MRI 200 EXAM Week 13 with 100% correct answers 2024/2025
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Course
MRI 200 EM 3
Institution
MRI 200 EM 3
Motion/Flow correct answersSwapping Phase and Frequency directions can be done by the technologist to minimize _____ artifact
Select one:
a. Wrap around
b. Fold-over
c. Motion/Flow
d. None of these
Left-Right correct answersTo minimize motion artifact due to eyes' motion in an axial brain i...
Motion/Flow correct answersSwapping Phase and Frequency directions can be done by the technologist
to minimize _____ artifact
Select one:
a. Wrap around
b. Fold-over
c. Motion/Flow
d. None of these
Left-Right correct answersTo minimize motion artifact due to eyes' motion in an axial brain image, the
phase direction should be set ________
Select one:
a. anterior-posterior
b. left-right
c. superior-inferior
True correct answersTo minimize motion artifact due to abdominal fat motion (diaphragmatic
respiration) in an axial image of the abdomen, the phase direction should be set as left-to-right
Select one:
True
False
Shortest correct answersNormally, in order to minimize scan time, the phase direction should be set
along the direction of the _______ dimension of the anatomy being imaged (e.g. for the head, the
anterior-posterior dimension is longer than the side to side dimension)
Select one:
a. shortest
b. longest
,True correct answersArterial blood pulsation and CSF pulsation can cause motion artifact
Select one:
True
False
True correct answersMotion due to breathing/respiration can be minimized through breath hold (the
patient is asked to hold the breath for several seconds)
Select one:
True
False
False correct answersWrap-around is NOT a form of aliasing artifact
Select one:
True
False
True correct answersWrap-around artifact is also called Fold-over artifact
Select one:
True
False
False correct answersWrap-around artifact happens when the FOV is bigger than the anatomy imaged
Select one:
True
False
False correct answersWrap-around mainly happens in the fequency direction
Select one:
, True
False
All of these correct answersThe "no-phase-wrap" technique works by ______
Select one:
a. Increasing the FOV in the phase direction
b. Proportionally increasing the number of phase steps Ny (aka Np)
c. Reducing the NEX or adopt "partial Fourier" (to avoid increasing scan time)
d. Reconstructing and displaying only the middle/central part of the FOV
e. All of these
True correct answersWith the no-phase-wrap technique, if NEX is not reduced to compensate for the
increase in Ny steps, the scan time will increase (compared to not using this technique)
Select one:
True
False
T2 correct answersWith SSFSE, we can only get _____ weighted image contrast
Select one:
a. T2
b. T1
c. PD
d. T2*
Phase Z correct answersTo image a 3D volume of anatomy, a few additional _____ steps must be used in
the ____ direction
Select one:
a. phase Z
b. phase Y
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