As technologists, we can easily identify that the phase direction is from
A)
sagittal; axial B)
axial; coronal C)
left; right D)
superior; inferior Ans- C) left; right
Which artifact should be identified above?
A)
Phase Wrap artifact B)
Matrix seizure artifact C)
Magic angle artifac...
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MRI quiz 5 week 6, MRI quiz 4 week 5,
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MRI Quiz 1 week 2;(Combined Quizzes
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As technologists, we can easily identify that the phase direction is from to
.
A)
sagittal;
axial B)
axial;
coronal C)
left; right
D)
superior; inferior Ans-
C) left; right
Which artifact should be identified above?
A)
Phase Wrap artifact
B)
Matrix seizure artifact
C)
Magic angle artifact
D)
No artifact is present. Ans-
A) Phase Wrap artifact
The addition of an is the difference between 2D and 3D
imaging.
A)
extra frequency
direction B)
extra phase
direction C)
extra phase and frequency direction
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D)
additional NEX Ans- B)
extra phase direction
To perform a proper Axial T2-weighted image of the Brain, you would utilize a
TR and a TE.
A)
Long, Long
B)
Long, Short
C)
Short, Long
D)
Short, Short Ans- A)
Long, Long
Increasing your slice thickness from 3mm to 5mm will SNR because
.
A)
decrease; it allows more spatial
resolution. B)
increase; increasing thickness allows less area of the body to be
sampled. C)
increase; it allows the sampling of more protons per
slice. D)
remain the same; it has no effect on SNR. Ans- C)
increase; it allows the sampling of more protons per
slice.
Increasing your matrix on a MRI Knee from 320x288 to 512x384 will
spatial resolution while SNR.
A)
increase;
increase B)
increases;
decrease C)
decrease; decrease
D)
decrease; increase Ans- B)
increases; decrease
In comparison, an MR image of 288x160 would be called a matrix,
while an MR image of 512x416 would be a matrix.
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A)
fine; coarse
B)
not correct
options C)
coarse; fine
D)
higher resolution; low resolution Ans- C)
coarse; fine
Which of the following are TRUE regarding Number of Excitations?
A)
Increases
matrix B)
Increases scan
time C)
Decreases SNR
D)
Increases SNR Ans- B)
Increases scan time
D)
Increases SNR
Ideally used for mass and contrast imaging, T1-weighted images uses a TR range of
- ms and a TE range of - ms.
A)
400-700; 10-14
B)
2000-6800; 10-14
C)
4000-6800; 10-14
D)
400-700; 105-115 Ans- A)
400-700; 10-14
An in FOV will SNR.
A)
decrease decrease
B)
increase;
increase C)
decrease, increase
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D)
increase; decrease Ans- B)
increase; increase
As you increase Echo Train Length, you SNR because
.
A)
have no effect on; the echo's need to be sampled no matter
what. B)
slightly effect; signals vary amount refocusing
pulses C)
decrease; echo's are being sampled further from the initial 90 RF
pulse D)
increase; echo's are being sampled further from the initial 90 RF pulse Ans- C)
decrease; echo's are being sampled further from the initial 90 RF pulse
Dr. Screwball comes to the MRI department and states he wants you to perform
an exam to r/o myositis. He states, "we do not need perfect imaging, just to cover
a larger area from the hips to the knees." What would be the imaging parameter
adjustment to cover this large area?
A)
Decrease NEX
B)
Increase FOV
C)
Increase Gap or Spacing between each
slice D)
Decrease TR Ans- C)
Increase Gap or Spacing between each slice
Motion is ALWAYS found in the direction.
A)
matri
x B)
frequenc
y C)
axia
l D)
phase Ans- D)
phase
Scenario: You are working in a inpatient facility and notice a MRI Brain script
coming from the printer. You see on the script the patient has history of
Parkinson's disease.
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