MRI Medical Device Safety Certification
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Domain 1: MRI Medical Device Classification and Fundamental Hazards
1. Which MRI safety classification indicates that a medical device poses no
known hazards in any MR environment?
A. MR Conditional
B. MR Unsafe
C. MR Safe
D. MR Limited
Correct Answer: C. MR Safe
Rationale: An MR Safe device is considered safe in all MR environments because it
is made from materials that pose no known MR-related hazards. Unlike an MR
Conditional device, it has no specified MR-environment conditions that must be
satisfied.
2. What does the designation MR Conditional mean?
A. The device can enter any MRI environment without restriction
B. The device may be used safely only when specified conditions are satisfied
C. The device must never enter an MRI environment
D. The device contains no electrically conductive material
,Correct Answer: B. The device may be used safely only when specified
conditions are satisfied
Rationale: MR Conditional devices have demonstrated safety only under defined
conditions. Those conditions can include field strength, spatial gradient, RF
exposure, gradient limitations, coil restrictions, and other requirements.
3. What is the appropriate general assumption for a medical device whose MRI
safety status is unknown?
A. It should be treated as MR Safe
B. It should be treated as MR Conditional
C. It should be treated as MR Unsafe until its status is established
D. It should be scanned using the lowest possible SAR
Correct Answer: C. It should be treated as MR Unsafe until its status is
established
Rationale: An unknown device should not be assumed safe simply because it
resembles a device that has MR Conditional labeling. FDA guidance states that
devices without established MR safety information should be assumed unsafe.
4. Which MRI hazard is primarily associated with ferromagnetic materials?
A. Acoustic noise
B. Projectile movement
C. RF signal loss
D. Gradient-induced nerve stimulation
Correct Answer: B. Projectile movement
Rationale: Ferromagnetic objects can experience strong attractive forces toward
the MRI magnet. An object can therefore become a projectile if brought into the
magnetic field without appropriate screening and control.
5. Which MRI mechanism can cause heating of a conductive medical device?
,A. RF energy
B. Visible light
C. Static room temperature
D. Patient respiration
Correct Answer: A. RF energy
Rationale: RF energy can induce currents in conductive device components and
surrounding tissues. Under certain conditions, this can result in localized heating
and potential tissue injury.
6. Which MRI field can produce displacement force and torque on susceptible
medical devices?
A. Static magnetic field
B. RF field only
C. Acoustic field
D. Gradient field only
Correct Answer: A. Static magnetic field
Rationale: The static B0 field can exert translational force and torque on magnetic
materials. These effects are important considerations for implants and other
devices containing magnetic or ferromagnetic components.
7. Which hazard is particularly relevant to electrically active implanted devices?
A. Device malfunction
B. Reduced room lighting
C. Patient dehydration
D. Reduced oxygen concentration in the bore
Correct Answer: A. Device malfunction
Rationale: MRI electromagnetic fields can interfere with electrically active medical
devices. Depending on the device, this may affect sensing, programming, therapy
delivery, or other functions.
, 8. Which statement best describes a major concern associated with long
conductive components during MRI?
A. They can couple with RF or time-varying magnetic fields
B. They always become magnetically invisible
C. They prevent all image formation
D. They eliminate gradient fields
Correct Answer: A. They can couple with RF or time-varying magnetic fields
Rationale: Long conductive structures can interact with electromagnetic fields and
develop induced voltages or currents. Depending on their configuration, these
effects can contribute to heating or unintended electrical stimulation.
Domain 2: Device Identification and MRI Screening
9. What is the most important first step when a patient reports an implanted
medical device?
A. Assume the device is MR Conditional
B. Positively identify the device and its components
C. Reduce the scanner's field strength
D. Remove the patient's clothing
Correct Answer: B. Positively identify the device and its components
Rationale: MRI safety depends on the specific device and configuration. Positive
identification allows the MRI team to determine the applicable safety
classification and conditions.
10. Which document can provide useful information for identifying an
implanted device and its MRI status?
