Exam (elaborations)
MRSO EXAM GUIDE QUESTIONS WITH ACCURATE ANSWERS
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Exam of 6 pages for the course MRSO at MRSO (MRSO EXAM GUIDE)
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MRSO EXAM GUIDEA 180 degree RF pulse contains how much more energy than a 90 degree RF pulse? -
answer4X
According to the ACR manual on MRI Safety 2020, an aneurysm placed in 2019 at a
reputable facility using MR tested clips would hold what level of risk to our patient? -
answer LOW
TRUE/FALSE? According to the ACR Manual on MRI Safety 2020, it is recommended
to stop and perform a final check to makes sure that you are scanning the correct
patient and have a screening sheet which had been reviewed. - answer TRUE
According to the ACR manual on MRI Safety 2020, what is the half wavelength at 7T
which place a patient at risk of resonant burns? - answer5-7 CM
TRUE/FALSE? According to the IEC 60601-2- 33 document, it is fine to scan a
pregnant woman in the first trimester. - answer FALSE
According to the Veterans Health Administration directive on MRI 2013, it is
recommended that how many technologists be working within zone 2? - answerTWO
A/m defines what? - answerMAGNETIC FIELD STRENGTH
As we increase body size, SAR will increase by how much? - answerSQUARED
As we increase field strength, SAR will increase by how much? - answerSQUARED
B0 defines what? - answerMAGNETIC FLUX DENSITY
B1+rms is measured in what? - answerW/kg; J/kg; Microtelsa(mT)
Can a patient be scanned at 3T if the MR conditions state that n implanted device can
be scanned at 128MHz? - answerYES
A condition states that an implanted device can be scanned at 63MHz, this means
what? - answerIt can be scanned at 1.5T
Copper has a weekly repulsive force in the presence of a magnetic source. It is
considered what? - answerDiamagnetic
The created chance for induced current in our patient would be found where? -
answerPeripherial to isocenter
, Delivering more RF pulses to our patient will do what? - answerIncrease heating
FPO:B will do what? - answerIt will limit B1+rms and slew rate
Gadolinium contrast will do what to T1 and T2 relaxation? - answerIt will shorten it
Tightly packed lines of magnetic flux are described as? - answerMagnetic flux density
An implant condition states that an implant can only be scanned in normal mode whole
body. What does this mean? - answerWe are limited to 4 W/kg. We can scan up to 3T.
We are liming to 2 W/kg.
In a gradient profile, which of the following describe a period of time where the gradients
are not changing? - answerDuty cycle
In a gradient profile, which of the following describe the strength a gradient will be
activated in mT/m? - answerMaximum gradient
Increasing repetition time will do what to induced currents in our patient? -
answerDecrease
Iron has a very strong attractive force in the presence of a magnetic source. This is
considered? - answerFerromagnetic
TRUE/FALSE? It is acceptable to use an MRI screening sheet which was completed
three days prior to a patient receiving an MRI exam. - answerFALSE
Magnetic flux travel from the _____ pole to the _____ pole of a magnetic source. -
answerNorth ; South
Magneto phosphenes and confusion can occur after a quench and are caused by what?
- answerDeteriorating magnetic field
Normal mode limits the operation of the gradient coils to _____ its maximum. -
answer80%
An object is strongly attracted to a magnetic source. We can say that an object that
behaves this way has a _____ susceptibility. - answerHigh
TRUE/FALSE? Patients should remove their street clothes and any jewelry prior to
having an MRI to reduce the risk of injury. - answerTRUE
The purpose of and MRI screening sheet is to do what? - answerEvaluate for any risks
to a patient
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