MRSO-4 Exam with Complete Solutions Graded A+.docx

MRSO-4 Exam with Complete Solutions Graded A+.docx The quench vent in the MR room should be inspected by who? a. facility engineers b. manufacturer engineers c. MR tech d. MRMD - Answer-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 - Answer-a. facility engineers If a cryogen comes in contact with skin, what will happen? a. frostbite/necrosis b. nothing, in its gas form c. explode d. combust - Answer-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. - Answer-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 - Answer-a. decrease in room temperature c. decrease in magnetic field strength A designated MR personnel should be present during a quench if the MRSO cannot be. a. True b. False - Answer-a. True A conservative approach to breast-feeding after a mother receives gadolinium contrast is: continue breast-feeding immediately after receiving an intravenous injection of gadolinium contrast. 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. - Answer-b. 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. - Answer-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% - Answer-b.0.0004% Which of the following agents yields the best chance for transmetallation to occur? a. linear non-ionic r ionic cyclic non-ionic cyclic ionic - Answer-a. linear non-ionic Which of the following agents is the most stable? a. linear non-ionic b. linear ionic c. macrocyclic d. all are equally stable - Answer-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? a.Elevated levels of zinc in the urine a immediately after a bolus of gad sion and chronic headaches in patients 1 month after injection. intense areas in the brain were seen on T1 weighted images. - Answer-a. Elevated levels of zinc in the urine What is the best way to prevent NSF? 't give gad to patients who are in renal failure. rm dialysis on the patient prior to the gad injection. c. hydrate patient prior to gad d. NSF can't be prevented - Answer-a. don't give gad to patients who are in renal failure. Gad retention is identified because of what? a. zinc in a patient's urine b. increase signal on a T1 weighted image pre-contrast. c. plaques on a patient's skin d. death - Answer-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? a. linear non-ionic b. linear ionic c. macrocyclic d. there is no correlation - Answer-a. linear non-ionic Which of the following is true of gadolinium and breast-feeding mothers? select all that apply. inium is found in breast milk in a stable and chelated form. b.20% of the intravascular dose would be excreted into the breast milk within the first 24 hrs. able data suggests that breast-milk should be pumped and dumped for 24 hrs after injection. is thought that gad may alter the taste of breast milk. - Answer-a. gadolinium is found in breast milk in a stable and chelated form. d. it is thought that gad may alter the taste of breast milk. Gad has been found in the body in what form? select all that apply. a. water soluble b. non-water soluble - Answer-a. water soluble b. non-water soluble which of the following statements are true of gad? select all that apply. a. cases of NSF have been increasing over the last 5 yrs. b. gad retention has been linked to gad associated plaques. c. gad isn't linked to NSF d. it is hypothesized that gadolinium retention occurs due to it following pathways that other metals do, such as iron and calcium. - Answer-d. it is hypothesized that gadolinium retention occurs due to it following pathways that other metals do, such as iron and calcium. Which of the following is true of gad retention? select all that apply. a. it is a result of the sole processes of transmetallation. is seen in renal compromised patients. linear agent produces the same amount of retention in the brain. is seen in bone and brain tissue. - Answer-d. it is seen in bone and brain tissue. Which of the following increases the odds that a patient will develop NSF after an injection of gad? Select all that apply. tension nts over 60 yrs older c. thyroid disease d. renal disease - Answer-a. hypertension b. patients over 60 yrs older d. renal disease which of the following is true of gad associated plaques? Select all that apply. a. this is a common occurrence in MRI is the same thing as NSF occurs when gad is ingested is not related to renal compromised patients - Answer-d. it is not related to renal compromised patients Gadolinium retention is a long term issue that will retain gadolinium in the tissue for years. - Answer-a. true Pregnant patient's should never receive contrast. a. True b. False - Answer-b. False All linear agents have demonstrated the same amount of gad retention. a. True b. False - Answer-b. False Gadolinium can be ingested. a. True b. False - Answer-a. True