4369280
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Quiz von Thea Ampofo, aktualisiert more than 1 year ago
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Frage 1
Frage
The type of pulse sequence that uses only 90 degree RF pulses is known
as (**answer pending correction)
Antworten
-
Partial saturation pulse sequence
-
Gradient echo pulse sequence
-
Saturation recovery pulse sequence
-
Partial saturation pulse sequence & Gradient echo pulse sequence
Frage 2
Frage
A spin echo pulse sequence is characterized by which of the following
Antworten
-
A 180 degree excitation pulse followed by a 90 degree rephasing pulse
-
A 90 degree excitation pulse followed by a 180 degree rephasing pulse
-
A 90 degree excitation pulse followed by a 90 degree rephasing pulse
-
None of the above
Frage 3
Frage
Which of the following is the pulse sequence that is used most commonly?
Antworten
-
Inversion recovery
-
Gradient echo
-
Spin echo
-
Echo planar
Frage 4
Frage
Which of the following is an advantage of using a spin echo pulse sequence
Antworten
-
High signal to noise ratio
-
Decreased resolution
-
Long scan times
-
None of the above
Frage 5
Frage
In conventional spin echo pulse sequences, how many phase encoding steps
are achieved per TR
Antworten
-
1
-
128
-
192
-
256
Frage 6
Frage
In conventional spin echo pulse sequences, how many lines of K space are
filled per TR
Antworten
-
1
-
2
-
4
-
6
Frage 7
Frage
The spin echo pulse sequence that performs more than one phase encoding
step per TR is known as
Antworten
-
Conventional spin echo
-
Fast spin echo
-
RARE
-
Fast spin echo & RARE
Frage 8
Frage
The pulse sequence that performs a series of 180 degree rephasing pulses and
echos is known as
Antworten
-
Echo planar
-
Inversion recovery
-
Fast spin echo
-
Conventional spin echo
Frage 9
Frage
The series of 180 degree rephasing pulses in a fast spin echo pulse sequence
is known as
Antworten
-
Echo train
-
Inversion train
-
Echo plane
-
None of the above
Frage 10
Frage
The number of 180 degree rephasing pulses performed in a fast spin echo
pulse sequence is known as its
Antworten
-
Turbo factor
-
Inversion factor
-
Echo train length
-
Turbo factor & Echo train length
Frage 11
Frage
In a RARE pulse sequence, the multiple number of echo times that
create image weighting are averaged together to produce what is known
as the
Antworten
-
Effective TR
-
Effective TI
-
Effective TE
-
None of the above
Frage 12
Frage
Which of the following is an advantage of a fast spin echo pulse sequence
Antworten
-
Reduced scan times
-
Improved quality
-
Increased T2 weighting
-
All of the above
Frage 13
Frage
Which of the following is a disadvantage of fast spin echo pulse sequences
Antworten
-
Increased effects of flow motion
-
Bright fat on T2 weighted images
-
Increased resolution
-
Increased effects of flow motion & Bright fat on T2 weighted images
Frage 14
Frage
The type of spin echo pulse sequence that begins with a 180 degree inversion
RF pulse and is followed by a 90 degree excitation pulse is known as
Antworten
-
Echo planar
-
Gradient echo
-
Inversion recovery
-
Gradient reversal
Frage 15
Frage
During an inversion recovery pulse sequence, the time between the 180
degree inversion pulse and the 90 degree excitation pulse is known as
Antworten
-
Echo time
-
Repetition time
-
Inversion time
-
Reversion time
Frage 16
Frage
The inversion recovery pulse sequence that is used to suppress fat in a Tl
weighted linage is known as
Antworten
-
FLAIR
-
STIR
-
SSFP
-
FLASH
Frage 17
Frage
The inversion recovery pulse sequence that is used to suppress CSF in proton
density and T2 weighted linages is known as
Antworten
-
FLAIR
-
STIR
-
SSFP
-
FISP
Frage 18
Frage
The type of pulse sequence that uses a gradient instead of a 180 degree RF
pulse to rephase dephasing nuclei is known as
Antworten
-
Spin echo
-
Inversion recovery
-
Fast spin echo
-
Gradient echo
Frage 19
Frage
In a gradient echo pulse sequence, which gradient is used to dephase and
rephase nuclei
Antworten
-
Slice select gradient
-
Phase encoding gradient
-
Frequency encoding gradient
-
None of the above
Frage 20
Frage
In a gradient echo pulse sequence, which parameter directly affects linage
weighting?
