Exam (elaborations)
Armrit part 3 Questions and Answers
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Exam of 3 pages for the course ARMRIT at ARMRIT (Armrit part 3)
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Armrit part 3The factor which determines the calculated SAR averages is : - answerthe patient's
weight in kilograms
The force that can cause a ferromagnetic object such as an oxygen tank to become a
projectile in the fringe field is : - answerTranslational attraction
A ferromagnetic object in the shape of a sphere will not experience : - answerTorque
Acoustic noise is experienced during an MRI study and is caused by : - answerGMF
An explosive boiling off of liquid helium and / or liquid nitrogen and a sudden loss of
superconductivity is known as a : - answerQuench
Once a patient has been screened , positioned , and the MRI study is under way , the
MRI Technologist should - answerMonitor the patient throughout the MRI study visually
and by using the patient intercom .
The maximum exposure to the extremities from the main magnetic field ( Bo ) is : -
answer5T
Side effects associated with gradient magnetic fields are : - answerbones healing
faster , cardiac fibrillation , magnetophosphenes
SAR is the rate that electromagnetic energy is introduced to body tissue , measured in -
answerw / kg
Exposure to gradient magnetic fields are based on the premise that the fields should be
too weak to cause neuromuscular stimulation by at least a factor of : - answer3
Currently , there is no evidence of a threat to fetal development from exposure to : -
answerMagnetic Resonance
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 - answertorque
The maximum exposure to the head and trunk from the main magnetic field ( Bo ) is : -
answer5T
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