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MRI Study Questions Part 4

Quiz by Bethany Sewell

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115 questions
Show answers
  • Q1

    What zone is intended for screened MRI patients?

    Question Image

    Zone 3

    Zone 1

    Zone 4

    Zone 2

    30s
  • Q2

    What zone is intended for screened patients under direct supervision?

    Question Image

    Zone 2

    Zone 3

    Zone 1

    Zone 4

    30s
  • Q3

    What magnetic field is the MR technologist most exposed to?

    RF

    Static Magnetic Fields

    30s
  • Q4

    The FDA regulates the magnetic field strength for populations. The magnetic strength for the entire population should not exceed what?

    4 Gauss

    8 Tesla

    4 Tesla 

    4 Gauss

    30s
  • Q5

    The FDA regulates the magnetic field strength for populations. The magnetic strength for those over 1 mo of age should not exceed what?

    4 Gauss

    8 Tesla 

    4 Tesla 

    8 Gauss

    30s
  • Q6

    The strength of the isocenter of the bore is measured in what?

    Tesla 

    Guass

    30s
  • Q7

    The strength of the periphery of the bore is measure in what?

    Gauss

    Tesla

    30s
  • Q8

    What type of shielding is used within the scanner presenting as superconducting windings, reducing the fringe magnetic field?

    Question Image

    Passive shielding 

    Active shielding

    30s
  • Q9

    What type of shielding Is used to line the room walls with steel?

    Question Image

    passive shielding 

    active shielding 

    30s
  • Q10

    What type of shielding is used to line the room walls with copper?

    Question Image

    RF shielding 

    passive shielding 

    30s
  • Q11

    FDA safety levels for RF exposure during MR exams are defined as?

     SAR restrictions

    Tesla restrictions

    Heating restrictions 

    30s
  • Q12

    FDA guidelines of a level of concern when RF absorption increases the body temperature by how much?

    2* F

    1* F

    2 * Celsius

     1* Celsius

    30s
  • Q13

    What is a risk factor for increased SAR levels?

    kyphosis 

    anorexia

     Hypertension

    30s
  • Q14

    Biological effects can occur with RF, by thermal and tissue heating.

    true
    false
    True or False
    30s
  • Q15

    Doubling the flip angle will do what to RF absorption?

    Decrease it by a factor of 2

    Increase it by a factor of 2

     Increase it by a factor of 4

    Decrease it by a factor of 4

    30s

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