MRI Insulin Pump Safety Exam Practice
Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. Why must an insulin pump be specifically identified during MRI screening?
A. It can change the MRI room temperature
B. It can interfere with the patient's hearing
C. MRI exposure can affect the device and insulin delivery
D. It always contains a large amount of ferromagnetic material
Correct Answer: C. MRI exposure can affect the device and insulin delivery
Rationale: Insulin pumps contain electronic and mechanical components that may
be affected by the MR environment. Device malfunction can potentially alter
insulin delivery and create a serious medical risk. The ACR emphasizes early
identification of insulin pumps during MR screening.
2. How does the ACR currently characterize external insulin pumps in relation to
MRI?
A. They are universally MR Safe
B. They must be removed before the patient enters the MR system room
C. They may always remain attached during scanning
D. They are automatically MR Conditional at 1.5 T
Correct Answer: B. They must be removed before the patient enters the MR
system room
,Rationale: The current ACR Manual on MR Safety states that external insulin
pumps must be removed before allowing the patient into the MR system room.
Device-specific manufacturer instructions must also be considered.
3. What is the primary safety concern if an insulin pump malfunctions during
MRI?
A. Incorrect insulin delivery
B. Increased image brightness
C. Reduced acoustic noise
D. Increased table weight capacity
Correct Answer: A. Incorrect insulin delivery
Rationale: MRI exposure can damage or interfere with insulin-pump electronics or
delivery mechanisms. A resulting interruption or inappropriate delivery of insulin
can cause clinically significant glucose abnormalities.
4. Which MRI hazard is most directly relevant to ferromagnetic components in
an insulin pump?
A. Acoustic noise
B. Gradient-induced peripheral nerve stimulation
C. Static magnetic field
D. Contrast-agent osmolality
Correct Answer: C. Static magnetic field
Rationale: The static magnetic field can exert forces or torques on ferromagnetic
materials and can also interfere with electronic or mechanical components. The
MR environment therefore requires careful control of devices entering the scanner
room.
5. What should a technologist do when a patient reports wearing an insulin
pump?
,A. Assume it is MR Conditional
B. Ask the patient to place it in the scanner bore
C. Verify the device and follow applicable MR-safety instructions
D. Ignore the pump if the patient has used it during previous imaging
Correct Answer: C. Verify the device and follow applicable MR-safety
instructions
Rationale: Device identity and model-specific safety information should be
established rather than relying on assumptions or previous uneventful
examinations. Prior exposure without an apparent problem does not establish
future MRI safety.
6. Why is the statement “the pump was exposed to MRI before and nothing
happened” insufficient to establish safety?
A. MRI scanners cannot produce magnetic fields twice
B. Previous uneventful exposure does not establish that the device is safe
C. Insulin pumps become MR Safe after one scan
D. The pump becomes nonfunctional after every MRI
Correct Answer: B. Previous uneventful exposure does not establish that the
device is safe
Rationale: MR safety depends on the specific device, its labeling, and the
conditions of exposure. A previous uneventful examination does not demonstrate
that an unidentified or non-approved device is safe in a future MRI examination.
7. Which type of information is most important when identifying an insulin
pump for MRI screening?
A. Pump manufacturer and specific model
B. Patient's favorite insulin brand
C. Patient's preferred MRI music
D. Date of the patient's last meal
Correct Answer: A. Pump manufacturer and specific model
, Rationale: MR safety information is device-specific. Manufacturer and model
identification allows the MR team to determine the applicable safety instructions
and restrictions.
8. What does the term “MR Unsafe” indicate?
A. The device can be scanned only at 3 T
B. The device is safe if the patient remains still
C. The device presents unacceptable risk in the MR environment
D. The device requires only a shorter scan
Correct Answer: C. The device presents unacceptable risk in the MR
environment
Rationale: “MR Unsafe” identifies an object or device that presents unacceptable
risk in the MR environment. It should not be brought into the MR environment
under ordinary circumstances.
9. Which classification means that a device may be used in MRI only when
specified conditions are satisfied?
A. MR Safe
B. MR Conditional
C. MR Unsafe
D. MR Exempt
Correct Answer: B. MR Conditional
Rationale: MR Conditional means that the device can be safely used in the MR
environment only under defined conditions. Those conditions may include field
strength, spatial gradient, RF exposure, positioning, or other requirements.
10. Which statement best describes an MR Safe device?
A. It is safe only at 1.5 T
B. It can be used only outside Zone IV
Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. Why must an insulin pump be specifically identified during MRI screening?
