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MRSO PRACTICE EXAM
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MRSO PRACTICE EXAM 2024-2025Physical impacts of STATIC FIELDS - Translation, Rotation, and Lens
Physical impacts of TIME-VARYING FIELDS - ANSWER MOTION
noise
induced currents (on the item or in person)
Lenz
translation
rotation
Everything that is not MR SAFE should be left behind... - ANSWER 5 Gauss line
Earth's magnetic field - ANSWER 0.5 gauss
1.5T = ___ Gauss - ANSWER 15,000
3 T = ___ gauss - 30,000.
MR device can be seen as a non-significant danger. IF: (list) - ANSWER static
magnetic field
SAR
dB/dt
Sound Pressure Level
, ^ are below a specific threshold.
dB/dt - gradient field rate of change
Can cause significant discomfort and nerve stimulation.
Limits for # Tesla adults can take - ANSWER: 8T
Limits for a Tesla that is more than one month old - ANSWER 4T
Maximum unprotected sound level: 140 decibels.
The maximum protected sound level is 99 decibels.
Biological effects of high magnetic fields: ANSWER vertigo
dizziness
nausea
Magnetohydrodynamic effects.
Induced electric currents... (for time variable...)
magnetophosphenes
Nerve stimulation or tingling
Hair static (electric charges on the skin)
Are there any known prenatal consequences from intense magnetic fields? -
ANSWER Nope
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