ARRT MRI Mock Registry
Questions & Verified Answers
100%
VENC - correct answer ✔✔When imaging a geriatric patient, while performing a PCA MRA
sequence, what imaging parameter might the operator adjust?
A. Field of view
B. Presaturation band location
C. Slice thickness
D. VENC
E. Contrast injection rate
Decreases - correct answer ✔✔As the number of phase encodings is increased from 256 to 512,
SNR (signal to noise ratio):
A. Increases
B. Decreases
C. Doubles
D. Does not change
E. Quadruples
Magnitude; direction - correct answer ✔✔A magnetic vector possesses attributes of both
__________ and _____________.
A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
,D. Magnitude; direction
Hydrogen - correct answer ✔✔What element in the body is the principal nucleus utilized in
clinical MR imaging?
A. Helium
B. Hydrogen
C. Oxygen
D. Calcium
A 180° pulse followed by a 90°/180° combination - correct answer ✔✔Which of the following
best describes an IR sequence?
A. A 180° pulse followed by a 90°/180° combination
B. A 90° pulse followed by a 180° pulse
C. A train of gradient echoes
D. A train of spin echoes
Incoherent gradient echo - correct answer ✔✔Gradient echo sequences requiring high signal
from fluid are known as all of the following EXCEPT:
A. T2* gradient echo
B. Steady-state gradient echo
C. Coherent gradient echo
D. Incoherent gradient echo
Eyes - correct answer ✔✔The medial and lateral rectus muscles are located in the:
A. Ears
B. Posterior pelvic region
C. Proximal calves
,D. Eyes
E. Superior shoulder regions
F. Soft tissues of the neck
A, D and E only
Reducing the number of lines filled in k-space reduces the number of phase encoding steps,
resulting in shorter scan time, an increase in overall SNR, but a decrease in spatial resolution. -
correct answer ✔✔Reducing the number of lines filled in k-space will produce an image:
A. With a decrease in spatial resolution
B. With a increase in spatial resolution
C. With an decrease in overall SNR
D. With an increase in overall SNR
E. With a reduced overall scan time
F. B, C and E only
G. A, D and E only
0.88mm - correct answer ✔✔The smallest object that can be resolved in an image acquired
with a 24cm FOV and a 272 x 272 matrix is _________ mm.
A. 0.76mm
B. 0.88mm
C. 0.93mm
D. 1.13mm
E. 1.24mm
, Short - correct answer ✔✔To produce an image based on differences in T1, the time interval
between 90° excitation pulses should be:
A. Long
B. Short
C. Refocussed
D. Inverted
Emitted from - correct answer ✔✔The energy used to form MRI images is ____________ the
patient's tissues.
A. Emitted from
B. Attenuated by
C. Amplified from
D. Reflected off
Standard (universal) - correct answer ✔✔Referencing the Centers for Disease Control and
Prevention (CDC), what type of isolation precautions should be used for HIV-positive patients in
the MRI suite?
A. Respiratory
B. Droplet
C. Standard (universal)
D. Enteric
E. Contact
Steel; passive - correct answer ✔✔___________ could be used to line the walls and/or floors of
the MR magnet room to reduce the fringe field, and is defined as __________ shielding.
A. Copper; active
B. Steel; active
C. Copper; passive
Questions & Verified Answers
100%
VENC - correct answer ✔✔When imaging a geriatric patient, while performing a PCA MRA
sequence, what imaging parameter might the operator adjust?
A. Field of view
B. Presaturation band location
C. Slice thickness
D. VENC
E. Contrast injection rate
Decreases - correct answer ✔✔As the number of phase encodings is increased from 256 to 512,
SNR (signal to noise ratio):
A. Increases
B. Decreases
C. Doubles
D. Does not change
E. Quadruples
Magnitude; direction - correct answer ✔✔A magnetic vector possesses attributes of both
__________ and _____________.
A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
,D. Magnitude; direction
Hydrogen - correct answer ✔✔What element in the body is the principal nucleus utilized in
clinical MR imaging?
A. Helium
B. Hydrogen
C. Oxygen
D. Calcium
A 180° pulse followed by a 90°/180° combination - correct answer ✔✔Which of the following
best describes an IR sequence?
A. A 180° pulse followed by a 90°/180° combination
B. A 90° pulse followed by a 180° pulse
C. A train of gradient echoes
D. A train of spin echoes
Incoherent gradient echo - correct answer ✔✔Gradient echo sequences requiring high signal
from fluid are known as all of the following EXCEPT:
A. T2* gradient echo
B. Steady-state gradient echo
C. Coherent gradient echo
D. Incoherent gradient echo
Eyes - correct answer ✔✔The medial and lateral rectus muscles are located in the:
A. Ears
B. Posterior pelvic region
C. Proximal calves
,D. Eyes
E. Superior shoulder regions
F. Soft tissues of the neck
A, D and E only
Reducing the number of lines filled in k-space reduces the number of phase encoding steps,
resulting in shorter scan time, an increase in overall SNR, but a decrease in spatial resolution. -
correct answer ✔✔Reducing the number of lines filled in k-space will produce an image:
A. With a decrease in spatial resolution
B. With a increase in spatial resolution
C. With an decrease in overall SNR
D. With an increase in overall SNR
E. With a reduced overall scan time
F. B, C and E only
G. A, D and E only
0.88mm - correct answer ✔✔The smallest object that can be resolved in an image acquired
with a 24cm FOV and a 272 x 272 matrix is _________ mm.
A. 0.76mm
B. 0.88mm
C. 0.93mm
D. 1.13mm
E. 1.24mm
, Short - correct answer ✔✔To produce an image based on differences in T1, the time interval
between 90° excitation pulses should be:
A. Long
B. Short
C. Refocussed
D. Inverted
Emitted from - correct answer ✔✔The energy used to form MRI images is ____________ the
patient's tissues.
A. Emitted from
B. Attenuated by
C. Amplified from
D. Reflected off
Standard (universal) - correct answer ✔✔Referencing the Centers for Disease Control and
Prevention (CDC), what type of isolation precautions should be used for HIV-positive patients in
the MRI suite?
A. Respiratory
B. Droplet
C. Standard (universal)
D. Enteric
E. Contact
Steel; passive - correct answer ✔✔___________ could be used to line the walls and/or floors of
the MR magnet room to reduce the fringe field, and is defined as __________ shielding.
A. Copper; active
B. Steel; active
C. Copper; passive