A. Patient medical device card
B. Driver's license
Exam Practice Questions and Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
Domain 1: MRI Medical Device Classification and Fundamental Hazards
1. Which MRI safety classification indicates that a medical device poses no
known hazards in any MR environment?
A. MR Conditional
B. MR Unsafe
C. MR Safe
D. MR Limited
Correct Answer: C. MR Safe
Rationale: An MR Safe device is considered safe in all MR environments because it
is made from materials that pose no known MR-related hazards. Unlike an MR
Conditional device, it has no specified MR-environment conditions that must be
satisfied.
2. What does the designation MR Conditional mean?
A. The device can enter any MRI environment without restriction
B. The device may be used safely only when specified conditions are satisfied
C. The device must never enter an MRI environment
D. The device contains no electrically conductive material
,Correct Answer: B. The device may be used safely only when specified
conditions are satisfied
Rationale: MR Conditional devices have demonstrated safety only under defined
conditions. Those conditions can include field strength, spatial gradient, RF
exposure, gradient limitations, coil restrictions, and other requirements.
3. What is the appropriate general assumption for a medical device whose MRI
safety status is unknown?
A. It should be treated as MR Safe
B. It should be treated as MR Conditional
C. It should be treated as MR Unsafe until its status is established
D. It should be scanned using the lowest possible SAR
Correct Answer: C. It should be treated as MR Unsafe until its status is
established
Rationale: An unknown device should not be assumed safe simply because it
resembles a device that has MR Conditional labeling. FDA guidance states that
devices without established MR safety information should be assumed unsafe.
4. Which MRI hazard is primarily associated with ferromagnetic materials?
A. Acoustic noise
B. Projectile movement
C. RF signal loss
D. Gradient-induced nerve stimulation
Correct Answer: B. Projectile movement
Rationale: Ferromagnetic objects can experience strong attractive forces toward
the MRI magnet. An object can therefore become a projectile if brought into the
magnetic field without appropriate screening and control.
5. Which MRI mechanism can cause heating of a conductive medical device?
,A. RF energy
B. Visible light
C. Static room temperature
D. Patient respiration
Correct Answer: A. RF energy
Rationale: RF energy can induce currents in conductive device components and
surrounding tissues. Under certain conditions, this can result in localized heating
and potential tissue injury.
6. Which MRI field can produce displacement force and torque on susceptible
medical devices?
A. Static magnetic field
B. RF field only
C. Acoustic field
D. Gradient field only
Correct Answer: A. Static magnetic field
Rationale: The static B0 field can exert translational force and torque on magnetic
materials. These effects are important considerations for implants and other
devices containing magnetic or ferromagnetic components.
7. Which hazard is particularly relevant to electrically active implanted devices?
A. Device malfunction
B. Reduced room lighting
C. Patient dehydration
D. Reduced oxygen concentration in the bore
Correct Answer: A. Device malfunction
Rationale: MRI electromagnetic fields can interfere with electrically active medical
devices. Depending on the device, this may affect sensing, programming, therapy
delivery, or other functions.
, 8. Which statement best describes a major concern associated with long
conductive components during MRI?
A. They can couple with RF or time-varying magnetic fields
B. They always become magnetically invisible
C. They prevent all image formation
D. They eliminate gradient fields
Correct Answer: A. They can couple with RF or time-varying magnetic fields
Rationale: Long conductive structures can interact with electromagnetic fields and
develop induced voltages or currents. Depending on their configuration, these
effects can contribute to heating or unintended electrical stimulation.
Domain 2: Device Identification and MRI Screening
9. What is the most important first step when a patient reports an implanted
medical device?
A. Assume the device is MR Conditional
B. Positively identify the device and its components
C. Reduce the scanner's field strength
D. Remove the patient's clothing
Correct Answer: B. Positively identify the device and its components
Rationale: MRI safety depends on the specific device and configuration. Positive
identification allows the MRI team to determine the applicable safety
classification and conditions.
10. Which document can provide useful information for identifying an
implanted device and its MRI status?
A. Patient medical device card
B. Driver's license
