MRSO FINAL PAPER REVIEW GUIDE WITH
VERIFIED ITEMS AND SOLUTION
WALKTHROUGH
●● What is the FDA SAR limit for the whole body in first level
controlled operating mode?
a. 8 W/kg for 15 mins
b. 4 W/kg for 15 mins
c. 3 W/kg for 10 mins
d. 7 W/kg for 20 mins
Answer: b. 4 W/kg for 15 mins
●● Gadolinium contains what kind of magnetism?
a. Diamagnetic
b. Paramagnetic
c. Ferromagnetic
d. Super paramagnetic
Answer: b. Paramagnetic
●● Where will peripheral nerve stimulation be the strongest?
a. Further away from isocenter in the gantry
,b. At the level of the table when it is advanced
c. At isocenter
d. Outside the gantry near the 5 gauss line
Answer: a. Further away from the isocenter in the gantry
●● What is the name for the direction of the vector of the static magnetic
field?
a. Inverse field
b. Equilibrium
c. B0
d. B1
Answer: c. B0
●● An object that produces a weakly repulsive force in the presence of a
strong magnetic field is called what?
a. Superparamagnetic
b. Ferromagnetic
c. Diamagnetic
d. Paramagnetic
Answer: c. Diamagnetic
●● The gradient coils are responsible for which of the following? Select
all that apply.
,a. Heating
b. Rotational force
c. Translational force
d. Magnetohydrodynamic effect
e. Noise
f. Peripheral nerve stimulation
Answer: e. Noise
f. Peripheral nerve stimulation
●● Why is magnetic shielding used in an MR unit?
a. To reduce heating
b. To reduce the e-fields
c. To maintain field homogeneity
d. To limit the fringe field
Answer: d. To limit the fringe field
●● Contrast media will do what to our tissue?
a. Shorten T1 relaxation times
b. Shorten T1 & T2 relaxation times
c. Increase T2 relaxation times and decrease T1 relaxation times
, d. Shorten T2 relaxation times
Answer: b. Shorten T1 & T2 relaxation times
●● As blood flows through a vessel, currents can be induced. The degree
of this is called?
a. Magnetophosphenes
b. Flow potential
c. Translational forces
d. Fringe field
Answer: b. Flow potential
●● The T-wave in the cardiac cycle represents what?
a. Heart repolarization
b. Heart depolarization
c. None of the choices
d. Arrhythmia
Answer: a. Heart repolarization
●● NSF is caused by what?
VERIFIED ITEMS AND SOLUTION
WALKTHROUGH
●● What is the FDA SAR limit for the whole body in first level
controlled operating mode?
a. 8 W/kg for 15 mins
b. 4 W/kg for 15 mins
c. 3 W/kg for 10 mins
d. 7 W/kg for 20 mins
Answer: b. 4 W/kg for 15 mins
●● Gadolinium contains what kind of magnetism?
a. Diamagnetic
b. Paramagnetic
c. Ferromagnetic
d. Super paramagnetic
Answer: b. Paramagnetic
●● Where will peripheral nerve stimulation be the strongest?
a. Further away from isocenter in the gantry
,b. At the level of the table when it is advanced
c. At isocenter
d. Outside the gantry near the 5 gauss line
Answer: a. Further away from the isocenter in the gantry
●● What is the name for the direction of the vector of the static magnetic
field?
a. Inverse field
b. Equilibrium
c. B0
d. B1
Answer: c. B0
●● An object that produces a weakly repulsive force in the presence of a
strong magnetic field is called what?
a. Superparamagnetic
b. Ferromagnetic
c. Diamagnetic
d. Paramagnetic
Answer: c. Diamagnetic
●● The gradient coils are responsible for which of the following? Select
all that apply.
,a. Heating
b. Rotational force
c. Translational force
d. Magnetohydrodynamic effect
e. Noise
f. Peripheral nerve stimulation
Answer: e. Noise
f. Peripheral nerve stimulation
●● Why is magnetic shielding used in an MR unit?
a. To reduce heating
b. To reduce the e-fields
c. To maintain field homogeneity
d. To limit the fringe field
Answer: d. To limit the fringe field
●● Contrast media will do what to our tissue?
a. Shorten T1 relaxation times
b. Shorten T1 & T2 relaxation times
c. Increase T2 relaxation times and decrease T1 relaxation times
, d. Shorten T2 relaxation times
Answer: b. Shorten T1 & T2 relaxation times
●● As blood flows through a vessel, currents can be induced. The degree
of this is called?
a. Magnetophosphenes
b. Flow potential
c. Translational forces
d. Fringe field
Answer: b. Flow potential
●● The T-wave in the cardiac cycle represents what?
a. Heart repolarization
b. Heart depolarization
c. None of the choices
d. Arrhythmia
Answer: a. Heart repolarization
●● NSF is caused by what?
