Radiology - MRI Safety

16 Questions | Total Attempts: 547

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MRI Safety Quizzes & Trivia

As you probably could have guessed, the science of radiology can be quite harmful to the human body given the high levels of radiation involved. What are the proper safety measures when handling an MRI? Let’s find out.


Questions and Answers
  • 1. 
    Name: 
  • 2. 
    A subject checks the box that they have tattoos, the next step is to: 
    • A. 

      Cancel the study, tattoos are never allowed in the scanner

    • B. 

      Wrap the tattoo in a cold compress and continue with the study

    • C. 

      Nothing, tattoos are fine

    • D. 

      Explain that in rare cases tattoos can tingle or burn and let them know if they are not comfortable in continuing they can back out of the study

  • 3. 
    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

  • 4. 
    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?

  • 5. 
    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 are the safety concerns?
    • A. 

      Asphyxiation and frost bite

    • B. 

      Explosion

    • C. 

      Convulsion

    • D. 

      Fire

  • 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. 
    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

  • 8. 
    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

  • 9. 
    The magnetic field is contained entirely in the center of the bore, it does not extend to the outside environment
    • A. 

      True

    • B. 

      False

  • 10. 
    The main hazard of the Static Field is:
    • A. 

      Nerve Stimulation

    • B. 

      Objects becoming projectiles

    • C. 

      Heat Deposition

    • D. 

      None of the above

  • 11. 
    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

  • 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. 
    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

  • 14. 
    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

  • 15. 
    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

  • 16. 
    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

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