MRSO Questions & 100% Correct Answers

Active Shielding ~~> The use of a coil of wire, with an electrical current running through it, to produce an electromagnetic field opposing the static magnetic field, to reduce the fringe field. Bsub0 ~~> The unit used to describe the static magnetic field. Deflection ~~> The am...

Static field metrics ~~> 1T = 10,000G (0.5mT = 5G) Who published guidelines titled "Criteria for Significant Risk" that specifies what qualifies as significant risk of exposure to magnetic field associated with MRI. ~~> FDA FDA guidelines state EXPOSURE to a static field that does n...

Allergic Reaction ~~> A reaction to a contrast media involving the body producing histamines, leading to serious adverse effects on the patient. Anaphylactic Reaction ~~> A severe reaction to contrast media. Anthropogenic ~~> The entry of gadolinium contrast into the drinking wate...

MR Safety Officer responsibilities ~~> The role of MRSO is often carried out by the senior Radiographer (in the USA this will generally be an MR technologist), but other suitably trained individuals could also fill this role. Multiple MRSOs could be appointed, provided only one is in charg...

What pulse sequence will produce the most patient heating? A. Inverse recovery sequence B. Single shot fast spin echo C. Conventional spin echo D. Gradient Echo ~~> B. Single shot fast spin echo During acquisition, it is noticed that the T wave of the cardiac cycle is elevated. What is t...

Zero Boil-Off ~~> System that reduces/eliminates the need to recharge Helium in a magnet. Quench ~~> Quickly eliminating the magnetic field. Not immediate, takes 3 to 5 minutes to completely eliminate magnetic field. Loud Noise as Helium rushes out of Quench Vent. Can cause crack in ...

How do magnetic flux lines travel? A. North to South B. South to North C. East to West D. West to East ~~> A North to South Which of the following can be potential safety concerns to a patient in the static magnetic field? A. Electrically conductive materials B. Ferrous objects C. Mag...

In which ways an a patient self regulate their temperature when they overheat? ~~> Evaporation, Radiation Which of the following statements are true when discussing MR safety Larger patients will heat up most Smaller patients heat up most Larger patients are ferromagnetic Induction only...

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 ~~> b. Lenz's force What is the FDA SAR limit for the whole body in first level controlled operating mode? a. 8 ...

Peripheral nerve stimulation can be described by which of the following? a. Faraday's law of induction b. Ohm's law c. Lenz's law d. Planks Law ~~> b. Faraday's law of induction (describes the induction of electrical current in the presence of a changing magnetic field). Lenz's forc...

All MR medical directors must report incidents to which of the following? a. FDA Medwatch Program b. ACR MR safety board c. None of the choices d. All of the choices ~~> a. FDA Medwatch Program Which of the following is not true? a. Screening process for non-MR personnel and MR personnel ...

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 ~~...

What is the name of the gradient coil used to produce sagittal and coronal images? a. Transverse coil b. Golay coil c. Maxwell coil d. Receiver coil ~~> b. Golay coil ("saddle coil") Which of the following is able to handle the most RF heating? a. elderly b. adult c. obese adult d....

The control room is found where? a. Zone I b. Zone II c. Zone III d. Zone IV ~~> C. Zone III 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 ~~> b. Lenz's...