Magnetophosphenes - Study guides, Class notes & Summaries

1. 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: Correct answer B. Single shot fast spin echo 2. During acquisition, it is noticed that the T wave of the cardiac cycle is elevated. What is this artifact called? A. Magnetohydrodynamic Effect B. Excitation C. Teratogenesis D. Magnetophosphenes: Correct answer A. Magnetohyrdodynamic Effect 3. When can heating occur in a wire?...

Static magnetic field Biological forces of Bo - correct answer Magnetophosphenes Magneto hydrodynamic effect Flow potentials/EKG perturbations -Vertigo/dizziness/nystagmus/ nausea with motion in the bo : field strength related/ especially in 7T Pregnancy related issues: spontaneous abortion, premature delivery, gender of offspring, low birth weight, infertility Mechanical forces - correct answer Translational forces (missile effect) 1. Magnetic spacial gradient exposure c field expos...

MRSO: Exam mark (Answered 100% Correctly) MRSO: Exam mark (Answered 100% Correctly) 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 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 b. 4 W/kg for 15 mins Gadolinium...

MAGNETIC RESONANCE SAFETY OFFICER (MRSO) MOCK TEST 1 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: Correct answer B. Single shot fast spin echo 2. During acquisition, it is noticed that the T wave of the cardiac cycle is elevated. What is this artifact called? A. Magnetohydrodynamic Effect B. Excitation C. Teratogenesis D. Magnetophosphenes: Correct answer A. Magnetohyrdod...

MRSO FINAL EXAM QUESTIONS AND ANSWERS LATEST 2024 (GRADED A+) 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. Magnetic objects D. All of the choices. - Answer D. All of the choices An object that retains its magnetic field when exiting the static magnetic field is call what? A. Paramagnetic B. Diamagnetic C. Ferromagnetic D. Superparamagnetic - Answer C. Ferromagnetic What di...

MRSO EXAM 1| Questions and Answers, 100% Correct| Updated 2024 The control room is found where? a. Zone I b. Zone II c. Zone III d. Zone IV - answerC. 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 - answerb. 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 d...

MRSO Final Exam |Question and Answers| 2024 MR Safety Officer responsibilities *Ans* 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 charge at a given time. His/her responsibilities include the following: To be readily accessible and available (eg, to the operators of the MR system) at all...

MRSO Exam Prep 144 Questions with Correct Answers 100% Verified 2024/2025 MR Safety Officer responsibilities - Correct Answers 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 charge at a given time. His/her responsibilities include the following: To be readily accessible and available (eg, to th...

MRSO Practice Exam |Question and Answers| VERIFIED!! || IEC DB/DBA limits for MRI *Ans* 140 DB 99 DBA parameters to reduce noise in MRI *Ans* -thicker slices -larger FOV -smaller matrix -parallel imaging -reducing bandwidth (increasing TE) -active noise reduction -Low SAR RF mode (increase in echo spacing)-thicker slices MRI sequence that produces the most and least noise in MRI *Ans* Most noise EPI/DWI least noise spin echo sequence an increase in slew rate and gradient amplitud...

MRSOFaraday's Law of Induction - correct answer Describes currents produced by changing magnetic fields E=dt/dΦ Faraday's First Law - correct answer A change in magnetic field while in the presence of a coil of wire will produce a voltage Faraday's Second law - correct answer The amount of induction is equal to the rate of changing flux and the number of wire coils When we ___________________ the number of coils in an electrically conductive object, we decrease the amount of voltag...