Nih Clinical Center, MRI Safety Test

25 Questions | Total Attempts: 42

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Nih Clinical Center, MRI Safety Test


Questions and Answers
  • 1. 
    The major risk of injury or harm due to magnet quench is:
    • A. 

      If the cryogenic helium is not vented outside of the MRI room properly, the helium can displace the oxygen in the room, leading to possible asphyxiation.

    • B. 

      Sudden heating of the magnet may cause burns to patients in the bore.

    • C. 

      Electrocution by arcing of electricity across the main magnet windings.

    • D. 

      Blinding flash of light.

  • 2. 
    When does a patient need to have orbital xrays taken prior to having an MRI?
    • A. 

      When the patient has had any type of eye surgery.

    • B. 

      When the patient has a false eye.

    • C. 

      When the patient has a history of foreign body in the orbit

    • D. 

      Xrays are NEVER a necessary requirement prior to an MRI.

  • 3. 
    When the scanner is off, it is safe to bring items into the room that are ferrous (ie. floor cleaners/vacuums etc).
    • A. 

      True

    • B. 

      False

  • 4. 
    Critical patients (ie. from the ICU) can still be monitored during the MRI exam.
    • A. 

      They can still use the same monitoring equipment that they are connected to.

    • B. 

      This is a false statement. No monitoring is allowed in the MRI scanner.

    • C. 

      Only MRI compatible monitoring can be used.

  • 5. 
    Quench refers to (pick the best answer):
    • A. 

      An emergency procedure that runs the magnetic field to ZERO

    • B. 

      Standard condition that patients complain of after being in a magnetic field for longer than 2 hrs at a time.

    • C. 

      What Gatorade does to thirst

  • 6. 
    People have died as a result of MRI safety measures being neglected.
    • A. 

      True

    • B. 

      False

  • 7. 
    The American College of Radiology has instituted 5 separate safety zones around magnetic environments in order improve the safe use of the device.
    • A. 

      Yes

    • B. 

      No, there are only 3 Safety Zones.

    • C. 

      No, there are only 4 Safety Zones.

  • 8. 
    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. 

      Explosion

    • B. 

      Asphyxiation and Frost Bite

    • C. 

      Fire

    • D. 

      Convulsions

  • 9. 
       Who needs to be cleared before they enter the MRI scanning room (pick the best answer)?
    • A. 

      The MRI Technologist

    • B. 

      The Nurse

    • C. 

      Everyone

    • D. 

      The patient

  • 10. 
    If you are not sure if an item is MRI compatible (or MRI conditional), it is best to:
    • A. 

      Hold onto the device very tightly, and walk it into the magnetic field

    • B. 

      Review the device with the MRI Technologist or Safety officer

    • C. 

      Scan the device based on your personal knowledge

    • D. 

      Scan the device ONLY at the highest field strength

  • 11. 
    A research volunteer tells you they have been scanned many times for clinical reasons so there is no reason to re-evaluate this subject and they are cleared to enter the scanning room.
    • A. 

      True

    • B. 

      False

  • 12. 
    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

  • 13. 
    The main hazard of the Static Field is:
    • A. 

      Heat Deposition

    • B. 

      Nerve Stimulation

    • C. 

      Objects becoming projectiles

    • D. 

      None of these are correct

  • 14. 
    In the event your subject is in some type of medical distress, what is the first thing you should do?
    • A. 

      Bring the crash cart into the scan room, then call 111

    • B. 

      Call 911, and remove the patient from the scanner room immediately

    • C. 

      Call 111, and remove the patient from the scanner room immediately

  • 15. 
    The magnetic field is contained within the center of the bore, it does not extend outside the bore.
    • A. 

      True

    • B. 

      False

  • 16. 
    Our department has a policy for patients with tattoos.  Which describes it best below?
    • A. 

      Wrap the tattoo in a cool, damp compress prior to beginning the MRI

    • B. 

      Do nothing. Tattoos are safe

    • C. 

      Cancel the exam. Patients with tattoos (less than a year old) should NOT be scanned.

    • 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

  • 17. 
    Which of the following is a likely consequence of forgetting to remove your wallet from your pocket before entering the scan room
    • A. 

      There should be no issue

    • B. 

      The wallet may heat up, and cause local burning/heating.

    • C. 

      The ink in US currency has metal flecks, and may become a projectile

    • D. 

      Erasing of all magnetic strips (on bank cards/credit cards) may occur

  • 18. 
    What does SAR measure?
    • A. 

      The magnetic Fringe field

    • B. 

      The amount of RF energy that is deposited into the patient.

    • C. 

      The length of the scan.

    • D. 

      Special Aluminum Requirements

  • 19. 
    When administering IV Gadolinium, the Technologist must be on the look out for RISK factors that would PRECLUDE a patient from getting Gadolinium.  If a patient has any one of these risk factors, a serum creatinine and eGFR must be obtained PRIOR to imaging.  Click on EACH risk factor that the Technologist must look out for:
    • A. 

      Diabetes

    • B. 

      History of Liver or Renal Diseas

    • C. 

      Over the age of 60

    • D. 

      Impotence

    • E. 

      Known history of renal failure

    • F. 

      Patients in renal failure, or on dialysis

  • 20. 
    What is our departmental policy on scanning patients with intravascular STENTS?
    • A. 

      We can only scan patients with stents 6 weeks post implantation.

    • B. 

      We scan all stents, regardless of when they were implanted.

    • C. 

      We can NOT scan patients who have drug eluting stents.

    • D. 

      We can only scan patients with stents 8 weeks post implantation.

  • 21. 
    The best definition for MR safety zone III is
    • A. 

      The interface between the publicly accessible and the strictly controlled regions

    • B. 

      The region that leads to the MR scanner and only MR personnel have access to it.

    • C. 

      All areas that are outside the MR environment and freely accessible to the general public.

    • D. 

      Area that is synonymous with the MR scanner magnet room itself.

  • 22. 
    There are different screening process and screening forms for patients, non-MR personnel and MR personnel.
    • A. 

      True

    • B. 

      False

  • 23. 
    Concerning MR screening, which statement is true?
    • A. 

      Only patients require screening

    • B. 

      Non-MR personnel employees who have been working in the MR environment can be exempted from screening

    • C. 

      Non-emergent patients and research and volunteer subjects are to complete written MR safety screening questionnaires before their introduction to Zone III.

    • D. 

      Everyone needs MRI screening.

  • 24. 
    Concerning external ferromagnetic devices brought into zone III, which statement is true?
    • A. 

      They cannot be brought into zone III at all

    • B. 

      They can still be brought into zone III if they are deemed by MR personnel to be necessary for patient care

    • C. 

      MR personnel should supervise but the person who brings the device is responsible for the safe usage.

    • D. 

      All devices are safe at zone III.

  • 25. 
    Concerning moving a large metallic, but nonferromagnetic oxygen tank that is taken into the scanning room, which statement is true?
    • A. 

      You will still feel a force being applied to the nonmagnetic device due to Lenz's law

    • B. 

      The tank might be heated by the magnetic field.

    • C. 

      That might pose a projectile hazard.

    • D. 

      Since it is nonferromagnetic, there is no concern of MR safety.

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