When performing an MR pelvis, which of the following would cause the most artifact in
our exam?
a. Titanium hip replacement
b. Ureter stent
c. Dacron iliac graft
d. IUD - Answer a. Titanium hip replacemen
MRSO: Exam 3 Questions & Correct Revised
Verified Answers
When performing an MR pelvis, which of the following would cause the most artifact in
our exam?
a. Titanium hip replacement
b. Ureter stent
c. Dacron iliac graft
d. IUD - Answer a. Titanium hip replacement
Which of the following stainless steels are non-ferrous?
a. Martenistic
b. Austenitic
c. Ferritic
d. Duplex - Answer b. Austenitic
Which of the following will create localized patient heating?
a. None of the choices
b. Body RF coil
c. Receive only coil
d. Transmit-receive coil - Answer d. Transmit-receive coil
Eddy currents are produced from which of the following?
a. Moving MR table
,b. Gradient magnetic field
c. All of the choices
d. Static magnetic field - Answer b. Gradient magnetic field
As gradient coils are activated and deactivated, currents can be produced in conductive
materials in our MR unit. These are eddy currents and cause artifact in our images.
Which of the following is true if we increase the image matrix from 256 x 256 to 512 x
512?
a. We use a weak time-varying gradient magnetic field
b. We reduce patient heating
c. We reduce peripheral nerve stimulation
d. We use a stronger time-varying gradient magnetic field - Answer d. We use a stronger
time-varying gradient magnetic field
Larger image matrix will produce higher resolution exams. The size of the image matrix
is dependent on the phase encoding gradient coil. When we increase the image matrix,
we increase the amplitude of our gradient coil.
The slew rate influences which of the following?
a. Both the minimal TE and image matrix size
b. The size of the image matrix
c. The minimal matrix size
d. Shorter echo spacing - Answer d. Shorter echo spacing
The speed of the gradient coils activating and deactivating will affect the speed of our
scanner. Faster slew rates will decrease the minimal TE & TR. The faster our gradient
, coils can turn on & off means that the rise time is faster. This will allow our echo spacing
to shorten and therefore promote faster imaging.
What zone is the quench pipe located where it vents outside?
a. Zone II
b. Zone III
c. Zone IV
d. Zone I - Answer c. Zone III
A MR tech is distracted by another patient and brings a non-MR compatible O2 tank in
the room which severely injures a patient. This is an example of what?
a. Malpractice
b. Negligence
c. Infraction
d. Tort - Answer a. Malpractice
When performing an abdominal MRI, which of the following would be the biggest
artifact issue in the area we are scanning?
a. Femur rodding with titanium
b. Aortic aneurysm repair with stainless steel mesh
c. Sternal wires with stainless steel
d. Lumbar 4-5 fusion with stainless steel - Answer b. Aortic aneurysm repair with
stainless steel mesh
A patient is warming up during their exam. What can be done to reduce the heating?
Select all that apply.
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