MRI Aneurysm Clip Safety Exam
Practice Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. What is the primary MRI safety concern associated with a ferromagnetic
intracranial aneurysm clip?
A. Excessive acoustic noise
B. Image distortion only
C. Magnetically induced displacement or torque
D. Reduced gradient performance
Correct Answer: C. Magnetically induced displacement or torque
Ferromagnetic aneurysm clips can experience translational force and rotational
torque in the static magnetic field. These forces can potentially move or rotate the
clip and cause serious injury.
2. What is the most important first step when a patient reports having an
intracranial aneurysm clip?
A. Determine the patient's blood pressure
B. Establish the clip's identity and MR safety status
C. Place the patient immediately in the scanner
D. Perform a routine MRI sequence
Correct Answer: B. Establish the clip's identity and MR safety status
The clip must be positively identified and its MR safety labeling verified before the
patient undergoes MRI. A patient's recollection alone is not sufficient evidence of
MR conditionality.
,3. Which source can provide useful documentation about an implanted
aneurysm clip?
A. Operative report
B. Patient's clothing label
C. MRI room warning sign
D. Scanner console password
Correct Answer: A. Operative report
An operative report may identify the clip manufacturer, model, implantation date,
and other information needed to establish MR safety.
4. Why is the exact model of an aneurysm clip important for MRI screening?
A. Different clip models can have different MR safety characteristics
B. All aneurysm clips have identical magnetic properties
C. The model determines the patient's age
D. The model determines MRI room temperature
Correct Answer: A. Different clip models can have different MR safety
characteristics
MR safety cannot be inferred simply from the fact that an object is called an
aneurysm clip. Specific materials, designs, and models can have different MR
labeling and magnetic behavior.
5. Which MR labeling category indicates that an aneurysm clip may be scanned
only under specified conditions?
A. MR Unsafe
B. MR Conditional
C. MR Exempt
D. MR Unclassified-Safe
Correct Answer: B. MR Conditional
,MR Conditional means that the device has been demonstrated to be safe only
when specified conditions are satisfied. These may include field strength, RF
exposure, spatial-gradient limits, and other parameters.
6. What does an MR Unsafe designation mean for an aneurysm clip?
A. It may be scanned at any field strength
B. It is safe only at 7 T
C. It should not be brought into the MR environment under the applicable
labeling
D. It requires only additional padding
Correct Answer: C. It should not be brought into the MR environment under the
applicable labeling
MR Unsafe indicates that the item poses an unacceptable MR hazard under the
applicable classification and should not be introduced into the MR environment.
7. Which physical property is particularly important when evaluating an
aneurysm clip for magnetic interaction?
A. Ferromagnetism
B. Electrical resistance of the scanner table
C. Patient body temperature
D. Acoustic impedance of the room
Correct Answer: A. Ferromagnetism
Ferromagnetic materials can experience significant forces and torque in an MRI
magnetic field, making material composition an important part of clip safety
evaluation.
8. What is magnetic translational force?
A. A force that can pull a magnetic object toward a region of stronger magnetic
field
, B. Rotation of the RF coil
C. Vibration caused by acoustic noise
D. Heating caused by gradient switching
Correct Answer: A. A force that can pull a magnetic object toward a region of
stronger magnetic field
Translational force acts on an object within a magnetic-field gradient and can
cause movement toward regions of greater magnetic-field strength.
9. What is magnetically induced torque?
A. A force that causes an object to rotate toward magnetic alignment
B. A temperature increase caused by RF energy
C. A gradient-induced sound wave
D. A change in patient positioning caused by the table
Correct Answer: A. A force that causes an object to rotate toward magnetic
alignment
Torque can act on an implanted magnetic object and attempt to rotate it into
alignment with the magnetic field.
10. Why can magnetic torque be especially important for an intracranial
aneurysm clip?
A. Rotation may stress or disturb tissue surrounding the clip
B. Torque always improves image quality
C. Torque reduces the static magnetic field
D. Torque prevents RF transmission
Correct Answer: A. Rotation may stress or disturb tissue surrounding the clip
An intracranial clip is attached to vascular tissue, so magnetically induced rotation
could potentially cause mechanical injury.
