DETAILED ANSWERS
Which of the following situations would promote the highest risk of an object reacting to the
static magnetic field?
1. A 5 foot seven inpatient for brain MRI with a lumbar fusion.
2. All of the choices are a risk.
3. A 5 foot seven impatient for lumbar spine with an unknown G.I. clip.
4. A 5 foot nine inpatient for a cervical spine MRI with an unknown cardiac stent. - (Correct
Answer)-3.
Arrythmogenesis potential can be produced at which of the following
1. Scanning a cardiac MRI with a heart valve.
2. Scanning in the abdomen with a cardiac stent
3. Scanning a brain with retain cardiac leads.
4. Scanning a foot with a transmit receive coil. - (Correct Answer)-Scanning a brain with a
retained cardiac leads
An object that is electrically conductive, but not Ferris is moving through the magnetic spatial
gradient. Opposing magnetic forces are produced in that object. This can be explained by what -
(Correct Answer)-Lenz force
Which of the following slew rates will describe a faster changing time varying gradient?
1. 100 T/m/s
2.125
3.150
4.200 - (Correct Answer)-200
Heating in our patient is dependent on which of the following? Select all that apply.
1. Management of heating to expose tissue.
2. Tissue conductivity.
, 2
3. Tissue permittivity.
4. Slice thickness. - (Correct Answer)-1,2,3
Which of the following can be used as a heat sink?
1. A piece of 100% cloth.
2. A piece of aluminum foil.
3. A 1 cm pad.
4. An ice pack. - (Correct Answer)-Ice pack
An obese patient has tissue pressed against the side of the bore. What burn is the patient at risk
of? - (Correct Answer)-Proximity burn
You have reached your limit and cannot continue scanning what can be done to reduce your SAR
1. Add more slices.
2. Decrease receiving bandwidth.
3. Increase flip angle.
4. Decrease TE. - (Correct Answer)-Decrease receiving bandwidth
A patient has a hip replacement and is undergoing an MRI exam of the hip. What could happen -
(Correct Answer)-Production of hotspots around the implant
____ describes gadolinium getting into the water supply - (Correct Answer)-Anthropogenic
Is known that there is flammable risk associated with a quench that released cryogen into the
room. This occurs because helium is flammable true or false. - (Correct Answer)-False
Which of the following is the best solution at reducing hearing damage the patients during
acquisition
, 3
1. Make sure earplugs are placed properly.
2. Using both earplugs and a headset.
3. Properly placing earplugs in patient's ears and putting additional pad around their head.
4. All of the choices. - (Correct Answer)-All of the choices
Who is responsible for maintaining the quench vent outside the site - (Correct Answer)-Site
engineer
What is used to reduce the fringe field? - (Correct Answer)-shielding
Induce current in a patient can be described by what? - (Correct Answer)-Faraday's law of
induction
Which of the following would be considered an allergic reaction to gadolinium contrast?
1. All of choices
2. Swelling
3. Hives
4. Sneezing - (Correct Answer)-All
A patient is only given a headset to reduce the noise in MRI. This is sufficient to protect from
any hearing damage true or false. - (Correct Answer)-False
If helium gas is released into the scan room, air can be displaced this can cause what - (Correct
Answer)-Asphyxiation
What produces noise you hear during an MRI? - (Correct Answer)-Time-varying gradient field