1
MRSO (Magnetic Resonance Safety Officer) Exam & Practice
Exam | Newest 2025/2026 | Advanced/Hard Difficulty |
Graded A+
[1] A patient scheduled for an MRI examination reports having a cardiac pacemaker implanted.
According to the FDA labeling system, how should this device be classified?
A. MR Safe
B. MR Conditional
C. MR Unsafe
D. MR Compatible
☑ Correct Answer: C
☑ Explanation: Most traditional cardiac pacemakers are classified as MR Unsafe, meaning
they pose an unacceptable risk in any MR environment. While some newer pacemakers may be
MR Conditional under specific conditions, the question does not provide details about the device
model, so the default classification for a standard pacemaker is MR Unsafe. MR Safe indicates
no known hazards; MR Conditional requires specific conditions for safe scanning.
,2
[2] Which of the following is the primary safety concern associated with the static magnetic
field in MRI?
A. Tissue heating from RF absorption
B. Projectile (missile) effect on ferromagnetic objects
C. Peripheral nerve stimulation
D. Acoustic noise damage
☑ Correct Answer: B
☑ Explanation: The static magnetic field poses a significant projectile (missile) hazard,
where ferromagnetic objects are attracted into the magnet bore with potentially fatal
consequences. Tissue heating is associated with RF fields; peripheral nerve stimulation is
associated with time-varying gradient fields; acoustic noise is associated with gradient
switching.
[3] What is the FDA-approved static magnetic field limit for MR imaging in routine clinical
settings?
A. 0.5 Tesla
B. 1.5 Tesla
,3
C. 3 Tesla
D. 7 Tesla
☑ Correct Answer: C
☑ Explanation: The FDA permits MR systems up to 8 Tesla for adults in clinical use;
however, 3 Tesla is the most commonly used high-field system in routine clinical settings. While
1.5 Tesla is widely used, 3 Tesla is the approved limit commonly referenced. 7 Tesla systems are
primarily used in research settings.
[4] A patient is scheduled for an MRI examination and reports having a cochlear implant. Which
of the following actions should the MRSO take?
A. Proceed with the scan without further inquiry
B. Verify the implant's labeling and safety documentation before proceeding
C. Immediately cancel the examination
D. Perform the scan at 3 Tesla only
☑ Correct Answer: B
☑ Explanation: Cochlear implants may be unsafe in MRI depending on the specific device
, 4
and field strength. The MRSO must verify the implant's labeling (MR Safe, MR Conditional, or
MR Unsafe) and review safety documentation before making a determination. Some cochlear
implants are MR Conditional at specific field strengths, while others are MR Unsafe.
[5] Which MRI safety zone allows unrestricted access to the general public and typically
contains the patient waiting area?
A. Zone I
B. Zone II
C. Zone III
D. Zone IV
☑ Correct Answer: A
☑ Explanation: Zone I is open to the general public with no magnetic field exposure and
contains areas such as the patient waiting area and reception. Zone II is the transition zone;
Zone III is the controlled access zone with magnetic field hazards; Zone IV is the scanner room
itself.
MRSO (Magnetic Resonance Safety Officer) Exam & Practice
Exam | Newest 2025/2026 | Advanced/Hard Difficulty |
Graded A+
[1] A patient scheduled for an MRI examination reports having a cardiac pacemaker implanted.
According to the FDA labeling system, how should this device be classified?
A. MR Safe
B. MR Conditional
C. MR Unsafe
D. MR Compatible
☑ Correct Answer: C
☑ Explanation: Most traditional cardiac pacemakers are classified as MR Unsafe, meaning
they pose an unacceptable risk in any MR environment. While some newer pacemakers may be
MR Conditional under specific conditions, the question does not provide details about the device
model, so the default classification for a standard pacemaker is MR Unsafe. MR Safe indicates
no known hazards; MR Conditional requires specific conditions for safe scanning.
,2
[2] Which of the following is the primary safety concern associated with the static magnetic
field in MRI?
A. Tissue heating from RF absorption
B. Projectile (missile) effect on ferromagnetic objects
C. Peripheral nerve stimulation
D. Acoustic noise damage
☑ Correct Answer: B
☑ Explanation: The static magnetic field poses a significant projectile (missile) hazard,
where ferromagnetic objects are attracted into the magnet bore with potentially fatal
consequences. Tissue heating is associated with RF fields; peripheral nerve stimulation is
associated with time-varying gradient fields; acoustic noise is associated with gradient
switching.
[3] What is the FDA-approved static magnetic field limit for MR imaging in routine clinical
settings?
A. 0.5 Tesla
B. 1.5 Tesla
,3
C. 3 Tesla
D. 7 Tesla
☑ Correct Answer: C
☑ Explanation: The FDA permits MR systems up to 8 Tesla for adults in clinical use;
however, 3 Tesla is the most commonly used high-field system in routine clinical settings. While
1.5 Tesla is widely used, 3 Tesla is the approved limit commonly referenced. 7 Tesla systems are
primarily used in research settings.
[4] A patient is scheduled for an MRI examination and reports having a cochlear implant. Which
of the following actions should the MRSO take?
A. Proceed with the scan without further inquiry
B. Verify the implant's labeling and safety documentation before proceeding
C. Immediately cancel the examination
D. Perform the scan at 3 Tesla only
☑ Correct Answer: B
☑ Explanation: Cochlear implants may be unsafe in MRI depending on the specific device
, 4
and field strength. The MRSO must verify the implant's labeling (MR Safe, MR Conditional, or
MR Unsafe) and review safety documentation before making a determination. Some cochlear
implants are MR Conditional at specific field strengths, while others are MR Unsafe.
[5] Which MRI safety zone allows unrestricted access to the general public and typically
contains the patient waiting area?
A. Zone I
B. Zone II
C. Zone III
D. Zone IV
☑ Correct Answer: A
☑ Explanation: Zone I is open to the general public with no magnetic field exposure and
contains areas such as the patient waiting area and reception. Zone II is the transition zone;
Zone III is the controlled access zone with magnetic field hazards; Zone IV is the scanner room
itself.