Antworten
-
NEX
-
Field of view
-
Flip angle
-
Matrix
Frage 21
Frage
The condition that occurs in a gradient echo pulse sequence when the TR is
shorter than the T1 and T2 relaxation times of tissue is known as
Antworten
-
Chemical shift
-
Steady state
-
Frequency shift
-
Phase shift
Frage 22
Frage
In a gradient echo pulse sequence, transverse magnetization that is leftover
from a previous excitation pulse is known as
Antworten
-
Residual transverse magnetization
-
Magnetization transfer
-
Chemical misregistration
-
None of the above
Frage 23
Frage
Gradient echo pulse sequences that preserve left over transverse
magnetization are said to be
Antworten
-
Incoherent
-
Coherent
-
Consistent
-
Inconsistent
Frage 24
Frage
Gradient echo pulse sequences that eliminate leftover transverse
magnetization are said to be
Antworten
-
Incoherent
-
Coherent
-
Consistent
-
Inconsistent
Frage 25
Frage
In a gradient echo pulse sequence, the process of reversing the slope of the
phase encoding gradient after readout to preserve residual transverse
magnetization is known as
Antworten
-
Warping
-
Spoiling
-
Rewinding
-
None of the above
Frage 26
Frage
In a gradient echo pulse sequence, the process of eliminating residual
transverse magnetization is known as
Antworten
-
Warping
-
Spoiling
-
Rewinding
-
None of the above
Frage 27
Frage
Which of the following is a method of eliminating residual transverse
magnetization
Antworten
-
Digital RF spoiling
-
Gradient rewinding
-
Gradient spoiling
-
Digital RF spoiling & Gradient spoiling
Frage 28
Frage
In a gradient echo pulse sequence, the use of an RF pulse to eliminate
residual transverse magnetization is known as
Antworten
-
Digital RF spoiling
-
Frequency spoiling
-
Gradient spoiling
-
None of the above
Frage 29
Frage
In a gradient echo pulse sequence, the use of a gradient to eliminate residual
transverse magnetization is known as
Antworten
-
Digital RF spoiling
-
Frequency spoiling
-
Gradient spoiling
-
None of the above
Frage 30
Frage
Gradient echo pulse sequences that have incoherent residual transverse
magnetization are primarily used to create what type of image weighting
Antworten
-
Tl weighting
-
T2 weighting
-
Proton density weighting
-
Tl weighting & Proton density weighting
Frage 31
Frage
Gradient echo pulse sequences that have coherent residual transverse
magnetization produce what type of image weighting
Antworten
-
T1 weighting
-
T2* weighting
-
Proton density weighting
-
T1 weighting & Proton density weighting
Frage 32
Frage
Which of the following is an advantage of gradient echo pulse sequences
Antworten
-
Decreased scan time
-
Increased sensitivity to flow
-
Volume acquisitions possible
-
All of the above
Frage 33
Frage
Which of the following is a disadvantage of a gradient echo pulse sequence
Antworten
-
Decreased signal to noise ratio
-
Increased sensitivity to magnetic susceptibility artifacts
-
Increased gradient noise
-
All of the above
Frage 34
Frage
The gradient echo pulse sequence that produces true T2 image weighting
is known as
Antworten
-
SSFP
-
T2 FFE
-
PSIF
-
All of the above
Frage 35
Frage
The gradient echo pulse sequence that is characterized by an echo time
that is longer than its repetition time is known as
Antworten
-
Echo planar
-
Steady state free precession
-
Spin echo
-
Fast spin echo
Frage 36
Frage
The type of pulse sequence that fills all lines of K space per TR
is known as
Antworten
-
Fast spin echo
-
Steady state free precession
-
Echo planar
-
Spin echo
Frage 37
Frage
In an echo planar pulse sequence, using a long TE produces what type of
weighting
Antworten
-
Tl weighting
-
T2 weighting
-
Proton density weighting
-
None of the above
Frage 38
Frage
In an echo planar pulse sequence, pre-inverting tissue with a 180 degree RF
pulse before excitation produces what type of image weighting
Antworten
-
Tl weighting
-
T2 weighting
-
Proton density weighting
-
None of the above
Frage 39
Frage
In an echo planar pulse sequence, proton density weighting can be produced
by which of the following techniques
Antworten
-
Applying a 180 degree RF pulse to pre-invert tissue before excitation
-
Using a short TE
-
Using a long TE
-
Using a 180 degree rephasing pulse
Frage 40
Frage
Figure 5-1 is a diagram showing what type of pulse sequence
Antworten
-
Partial saturation
-
Spin echo
-
Inversion recovery
-
Gradient echo
Frage 41
Frage
Figure 5-2 is a diagram showing what type of pulse sequence
Antworten
-
Partial saturation
-
Spin echo
-
Inversion recovery
-
Gradient echo
Frage 42
Frage
Figure 5-3 is a diagram showing what type of pulse sequence
Antworten
-
Partial saturation
-
Spin echo
-
Inversion recovery
-
Gradient echo
Frage 43
Frage
Figure 5-4 is a diagram showing what type of pulse sequence
Antworten
-
Partial saturation
-
Spin echo
-
Inversion recovery
-
Gradient Echo
Frage 44
Frage
Which of the following methods can reduce blurring in a fast spin echo
pulse sequence
Antworten
-
Reduce echo train length
-
Reduce resolution
-
Reduce TR
-
Reduce effective TE
Frage 45
Frage
During a fast spin echo pulse sequence, which lines of k space are filled by
the gradients performed closest to the effective TE
Antworten
-
Central lines
-
Outer lines
-
Negative lines only
-
Positive lines only
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