11. Which information is most useful for positively identifying an aneurysm clip?
Practice Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. What is the primary MRI safety concern associated with a ferromagnetic
intracranial aneurysm clip?
A. Excessive acoustic noise
B. Image distortion only
C. Magnetically induced displacement or torque
D. Reduced gradient performance
Correct Answer: C. Magnetically induced displacement or torque
Ferromagnetic aneurysm clips can experience translational force and rotational
torque in the static magnetic field. These forces can potentially move or rotate the
clip and cause serious injury.
2. What is the most important first step when a patient reports having an
intracranial aneurysm clip?
A. Determine the patient's blood pressure
B. Establish the clip's identity and MR safety status
C. Place the patient immediately in the scanner
D. Perform a routine MRI sequence
Correct Answer: B. Establish the clip's identity and MR safety status
The clip must be positively identified and its MR safety labeling verified before the
patient undergoes MRI. A patient's recollection alone is not sufficient evidence of
MR conditionality.
,3. Which source can provide useful documentation about an implanted
aneurysm clip?
A. Operative report
B. Patient's clothing label
C. MRI room warning sign
D. Scanner console password
Correct Answer: A. Operative report
An operative report may identify the clip manufacturer, model, implantation date,
and other information needed to establish MR safety.
4. Why is the exact model of an aneurysm clip important for MRI screening?
A. Different clip models can have different MR safety characteristics
B. All aneurysm clips have identical magnetic properties
C. The model determines the patient's age
D. The model determines MRI room temperature
Correct Answer: A. Different clip models can have different MR safety
characteristics
MR safety cannot be inferred simply from the fact that an object is called an
aneurysm clip. Specific materials, designs, and models can have different MR
labeling and magnetic behavior.
5. Which MR labeling category indicates that an aneurysm clip may be scanned
only under specified conditions?
A. MR Unsafe
B. MR Conditional
C. MR Exempt
D. MR Unclassified-Safe
Correct Answer: B. MR Conditional
,MR Conditional means that the device has been demonstrated to be safe only
when specified conditions are satisfied. These may include field strength, RF
exposure, spatial-gradient limits, and other parameters.
6. What does an MR Unsafe designation mean for an aneurysm clip?
A. It may be scanned at any field strength
B. It is safe only at 7 T
C. It should not be brought into the MR environment under the applicable
labeling
D. It requires only additional padding
Correct Answer: C. It should not be brought into the MR environment under the
applicable labeling
MR Unsafe indicates that the item poses an unacceptable MR hazard under the
applicable classification and should not be introduced into the MR environment.
7. Which physical property is particularly important when evaluating an
aneurysm clip for magnetic interaction?
A. Ferromagnetism
B. Electrical resistance of the scanner table
C. Patient body temperature
D. Acoustic impedance of the room
Correct Answer: A. Ferromagnetism
Ferromagnetic materials can experience significant forces and torque in an MRI
magnetic field, making material composition an important part of clip safety
evaluation.
8. What is magnetic translational force?
A. A force that can pull a magnetic object toward a region of stronger magnetic
field
, B. Rotation of the RF coil
C. Vibration caused by acoustic noise
D. Heating caused by gradient switching
Correct Answer: A. A force that can pull a magnetic object toward a region of
stronger magnetic field
Translational force acts on an object within a magnetic-field gradient and can
cause movement toward regions of greater magnetic-field strength.
9. What is magnetically induced torque?
A. A force that causes an object to rotate toward magnetic alignment
B. A temperature increase caused by RF energy
C. A gradient-induced sound wave
D. A change in patient positioning caused by the table
Correct Answer: A. A force that causes an object to rotate toward magnetic
alignment
Torque can act on an implanted magnetic object and attempt to rotate it into
alignment with the magnetic field.
10. Why can magnetic torque be especially important for an intracranial
aneurysm clip?
A. Rotation may stress or disturb tissue surrounding the clip
B. Torque always improves image quality
C. Torque reduces the static magnetic field
D. Torque prevents RF transmission
Correct Answer: A. Rotation may stress or disturb tissue surrounding the clip
An intracranial clip is attached to vascular tissue, so magnetically induced rotation
could potentially cause mechanical injury.
11. Which information is most useful for positively identifying an aneurysm clip?
