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MRSO: Exam 4 2024 with Questions & 100% Correct Answers
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MRSO: Exam 4 2024 with Questions & 100% Correct Answers
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MRSO: Exam 4 2024 with Questions &100% Correct Answers
Which of the following describes the translational magnetic field demonstrated to
a patient at a specific location?
a. dB/dt
b. dB/dx
c. dB/dt*B - Answer b. dB/dx
The static magnetic limit for the general public for any body part is set to what?
a. 4T
b. 400 mT
c. 2T
d. 200 mT - Answer b. 400 mT (0.4T)
The quench vent outside the MR facility is inspected by whom?
a. MR tech
b. Manufacturer engineer
c. Facility engineer
d. MRMD - Answer c. Facility engineer
(The quench vent in the MR room is inspected by the manufacturer engineer)
,Peripheral nerve stimulation can be described by which of the following?
a. Faraday's law of induction
b. Ohm's law
c. Lenz's law
d. Planks Law - Answer b. Faraday's law of induction (describes the induction
of electrical current in the presence of a changing magnetic field).
Lenz's force describes the opposing forces created.
Ohm's law deals with the resistance of current along a wire.
Gad contrast has been found in the body in what form? Select all that apply.
a. Water-soluble
b. Non-water soluble - Answer a, b
Which of the following would we expect to be the loudest sequence?
a. GRASS
b. Fast spin echo
c. Conventional gradient sequence
d. FLAIR - Answer a. GRASS
The FLAIR and fast spin echo are considered spin echo sequences; they do not
have extremely fast changing gradient, so will not produce as much noise.
Which of the following has a steeper spatial magnetic gradient?
a. Vertical B0
b. Horizontal B0 - Answer a. Vertical B0
, The strongest gradient strength will reach maximum strength how far from isocenter?
a. 5-20 cm
b. 20-40 cm
c. 30-60 cm
d. 5-15 cm - Answer c. 30-60 cm
Which of the following is true of gad and breastfeeding mothers? Select all that apply.
a. Gad is found in breast milk in a stable and chelated form
b. It is thought that gad contrast may alter the taste of breastmilk.
c. Available data suggests that breastmilk should be pumped and discarded for 24
hours after the IV dose
d. 20% of the intravascular dose would be excreted into the breastmilk within the
first 24 hours. - Answer a, b
Which of the following will influence peripheral nerve stimulation?
a. Static magnetic field
b. Magnetic field at isocenter
c. Patient weight
d. Slew rate - Answer d. Slew rate
Which of the following pulse sequences would we expect to see the least
patient heating?
a. Incoherent gradient
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