fully established, particularly regarding RF heating and
acoustic noise. The ALARA (As Low As Reasonably Achievable) principle should
be applied. Consultation with the radiologist and referring doctor is
essential to confirm that MRI is the best diagnostic option. If performed,
use the lowest SAR mode, minimise scan time, and avoid unnecessary
sequences. Option A is too absolute; some urgent conditions may require MRI.
Option B ignores safety precautions. Option D is insufficient; patient
consent does not replace medical justification.
3
, Q6. Which of the following is considered an MR-Conditional implant?
A) A ferromagnetic aneurysm clip.
B) A cochlear implant that has been tested and approved for MRI under
specific conditions.
C) A standard cardiac pacemaker.
D) A metallic splinter in the hand.
Correct Answer: B
Rationale: An MR-Conditional implant is one that has been demonstrated to
pose no known hazard in a specified MRI environment under specified
conditions of use (e.g., static field strength, SAR limits, coil type). A
cochlear implant approved under specific conditions is an example. Option A
is MR-Unsafe. Option C is typically MR-Unsafe unless it is a specifically
designed MR-conditional pacemaker. Option D is a foreign body that must be
evaluated; it is not an implant.
Q7. The "quench" of an MRI magnet refers to:
A) The sudden and rapid loss of superconductivity, causing the helium to
boil off rapidly.
B) The process of ramping the magnet up to full field strength.
C) The daily quality assurance check of the magnet.
D) The acoustic noise generated during a fast scan sequence.
Correct Answer: A
Rationale: A quench occurs when the superconducting wire in the magnet coils
loses its superconductivity, often due to a fault or deliberate emergency
shutdown. This causes a rapid increase in resistance, heating the coils and
causing the liquid helium coolant to boil off violently as gas. The sudden
expansion of helium gas can displace oxygen in the scan room, creating an
asphyxiation hazard. Option B is called ramping. Option C is a QA procedure.
Option D is unrelated to magnet quench.
Q8. In the event of a magnet quench, what is the most critical immediate action
for the technologist?
4
(VERSION 1) EXAM — 2026/2027 | QUESTIONS
AND CORRECT ANSWERS WITH DETAILED RATIONALES | ALREADY
GRADED A+ | 100% VERIFIED
SECTION 1: PATIENT CARE, SAFETY, AND ETHICS (Questions 1-10)
Q1. A patient with a known cardiac pacemaker presents for an MRI. The
pacemaker
is identified as MR-Unsafe. What is the most appropriate action?
A) Proceed with the scan using a lower SAR setting.
B) Proceed with the scan but monitor the patient's ECG closely.
C) Do not perform the MRI and consult with the patient's cardiologist.
D) Perform the scan only on a 1.5T scanner, not a 3T.
Correct Answer: C
Rationale: An MR-Unsafe implant poses a significant risk to the patient,
including device malfunction, heating, or movement, which can be fatal. The
static magnetic field, RF energy, and gradient fields can all interfere with
pacemaker function. Lowering SAR or using a different field strength does
not eliminate the risk. The only safe course is to avoid the MRI and consult
the cardiologist to determine if an alternative imaging modality (e.g., CT)
is appropriate or if the pacemaker can be safely reprogrammed or replaced
with an MR-conditional device. Option A is incorrect because SAR reduction
does not address the risks from the static field. Option B is incorrect
because ECG monitoring does not prevent device malfunction. Option D is
incorrect because MR-Unsafe applies to all field strengths.
Q2. Which of the following is the primary safety concern associated with the
static magnetic field of an MRI scanner?
A) Heating of implanted devices.
B) The projectile effect on ferromagnetic objects.
C) Peripheral nerve stimulation.
1
, D) Acoustic noise.
Correct Answer: B
Rationale: The static magnetic field (B0) exerts a powerful attractive force
on ferromagnetic objects. This can turn everyday items (e.g., oxygen
cylinders, scissors, keys) into dangerous projectiles, causing serious injury
or death. This is the primary safety concern for anyone entering the scan
room. Option A is incorrect because heating is primarily caused by RF energy,
not the static field. Option C is incorrect because peripheral nerve
stimulation is caused by rapidly switching gradient magnetic fields. Option
D is incorrect because acoustic noise is generated by the gradient coils,
not the static field.
