1 | P a g e | © copyright 2024/2025 | Grade A+
MRSO-4 Questions & 100% Correct
Answers
The quench vent in the MR room should be inspected by who?
a. facility engineers
b. manufacturer engineers
c. MR tech
d. MRMD
✓ ~~> b. manufacturer engineers
The quench vent outside the MR facility is inspected by who?
a. facility engineers
b. manufacture engineer
c. MR tech
d. MRMD
✓ ~~> a. facility engineers
If a cryogen comes in contact with skin, what will happen?
a. frostbite/necrosis
b. nothing, in its gas form
Master01 | September, 2024/2025 | Latest update
, 2 | P a g e | © copyright 2024/2025 | Grade A+
c. explode
d. combust
✓ ~~> a. frostbite/necrosis
Why is asphyxia a risk associated with a quench malfunction?
a. air is displaced by expanding helium gas
b. helium is flammable so if ignighted, it can burn breathable air.
c. temperatures get so cold that the diaphram contracts
d. the changing magnetic field associated with a quench that induction in
the diaphram to contract.
✓ ~~> a. air is displaced by expanding helium gas
What would we expect to see when a malfunctioned quench causes helium
to leak into the MR room? Select all that apply.
a. decrease in room temperature
b. increase in room temperature
c. decrease in magnetic field strength
d. increase in RF heating
✓ ~~> a. decrease in room temperature
c. decrease in magnetic field strength
Master01 | September, 2024/2025 | Latest update
, 3 | P a g e | © copyright 2024/2025 | Grade A+
A designated MR personnel should be present during a quench if the MRSO
cannot be.
a. True
b. False
✓ ~~> a. True
A conservative approach to breast-feeding after a mother receives
gadolinium contrast is:
a. to continue breast-feeding immediately after receiving an intravenous
injection of gadolinium contrast.
b. to wait 12-24 hrs to breast feed after an intravenous injection of gadolinium
contrast.
c. to pump and dump breastmilk for 48 hrs after an intravenous injection of
gadolinium.
d. to mix formula with breastmilk for 24 hrs after an intravenous injection of
gad.
✓ ~~> b. to wait 12-24 hrs to breast feed after an intravenous injection of
gadolinium contrast.
Master01 | September, 2024/2025 | Latest update
, 4 | P a g e | © copyright 2024/2025 | Grade A+
Gadolinium contrast media is excreted into breastmilk in an unstable non-
water soluble form.
a. true
b. false
✓ ~~> b. false
Approximately how much gadolinium is absorbed by an infant from a mother
who has breastfed them and has received a dose of gadolinium contrast?
a. >1%
b.<0.0004%
c. 0.04%
d. 20%
✓ ~~> b.<0.0004%
Which of the following agents yields the best chance for transmetallation to
occur?
a. linear non-ionic
b. linear ionic
c. macrocyclic non-ionic
d. macrocyclic ionic
Master01 | September, 2024/2025 | Latest update
MRSO-4 Questions & 100% Correct
Answers
The quench vent in the MR room should be inspected by who?
a. facility engineers
b. manufacturer engineers
c. MR tech
d. MRMD
✓ ~~> b. manufacturer engineers
The quench vent outside the MR facility is inspected by who?
a. facility engineers
b. manufacture engineer
c. MR tech
d. MRMD
✓ ~~> a. facility engineers
If a cryogen comes in contact with skin, what will happen?
a. frostbite/necrosis
b. nothing, in its gas form
Master01 | September, 2024/2025 | Latest update
, 2 | P a g e | © copyright 2024/2025 | Grade A+
c. explode
d. combust
✓ ~~> a. frostbite/necrosis
Why is asphyxia a risk associated with a quench malfunction?
a. air is displaced by expanding helium gas
b. helium is flammable so if ignighted, it can burn breathable air.
c. temperatures get so cold that the diaphram contracts
d. the changing magnetic field associated with a quench that induction in
the diaphram to contract.
✓ ~~> a. air is displaced by expanding helium gas
What would we expect to see when a malfunctioned quench causes helium
to leak into the MR room? Select all that apply.
a. decrease in room temperature
b. increase in room temperature
c. decrease in magnetic field strength
d. increase in RF heating
✓ ~~> a. decrease in room temperature
c. decrease in magnetic field strength
Master01 | September, 2024/2025 | Latest update
, 3 | P a g e | © copyright 2024/2025 | Grade A+
A designated MR personnel should be present during a quench if the MRSO
cannot be.
a. True
b. False
✓ ~~> a. True
A conservative approach to breast-feeding after a mother receives
gadolinium contrast is:
a. to continue breast-feeding immediately after receiving an intravenous
injection of gadolinium contrast.
b. to wait 12-24 hrs to breast feed after an intravenous injection of gadolinium
contrast.
c. to pump and dump breastmilk for 48 hrs after an intravenous injection of
gadolinium.
d. to mix formula with breastmilk for 24 hrs after an intravenous injection of
gad.
✓ ~~> b. to wait 12-24 hrs to breast feed after an intravenous injection of
gadolinium contrast.
Master01 | September, 2024/2025 | Latest update
, 4 | P a g e | © copyright 2024/2025 | Grade A+
Gadolinium contrast media is excreted into breastmilk in an unstable non-
water soluble form.
a. true
b. false
✓ ~~> b. false
Approximately how much gadolinium is absorbed by an infant from a mother
who has breastfed them and has received a dose of gadolinium contrast?
a. >1%
b.<0.0004%
c. 0.04%
d. 20%
✓ ~~> b.<0.0004%
Which of the following agents yields the best chance for transmetallation to
occur?
a. linear non-ionic
b. linear ionic
c. macrocyclic non-ionic
d. macrocyclic ionic
Master01 | September, 2024/2025 | Latest update
