Magnetic Resonance Safety Expert (Mrse) Exam - Complete Questions And Detailed Solutions Latest Update This Year Just Released

MAGNETIC RESONANCE SAFETY EXPERT (MRSE) EXAM - COMPLETE
QUESTIONS AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED



Question 1: Which of the following are considered biological
effects of the static magnetic field?

1. Rotational forces
2. Magnetohydrodynamic effect
3. All of the choices
4. Translational forces
Answer:

2. Magnetohydrodynamic effect


Question 2: A patient starts twitching during a diffusion-weighted
image but not during any other sequences. When questioned, they
say that they are holding still. What may be happening?

1. The patient may be experiencing peripheral nerve stimulation
2. The patient is definitely lying to you
3. The patient has Parkinson's disease
4. Patient has dementia
Answer:

1. The patient may be experiencing peripheral nerve stimulation


Question 3: A patient is advanced through the MRI scanner bore
very quickly and experiences the sensation of flashing lights in
their visual field. What are they experiencing?

1. Heating

,2. Magnetohydrodynamic effect
3. Nystagmus
4. Magnetophosphenes
Answer:

4. Magnetophosphenes


Question 4: The magnetohydrodynamic effect explains artifacts
seen where in the cardiac cycle?

1. R wave
2. T wave
3. QRS complex
4. P wave
Answer:

2. T wave

Due to flow potentials caused by moving blood, artifacts in ECG can
arise and cause an elevation of the T wave of the cardiac cycle in
patients in the static magnetic field. This causes no harm to a
patient and upon leaving the static magnetic field, the T wave will
return to normal.


Question 5: Heating is common in which of the following? Select all
that apply.

1. The end of an insulated wire
2. In areas outside the RF field
3. In round small objects
4. In devices with sharp points or edges
Answer:

, 4. In devices with sharp points or edges


Question 6: The T wave in the cardiac cycle represents what?

1. Heart depolarization
2. Arrhythmia
3. Heart repolarization
4. None of the choices
Answer:

3. Heart repolarization


Question 7: The QRS complex demonstrates heart contraction
(ventricular depolarization) in the cardiac cycle. The T wave
represents the repolarization of the heart.

What is the purpose of the static magnetic field?

1. To align hydrogen nuclei parallel and anti-parallel to B0
2. To reverse the spin of the hydrogen nuclei
3. To produce currents in tissues containing hydrogen nuclei
4. To measure the movement of hydrogen nuclei
Answer:

1. To align hydrogen nuclei parallel and anti-parallel to B0


Question 8: A deflection of 45 degrees in a tested implant indicates
that it deflects at a force equal to what?

1. 2 gravity force
2. 0.25 gravity force
3. 1 gravity force

, 4. 0.5 gravity force
Answer:

3. 1 gravity force

Deflection angle describes the magnitude of the translational
magnetic force on an object. If an implant in the static field is
suspended by a string and deflects 45 degrees that means that the
translational forces acting on the object are equal to the force of
gravity. Lower deflection angles mean the force of gravity is
stronger than the translational force and higher deflection angles
indicate that the translational force is greater.Since we are
experiencing 1 gravity force at rest. A deflection of 45 degrees
indicates the translation force is equal to 1G.


Question 9: What is nystagmus?

1. Involuntary coughing and sneezing
2. Vision loss
3. Experience different scents that are not really there
4. Involuntary movement of the eyes from side to side
Answer:

4. Involuntary movement of the eyes from side to side


Question 10: Which of the following contributes to patient heating?
Select all that apply.

1. Pulse sequence
2. Body size
3. Surface area
4. All of the above