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MRSO EXAM 3 WITH QUESTIONS AND ANSWERS
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MRSO EXAM 3 WITH QUESTIONS ANDANSWERS
Which of the following physiologic factors result from an anaphylactic reaction?
Select all that apply.
a. Increased creatinine levels
b. Vasodilation
c. Bronchial smooth muscle contraction.
d. Increased vascular permeability - ANSWER B, C, D
How long does a non-emergent quench typically take?
a. 1 minute.
b. 20 seconds
c. 5-15 mins
d. 2- 4 minutes - ANSWER C. 5-15 mins
An emerging quench will take around a minute.
What causes the roaring sound during a quench?
a. The sound produced by the firing of the wire coils used to heat the cryogen
b. The huge amount of helium boiling off through the quench vent
c. If you hear a loud noise, it means something is wrong and you should evacuate.
,d. The sound of a system shutdown. - ANSWER B. The huge amount of helium
boiling off through the quench vent
Which of the following will lessen the likelihood of a patient burning in a pacing
wire?
a. Place pacing wire outside the RF field.
b. Advance the patient into the scanner head first.
c. Don't scan patients.
d. Place an ice pack on the patient's chest - ANSWER A. Place pacing wire outside
the RF field.
A patient has removed a vagus stimulator but left the leads in and is having an MR
knee conducted using the transmit-receive coil. Is it safe to scan patients for
heating?
a. No
b. Yes, just with heat sinks.
c. Yes
d. Yes, only if the patient weighs less than 200 pounds. - ANSWER C. Yes
Heating occurs exclusively in areas exposed to RF energy. If the implant is not
exposed to RF energy, it will not heat up.
Which of the following is not true?
a. The screening method for both non-MR and MR personnel should be the same.
b. Unscreened patients should not enter Zone III.
, c. The screening method for non-MR and MR personnel should differ.
d. Level 2 workers are responsible for Zone IV - ANSWER c. The screening
method for non-MR and MR personnel should differ.
Which of the following is an accurate statement?
a. A level 1 or 2 individual should be available to assist an MR personnel in Zone
IV in non-emergency situations.
b. All level two personnel are MR technicians.
c. A pregnant patient may not receive an MRI examination.
d. A level 1 personnel can scan a patient to relieve a level 2 staff - ANSWER A. A
level 1 or 2 individual should be available to assist an MR personnel in Zone IV in
non-emergency situations.
Lorenz's force can describe what?
a. Translation Force
b. The sounds heard in an MRI
c. Peripheral nerve stimulation.
d. ANSWER B: Resonance heating. The sounds heard in an MRI
The quick turning on and off of gradient coils produces a torque against the gantry.
What will a contrast medium with high relaxivity perform differently from a
contrast media with lower relativity?
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