A. It can change the MRI room temperature
B. It can interfere with the patient's hearing
C. MRI exposure can affect the device and insulin delivery
D. It always contains a large amount of ferromagnetic material
Correct Answer: C. MRI exposure can affect the device and insulin delivery
Rationale: Insulin pumps contain electronic and mechanical components that may
be affected by the MR environment. Device malfunction can potentially alter
insulin delivery and create a serious medical risk. The ACR emphasizes early
identification of insulin pumps during MR screening.
2. How does the ACR currently characterize external insulin pumps in relation to
MRI?
A. They are universally MR Safe
B. They must be removed before the patient enters the MR system room
C. They may always remain attached during scanning
D. They are automatically MR Conditional at 1.5 T
Correct Answer: B. They must be removed before the patient enters the MR
system room
,Rationale: The current ACR Manual on MR Safety states that external insulin
pumps must be removed before allowing the patient into the MR system room.
Device-specific manufacturer instructions must also be considered.
3. What is the primary safety concern if an insulin pump malfunctions during
MRI?
A. Incorrect insulin delivery
B. Increased image brightness
C. Reduced acoustic noise
D. Increased table weight capacity
Correct Answer: A. Incorrect insulin delivery
Rationale: MRI exposure can damage or interfere with insulin-pump electronics or
delivery mechanisms. A resulting interruption or inappropriate delivery of insulin
can cause clinically significant glucose abnormalities.
4. Which MRI hazard is most directly relevant to ferromagnetic components in
an insulin pump?
A. Acoustic noise
B. Gradient-induced peripheral nerve stimulation
C. Static magnetic field
D. Contrast-agent osmolality
Correct Answer: C. Static magnetic field
Rationale: The static magnetic field can exert forces or torques on ferromagnetic
materials and can also interfere with electronic or mechanical components. The
MR environment therefore requires careful control of devices entering the scanner
room.
5. What should a technologist do when a patient reports wearing an insulin
pump?
,A. Assume it is MR Conditional
B. Ask the patient to place it in the scanner bore
C. Verify the device and follow applicable MR-safety instructions
D. Ignore the pump if the patient has used it during previous imaging
Correct Answer: C. Verify the device and follow applicable MR-safety
instructions
Rationale: Device identity and model-specific safety information should be
established rather than relying on assumptions or previous uneventful
examinations. Prior exposure without an apparent problem does not establish
future MRI safety.
6. Why is the statement “the pump was exposed to MRI before and nothing
happened” insufficient to establish safety?
A. MRI scanners cannot produce magnetic fields twice
B. Previous uneventful exposure does not establish that the device is safe
C. Insulin pumps become MR Safe after one scan
D. The pump becomes nonfunctional after every MRI
Correct Answer: B. Previous uneventful exposure does not establish that the
device is safe
Rationale: MR safety depends on the specific device, its labeling, and the
conditions of exposure. A previous uneventful examination does not demonstrate
that an unidentified or non-approved device is safe in a future MRI examination.
7. Which type of information is most important when identifying an insulin
pump for MRI screening?
A. Pump manufacturer and specific model
B. Patient's favorite insulin brand
C. Patient's preferred MRI music
D. Date of the patient's last meal
Correct Answer: A. Pump manufacturer and specific model
, Rationale: MR safety information is device-specific. Manufacturer and model
identification allows the MR team to determine the applicable safety instructions
and restrictions.
8. What does the term “MR Unsafe” indicate?
A. The device can be scanned only at 3 T
B. The device is safe if the patient remains still
C. The device presents unacceptable risk in the MR environment
D. The device requires only a shorter scan
Correct Answer: C. The device presents unacceptable risk in the MR
environment
Rationale: “MR Unsafe” identifies an object or device that presents unacceptable
risk in the MR environment. It should not be brought into the MR environment
under ordinary circumstances.
9. Which classification means that a device may be used in MRI only when
specified conditions are satisfied?
A. MR Safe
B. MR Conditional
C. MR Unsafe
D. MR Exempt
Correct Answer: B. MR Conditional
Rationale: MR Conditional means that the device can be safely used in the MR
environment only under defined conditions. Those conditions may include field
strength, spatial gradient, RF exposure, positioning, or other requirements.
10. Which statement best describes an MR Safe device?
A. It is safe only at 1.5 T
B. It can be used only outside Zone IV
