MRSO-4 Exam Questions with Complete Solutions

MRSO-4 Exam Questions with Complete Solutions 100% Verified Correct Answers The quench vent in the MR room should be inspected by who?

• facility engineers
• manufacturer engineers
• MR tech
• MRMD - Correct Answers b. manufacturer engineers

The quench vent outside the MR facility is inspected by who?

• facility engineers
• manufacture engineer
• MR tech
• MRMD - Correct Answers a. facility engineers

If a cryogen comes in contact with skin, what will happen?

• frostbite/necrosis
• nothing, in its gas form
• explode
• combust - Correct Answers a. frostbite/necrosis

Why is asphyxia a risk associated with a quench malfunction?

• air is displaced by expanding helium gas
• helium is flammable so if ignighted, it can burn breathable air.
• temperatures get so cold that the diaphram contracts
• the changing magnetic field associated with a quench that induction in the diaphram to contract. -

Correct Answers 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.

• decrease in room temperature
• increase in room temperature 1 / 3

• decrease in magnetic field strength
• increase in RF heating - Correct Answers a. decrease in room temperature
• decrease in magnetic field strength

A designated MR personnel should be present during a quench if the MRSO cannot be.

• True
• False - Correct Answers a. True

A conservative approach to breast-feeding after a mother receives gadolinium contrast is:

• to continue breast-feeding immediately after receiving an intravenous injection of gadolinium

contrast.

• to wait 12-24 hrs to breast feed after an intravenous injection of gadolinium contrast.
• to pump and dump breastmilk for 48 hrs after an intravenous injection of gadolinium.
• to mix formula with breastmilk for 24 hrs after an intravenous injection of gad. - Correct Answers
• to wait 12-24 hrs to breast feed after an intravenous injection of gadolinium contrast.

Gadolinium contrast media is excreted into breastmilk in an unstable non-water soluble form.

• true
• false - Correct Answers 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?

• >1%

b.<0.0004%

• 0.04%
• 20% - Correct Answers b.<0.0004%

Which of the following agents yields the best chance for transmetallation to occur?

• linear non-ionic
• linear ionic
• macrocyclic non-ionic
• macrocyclic ionic - Correct Answers a. linear non-ionic 2 / 3

Which of the following agents is the most stable?

• linear non-ionic
• linear ionic
• macrocyclic
• all are equally stable - Correct Answers c. macrocyclic

Which of the following was a sign to researchers that something was happening to renal compromised patients who received gad prior to uncovering the link of gadolinium contrast and NSF?

• Elevated levels of zinc in the urine
• nausea immediately after a bolus of gad
• confusion and chronic headaches in patients 1 month after injection.
• hyperintense areas in the brain were seen on T1 weighted images. - Correct Answers a. Elevated

levels of zinc in the urine What is the best way to prevent NSF?

• don't give gad to patients who are in renal failure.
• perform dialysis on the patient prior to the gad injection.
• hydrate patient prior to gad
• NSF can't be prevented - Correct Answers a. don't give gad to patients who are in renal failure.

Gad retention is identified because of what?

• zinc in a patient's urine
• increase signal on a T1 weighted image pre-contrast.
• plaques on a patient's skin
• death - Correct Answers b. increase signal on a T1 weighted image pre-contrast.

What type of gad contrast has shown to cause falsely low serum calcium lab values?

• linear non-ionic
• linear ionic
• macrocyclic
• / 3