Q3. A patient is referred for an MRI with a history of metal fragments in the eye
from a workplace accident. What is the priority action?
A) Proceed with the scan, as the fragments are likely too small to be a risk.
B) Ask the patient to remove their contact lenses and proceed.
C) Request a skull X-ray or CT to rule out intraocular metallic foreign
bodies.
D) Scan the patient but use a head coil to limit the field of view.
Correct Answer: C
Rationale: Metallic foreign bodies in the eye are an absolute
contraindication for MRI unless proven to be non-ferromagnetic. The strong
magnetic field could cause the fragment to move, potentially leading to
blindness or severe eye damage. A skull X-ray or CT is the standard method to
detect and characterise such fragments. Option A is incorrect because even
small fragments can cause injury. Option B is incorrect because contact
lenses are irrelevant to the risk. Option D is incorrect because the static
field extends throughout the scan room; using a head coil does not reduce the
risk.
Q4. The specific absorption rate (SAR) is a measure of:
A) The strength of the magnetic field.
2
, B) The rate at which RF energy is absorbed by the patient's tissue.
C) The speed of the gradient switching.
D) The loudness of the acoustic noise.
Correct Answer: B
Rationale: SAR quantifies the amount of RF power absorbed per unit mass of
tissue, measured in watts per kilogram (W/kg). It is a critical safety
parameter because excessive RF absorption can cause tissue heating and burns.
Option A is incorrect; magnetic field strength is measured in Tesla. Option C
is incorrect; gradient switching speed relates to dB/dt and peripheral nerve
stimulation. Option D is incorrect; acoustic noise is measured in decibels
and is related to gradient coil vibration.
Q5. A patient is 12 weeks pregnant. The referring doctor has requested an MRI for
a suspected appendicitis. What is the most appropriate course of action?
A) Refuse the scan until after the pregnancy.
B) Perform the scan without any modifications.
C) Consult with the radiologist and referring doctor to confirm the medical
necessity, and if performed, use the lowest SAR settings and limit scan
time.
D) Perform the scan, but only after obtaining a signed consent form from the
patient.
Correct Answer: C
Rationale: MRI is generally avoided in the first trimester unless the
clinical benefit clearly outweighs potential risks. The safety of MRI during
pregnancy is not fully established, particularly regarding RF heating and
acoustic noise. The ALARA (As Low As Reasonably Achievable) principle should
be applied. Consultation with the radiologist and referring doctor is
essential to confirm that MRI is the best diagnostic option. If performed,
use the lowest SAR mode, minimise scan time, and avoid unnecessary
sequences. Option A is too absolute; some urgent conditions may require MRI.
Option B ignores safety precautions. Option D is insufficient; patient
consent does not replace medical justification.
3
, Q6. Which of the following is considered an MR-Conditional implant?
A) A ferromagnetic aneurysm clip.
B) A cochlear implant that has been tested and approved for MRI under
specific conditions.
C) A standard cardiac pacemaker.
D) A metallic splinter in the hand.
Correct Answer: B
Rationale: An MR-Conditional implant is one that has been demonstrated to
pose no known hazard in a specified MRI environment under specified
conditions of use (e.g., static field strength, SAR limits, coil type). A
cochlear implant approved under specific conditions is an example. Option A
is MR-Unsafe. Option C is typically MR-Unsafe unless it is a specifically
designed MR-conditional pacemaker. Option D is a foreign body that must be
evaluated; it is not an implant.
Q7. The "quench" of an MRI magnet refers to:
A) The sudden and rapid loss of superconductivity, causing the helium to
boil off rapidly.
B) The process of ramping the magnet up to full field strength.
C) The daily quality assurance check of the magnet.
D) The acoustic noise generated during a fast scan sequence.
Correct Answer: A
Rationale: A quench occurs when the superconducting wire in the magnet coils
loses its superconductivity, often due to a fault or deliberate emergency
shutdown. This causes a rapid increase in resistance, heating the coils and
causing the liquid helium coolant to boil off violently as gas. The sudden
expansion of helium gas can displace oxygen in the scan room, creating an
asphyxiation hazard. Option B is called ramping. Option C is a QA procedure.
Option D is unrelated to magnet quench.
Q8. In the event of a magnet quench, what is the most critical immediate action
for the technologist?
4
