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MRI ARMRIT 2024 Practice Test #3 Questions and Answers 100% Solved
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MRI ARMRIT 2024 Practice Test #3
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MRI ARMRIT 2024 Practice Test #3Hazard associated with large ferromagnetic objects, such as oxygen tanks is
contradicted in MR magnets with a field strength of:
A) Partial strength
B) Any Strength
C) Slow moving
D) Fast moving - answerB) Any strength
Maximum exposure to RF in one gram of tissue is:
A) No more than 0.4 w/kg
B) No more than 3.2 w/kg
C) No more than 8 w/kg
D) A maximum spatial peak of 8 w/kg - answerB) No more than 3.2 w/kg
Side effects associated with gradient magnetic fields are :
A) Tissue heating and cataract formation
B) infertility
C) Bones healing faster , cardiac fibrillation, magneto-phosphenes
D) Deceleration - answerC) Bones healing faster , cardiac fibrillation, magneto-
phosphenes
Passed through a strong magnetic field, some implanted and ferromagnetic devices
such as neuro-aneurysm clips, suture material, and surgical clips may experience the
force of:
A) Inertia
B) Torque
C) Acceleration
D) Deceleration - answerB) Torque
Maximum exposure to RF averaged over the head is:
A) No more than 0.4 w/kg
B) No more than 3.2 w/kg
, C) No more than 8 w/kg
D) A maximum spatial peak of 8 w/kg - answerB) No more than 3.2 w/kg
Conductive material in the MRI environment can be affected by electrical currents from:
A) Bo
B) GMF
C) RF only
D) GMF and or/ RF - answerD) GMF and or/ RF
Currently, there is no evidence of a thereat to a fetal development from exposure to:
A) Computer Axial Tomography
B) X- Ray
C) Magnetic Resonance
D) Nuclear Medicine - answerC) Magnetic Resonance
An explosive boiling off of liquid helium and/or liquid nitrogen and a sudden loss of
superconductivity is known as a:
A) Ramp down
B) Quench
C) Ramp up
D) Service - answerB) Quench
At rest, the approximately basal metabolic rate for humans is:
A) 15 w/kg
B) 1 w/kg
C) 3.5 w/kg
D) 8 w/kg - answerB) 1 w/kg
The MRI environment, especially the MRI scan room, is ultimately the responsibility of
the:
A) Physician reading the MRI films
B) MRI Technologist on duty
C) MRI office manager
D) MRI receptionist - answerB) MRI Technologist on duty
The factor which determines the calculated SAR averages is:
A) Heat dissipated over time
B) The patient's weight in kilograms
C) An average calculation of heat per milliseconds
D) Field strength - answerB) The patient's weight in kilograms
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