ARRT MRI Mock Registry Exam Ques ons and answers
Rated A+ 2025/2026 With complete solu on NEW!!
2025/2026
When imaging a geriatric pa ent, while performing a PCA MRA sequence, what imaging
parameter might the operator adjust?
A. Field of view
B. Presatura on band loca on
C. Slice thickness
D. VENC
E. Contrast injec on rate - Answers VENC
As the number of phase encodings is increased from 256 to 512, SNR (signal to noise ra o):
A. Increases
B. Decreases
C. Doubles
D. Does not change
E. Quadruples - Answers Decreases
A magne c vector possesses a4ributes of both __________ and _____________.
A. Strength; magnitude
B. Direc on; purpose
C. Strength; flow
D. Magnitude; direc on - Answers Magnitude; direc on
What element in the body is the principal nucleus u lized in clinical MR imaging?
,A. Helium
B. Hydrogen
C. Oxygen
D. Calcium - Answers Hydrogen
Which of the following best describes an IR sequence?
A. A 180° pulse followed by a 90°/180° combina on
B. A 90° pulse followed by a 180° pulse
C. A train of gradient echoes
D. A train of spin echoes - Answers A 180° pulse followed by a 90°/180° combina on
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 - Answers 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. SoF ssues of the neck - Answers Eyes
,Reducing the number of lines filled in k-space will produce an image:
A. With a decrease in spa al resolu on
B. With a increase in spa al resolu on
C. With an decrease in overall SNR
D. With an increase in overall SNR
E. With a reduced overall scan me
F. B, C and E only
G. A, D and E only - Answers A, D and E only
Reducing the number of lines filled in k-space reduces the number of phase encoding steps,
resul ng in shorter scan me, an increase in overall SNR, but a decrease in spa al resolu on.
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 - Answers 0.88mm
To produce an image based on differences in T1, the me interval between 90° excita on
pulses should be:
A. Long
B. Short
C. Refocussed
D. Inverted - Answers Short
, The energy used to form MRI images is ____________ the pa ent's ssues.
A. Emi4ed from
B. A4enuated by
C. Amplified from
D. Reflected off - Answers Emi4ed from
Referencing the Centers for Disease Control and Preven on (CDC), what type of isola on
precau ons should be used for HIV-posi ve pa ents in the MRI suite?
A. Respiratory
B. Droplet
C. Standard (universal)
D. Enteric
E. Contact - Answers Standard (universal)
___________ 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; ac ve
B. Steel; ac ve
C. Copper; passive
D. Steel; passive
E. Lead; ac ve - Answers Steel; passive
If the TR in a gradient echo sequence is less than the T2 (or T2*), the resul ng condi on is
known as:
A. Spin down
B. Steady state
Rated A+ 2025/2026 With complete solu on NEW!!
2025/2026
When imaging a geriatric pa ent, while performing a PCA MRA sequence, what imaging
parameter might the operator adjust?
A. Field of view
B. Presatura on band loca on
C. Slice thickness
D. VENC
E. Contrast injec on rate - Answers VENC
As the number of phase encodings is increased from 256 to 512, SNR (signal to noise ra o):
A. Increases
B. Decreases
C. Doubles
D. Does not change
E. Quadruples - Answers Decreases
A magne c vector possesses a4ributes of both __________ and _____________.
A. Strength; magnitude
B. Direc on; purpose
C. Strength; flow
D. Magnitude; direc on - Answers Magnitude; direc on
What element in the body is the principal nucleus u lized in clinical MR imaging?
,A. Helium
B. Hydrogen
C. Oxygen
D. Calcium - Answers Hydrogen
Which of the following best describes an IR sequence?
A. A 180° pulse followed by a 90°/180° combina on
B. A 90° pulse followed by a 180° pulse
C. A train of gradient echoes
D. A train of spin echoes - Answers A 180° pulse followed by a 90°/180° combina on
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 - Answers 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. SoF ssues of the neck - Answers Eyes
,Reducing the number of lines filled in k-space will produce an image:
A. With a decrease in spa al resolu on
B. With a increase in spa al resolu on
C. With an decrease in overall SNR
D. With an increase in overall SNR
E. With a reduced overall scan me
F. B, C and E only
G. A, D and E only - Answers A, D and E only
Reducing the number of lines filled in k-space reduces the number of phase encoding steps,
resul ng in shorter scan me, an increase in overall SNR, but a decrease in spa al resolu on.
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 - Answers 0.88mm
To produce an image based on differences in T1, the me interval between 90° excita on
pulses should be:
A. Long
B. Short
C. Refocussed
D. Inverted - Answers Short
, The energy used to form MRI images is ____________ the pa ent's ssues.
A. Emi4ed from
B. A4enuated by
C. Amplified from
D. Reflected off - Answers Emi4ed from
Referencing the Centers for Disease Control and Preven on (CDC), what type of isola on
precau ons should be used for HIV-posi ve pa ents in the MRI suite?
A. Respiratory
B. Droplet
C. Standard (universal)
D. Enteric
E. Contact - Answers Standard (universal)
___________ 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; ac ve
B. Steel; ac ve
C. Copper; passive
D. Steel; passive
E. Lead; ac ve - Answers Steel; passive
If the TR in a gradient echo sequence is less than the T2 (or T2*), the resul ng condi on is
known as:
A. Spin down
B. Steady state
