Exam (elaborations)
MRSO QUESTIONS AND ANSWERS
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MRSO QUESTIONS AND ANSWERS
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Name: Score:187 Multiple choice questions
Term 1 of 187
What is the maximum strength when a gradient coil is activated?
40 mT
5 mT
10 mT
90 mT
Term 2 of 187
Which of the following would most likely be unsafe when scanned?
Glaucoma drainage implant.
Scleral buckle
Clear contact lens.
None of the choices are most likely unsafe.
Term 3 of 187
The amount of energy used to move hydrogen 180 degrees. This is used in a spin echo
sequence to regain phase coherency.
45 Degree Rf
180 Degree RF
175 Degree Rf
90 Degree Rf
,Term 4 of 187
The greatest chance of a burn to a patient comes from which of the following?
Static magnetic field.
Time-varying gradient magnetic field.
Time-varying radiofrequency field.
Term 5 of 187
Which of the following implants would produce the most heating when exposed to the
maximum RF in normal mode and scanned in a 1.5T unit?
3mm BB
2 cm illiac stent
12cm linear cardiac leads
25cm neurostimulator lead
Term 6 of 187
It is not safe for a patient to cross over the 5 gauss line. How many millitesla is this?
0.5mT
5mT
50mT
0.005mT
Term 7 of 187
We would find a patient changing into a gown in what zone?
Zone I
Zone II
Zone III
Zone IV
,Term 8 of 187
A force which aligns objects affected by the static magnetic field to its flux lines.
Rational Speed
Lenz's Force
Cord Concussion
Rotational Force
Term 9 of 187
The patient gets nausea immediately after injection and it passes after 30 seconds. This is an
example of what?
Non-allergic reaction
Allergic reaction
Anaphylaxis
Moderate reaction
Term 10 of 187
What is the purpose of the time-varying gradient magnetic field?
To produce resonance in our hydrogen nuclei
To change the precessional speeds of hydrogen
To produce net magnetism
To form an image.
Term 11 of 187
The area in the gantry which is closest to the RF transmitter.
Near Field
Electromagnetic Spectrum
E-fields
Maximum Gradient Field
, Term 12 of 187
A magnetic field unit of measurement.
Vector
Precession
Tesla
Gauss
Term 13 of 187
NEMA will perform testing on materials
True
False
Term 14 of 187
Which of the following can be used to reduce artifacts in the image?
Decrease receiver bandwidth.
Use a GRASS pulse sequence.
Decreasing the image matrix.
Running a PD sequence rather than a T2.
Term 15 of 187
Which of the following would not be safe to scan a patient when looking at it from the static
magnetic field?
Bullet in the femur.
A piece of shrapnel in the mediastinum.
A BB in a patients sinus.
A small piece of metal in their abdominal rectus muscle.
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