MRSO COMPREHENSIVE QUESTION BANK
WITH TESTED SOLUTIONS AND REVIEW
AIDS
●● Which of the following describe when a non-ferrous object is
repulsed by static magnetic field?
a. Fourier transformation
b. Lenz's force
c. Ohm's law
d. Larmor equation
Answer: b. Lenz's force
●● Which of the following are recommended by the ACR Guidance
document in MR safety 2013 in proper scanning of a patient?
I. Metal detector
II. Ferromagnetic detection system
III. Written screening sheet
IV. Patient gown
a. I, III, IV
b. I, II, III, IV
,c. II, III, IV
d. III
Answer: c. II, III, IV
●● 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
●● Which of the following is true of Zone IV? Select all that apply.
a. This area should be monitored by a level 2 MR personnel
b. Should be noted with signage
, c. Contain metal detectors for implant identification
d. No unsafe implants may cross the 5-gauss unless the implant is
researched and analyzed for risk
Answer: a, b, d
●● 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
●● A patient is advanced in the MRI scanner very quickly and
experiences a sensation of flashing lights in their visual field. What are
they experiencing?
a. Nystagmus
b. Heating
c. Magnetophosphenes
d. Magnetohydrodynamic effect
Answer: c. Magnetophosphenes
WITH TESTED SOLUTIONS AND REVIEW
AIDS
●● Which of the following describe when a non-ferrous object is
repulsed by static magnetic field?
a. Fourier transformation
b. Lenz's force
c. Ohm's law
d. Larmor equation
Answer: b. Lenz's force
●● Which of the following are recommended by the ACR Guidance
document in MR safety 2013 in proper scanning of a patient?
I. Metal detector
II. Ferromagnetic detection system
III. Written screening sheet
IV. Patient gown
a. I, III, IV
b. I, II, III, IV
,c. II, III, IV
d. III
Answer: c. II, III, IV
●● 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
●● Which of the following is true of Zone IV? Select all that apply.
a. This area should be monitored by a level 2 MR personnel
b. Should be noted with signage
, c. Contain metal detectors for implant identification
d. No unsafe implants may cross the 5-gauss unless the implant is
researched and analyzed for risk
Answer: a, b, d
●● 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
●● A patient is advanced in the MRI scanner very quickly and
experiences a sensation of flashing lights in their visual field. What are
they experiencing?
a. Nystagmus
b. Heating
c. Magnetophosphenes
d. Magnetohydrodynamic effect
Answer: c. Magnetophosphenes
