ARRT REGISTRY EXAM REVIEW QUESTIONS
AND ANSWERS VERIFIED SOLUTIONS
◉ 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. Answer: 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. Answer: Decreases
◉ A magnetic vector possesses attributes of both __________ and
_____________.
A. Strength; magnitude
B. Direction; purpose
,C. Strength; flow
D. Magnitude; direction. Answer: Magnitude; direction
◉ What element in the body is the principal nucleus utilized in
clinical MR imaging?
A. Helium
B. Hydrogen
C. Oxygen
D. Calcium. Answer: 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. Answer: 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. Answer: 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. Answer: 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. Answer: 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. Answer: 0.88mm
◉ 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. Answer: Short
◉ The energy used to form MRI images is ____________ the
patient's tissues.
A. Emitted from
B. Attenuated by
C. Amplified from
D. Reflected off. Answer: Emitted from
◉ 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
AND ANSWERS VERIFIED SOLUTIONS
◉ 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. Answer: 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. Answer: Decreases
◉ A magnetic vector possesses attributes of both __________ and
_____________.
A. Strength; magnitude
B. Direction; purpose
,C. Strength; flow
D. Magnitude; direction. Answer: Magnitude; direction
◉ What element in the body is the principal nucleus utilized in
clinical MR imaging?
A. Helium
B. Hydrogen
C. Oxygen
D. Calcium. Answer: 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. Answer: 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. Answer: 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. Answer: 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. Answer: 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. Answer: 0.88mm
◉ 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. Answer: Short
◉ The energy used to form MRI images is ____________ the
patient's tissues.
A. Emitted from
B. Attenuated by
C. Amplified from
D. Reflected off. Answer: Emitted from
◉ 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
