Stony Brook University Scan Center - MRI Safety Quiz
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Safety training is required for all scanner users new to the center. This involves the review of our MRI Safety, Policies and Procedures presentation, safety video, review of the American College of Radiology White Paper on MR Safety and the following quiz. Once you have finished the quiz please remember to print out your certificate, you will need a copy of this certificate to pass our MRI Safety certification. If you have any questions please feel free to contact us at 631-632-4784.
- 1.The major risk of injury or harm due to a magnet quench is:
- A.
The boiling off of cryogens that creates an asphyxiating steam
- B.
The magnet becomes so warm that it may cause burns to patients in the bore
- C.
There is no danger with a quench. It is how we shut down the machine for repair
- D.
A blinding flash of light
- 2.All of the following statements about the magnet of the MRI scanner are true EXCEPT:
- A.
The magnetic field is extremely powerful
- B.
Large metal objects like floor buffers and oxygen cylinders may be picked up by the field and fly toward the magnet bore at high speeds
- C.
The fringe field is confined to the magnet bore
- D.
The magnet is always on, 24/hrs, 7/days
- 3.Patients with which of the following prosthetic devices may be safely scanned:
- A.
Cardiac pacemaker
- B.
History of having metal flakes in the eye
- C.
Cochlear implant (inner ear prosthetic device)
- D.
Total knee replacement
- 4.The emergency shutdown button should be used to immediately cut power to the scanner electrical system in each of the following situations EXCEPT:
- A.
Loud popping noises and smoke come from the scanner
- B.
Sprinklers go off in scan room, but there is no fire
- C.
Scan room fire
- D.
The subject in the scanner squeezes the emergency ball
- 5.With regard to metal objects in the scan room:
- A.
No metallic objects are allowed in the scan room
- B.
Small objects like hair pins may be attracted by the magnetic field but are too small to constitute a safety risk
- C.
Metallic objects may be tested for ferromagnetism by the technologist with a hand-held magnet; if not ferromagnetic, they may be allowed in the scan room
- D.
Most equipment used in an exam is MRI compatible so there is really no reason to worry about this
- 6.In which of the following situations should you push the “Quench” button:
- A.
A steel oxygen tank was brought into the scan room and has flown across the room and stuck to the magnet, pinning someone’s arm in a painful crush
- B.
Scan room fire
- C.
A janitor has entered the room with a large floor buffing machine which is now stuck to the magnet. No one is hurt, but he can’t pull the machine off the magnet
- D.
All of the above
- 7.Before beginning to scan a subject, you should:
- A.
Clear the patient of all internal and external metals
- B.
Give the subject earplugs and the emergency squeeze ball
- C.
Check lines of remote verbal communication with the subject (from the workstation)
- D.
All of the answers are true
- 8.Which of the following is a likely consequence of forgetting to remove your wallet from your pocket before entering the scan room:
- A.
There will likely be no adverse consequence
- B.
The magnetic stripes on your credit cards and ATM cards are erased
- C.
The wallet will heat up and may cause burns
- D.
Because the ink on US currency is ferromagnetic, your wallet may become a projectile and fly into the magnet bore
- 9.If your patient complains of a body ache, dizziness or anxiety (including claustrophobia) during the middle of the scan, you should:
- A.
Quench the magnet
- B.
Press the Emergency Shut Down Button
- C.
Talk to your patient and remove them from the magnet if they cannot go on
- D.
Ignore their complaints
- 10.Which of the following objects are potential projectiles?
- A.
Watch
- B.
ID badge
- C.
Pencil
- D.
Clipboard
- 11.What is a Quench?
- A.
Total power down of the computer system
- B.
A ramping up of the magnetic field in which all of the cryogens are put into the bore thus making the scanner super conductive
- C.
How the staff shuts the magnet down after hours, to ensure maximum safety
- D.
A rapid boil off of cryogens and ultimate loss of a magnetic field
- 12.There are two real safety concerns with regard to the magnetic forces and how they interact with ferrous objects. They can be described as which of the following:
- A.
Translation and Magnetization of the object
- B.
Transverse and Rotation of the object
- C.
Translation and Torque of the object
- D.
Translation and Mutation of the object
- 13.In the event your subject is in some type of medical distress, what is the first thing you should do?
- A.
Call 911 and wait for personnel to arrive
- B.
Bring the crash cart into the scan room
- C.
Nothing
- D.
Call 911, remove the patient from the scanning room immediately
- 14.To reduce the effects of peripheral nerve stimulation:
- A.
Have the subject uncross their extremities
- B.
Use immobilization pads
- C.
Change the subject out of their street clothes and into a gown
- D.
None of the above
- 15.The main hazard of the Static Field is:
- A.
Nerve Stimulation
- B.
Objects becoming projectiles
- C.
Heat Deposition
- D.
None of the above
- 16.If there is ever a Quench in the scan room instead of the outside environment, you must remove the patient and all staff from the room immediately. What is the safety concerns?
- A.
Asphyxiation and frost bite
- B.
Explosion
- C.
Convulsion
- D.
Fire
- 17.What does SAR measure?
- A.
The length of the scan time
- B.
The amount of heat the patient will absorb during the scan
- C.
The strength of the fringe field outside the bore of the magnet
- D.
All of these answers are correct
- 18.What is the unit for measurement of magnetic field strength?
- A.
Gauss
- B.
Tesla
- C.
Both Gauss and Tesla
- D.
None of the above
- 19.If an object is considered safe to be used in a 1.5Tesla MR scanner, but has not been tested in a 3Tesla scanner, it should be labeled as:
- A.
MR Safe
- B.
Not sure, more research should be done
- C.
MR Not Safe
- D.
Does it matter?
- 20.If a volunteer states she could be pregnant you should:
- A.
Let her know there is no known effects to the fetus and continue the exam
- B.
Ignore the information it doesn't matter if she is pregnant or not
- C.
Tell her to come back when her first trimester is over
- D.
Cancel the exam until she can be sure she is not pregnant
- 21.If the operating computer shut down and unplugged, the magnetic field is off and any materials, regardless for their ferromagnetic qualities can be brought into the scanning room.
- A.
True
- B.
False
- 22.What is the strength of the scanned at the SCAN Center?
- A.
1T
- B.
7T
- C.
3T
- D.
1.5T
- 23.If you are not sure the ferromagnetic qualities of an object you should:
- A.
Enter the scanning room slowly until you feel the object start to pull from your grasp
- B.
Check it with a hand held magnet
- C.
Bring the object into the room, if it is attracted to the magnet, turn off the scanner and pull it off the machine
- D.
Nothing from the outside can go into the scanning room
- 24.Every subject can choose if they would like to wear ear plugs, head set, both or nothing during the scan. It's up to each individual.
- A.
True
- B.
False
- 25.Who needs to be cleared before they enter the MRI scanning room?
- A.
The Research Subject
- B.
The Researcher/Research Assistant
- C.
Public Safety Officials (Police/Firemen/EMT)
- D.
The MRI Technologist
- E.
All of the above
- F.
None of the above
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