MRSO: Exam 1 question with complete solutions graded A+ passed

MRSO: Exam 1 question with complete solutions graded A+ passedThe control room is found where? a. Zone I b. Zone II c. Zone III d. Zone IV - correct answer 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 - correct 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 - correct 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 - correct answer b. 4 W/kg for 15 mins Gadolinium contains what kind of magnetism? a. Diamagnetic b. Paramagnetic c. Ferromagnetic d. Super paramagnetic - correct 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 - correct 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 - correct 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 - correct answer c. Magnetophosphenes What is the name for the direction of the vector of the static magnetic field? a. Inverse field b. Equilibrium c. B0 d. B1 - correct answer c. B0 An object that produces a weakly repulsive force in the presence of a strong magnetic field is called what? a. Superparamagnetic b. Ferromagnetic c. Diamagnetic d. Paramagnetic - correct answer c. Diamagnetic What are the risks associated with translational force? a. Missile effect b. Proximity heating c. Antenna effect d. Peripheral nerve stimulation - correct answer a. Missile effect Which of the following are recommended by the ACR guidance document in MR safety 2013 in proper scanning of a patient? a. Patient gown b. Written screening sheet c. Metal detector d. Ferromagnetic detection system - correct answer