ARRT MRI Mock Registry Questions and
Answers (2022/2023) Already Graded A
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 ✔✔VENC
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 ✔✔Decreases
A magnetic vector possesses attributes of both __________ and _____________.
,A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
D. Magnitude; direction ✔✔Magnitude; direction
What element in the body is the principal nucleus utilized in clinical MR imaging?
A. Helium
B. Hydrogen
C. Oxygen
D. Calcium ✔✔Hydrogen
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 ✔✔A 180° pulse followed by a 90°/180° combination
,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 ✔✔Incoherent gradient echo
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 ✔✔Eyes
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 ✔✔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.
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 ✔✔0.88mm
Answers (2022/2023) Already Graded A
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 ✔✔VENC
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 ✔✔Decreases
A magnetic vector possesses attributes of both __________ and _____________.
,A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
D. Magnitude; direction ✔✔Magnitude; direction
What element in the body is the principal nucleus utilized in clinical MR imaging?
A. Helium
B. Hydrogen
C. Oxygen
D. Calcium ✔✔Hydrogen
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 ✔✔A 180° pulse followed by a 90°/180° combination
,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 ✔✔Incoherent gradient echo
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 ✔✔Eyes
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 ✔✔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.
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 ✔✔0.88mm
