ARRT MRI Mock Exam Registry With
100% Correct And Verified Answers
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 - Correct 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 - Correct Answer-Decreases
A magnetic vector possesses attributes of both __________ and
_____________.
A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
D. Magnitude; direction - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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
, C. Standard (universal)
D. Enteric
E. Contact - Correct Answer-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; active
B. Steel; active
C. Copper; passive
D. Steel; passive
E. Lead; active - Correct Answer-Steel; passive
If the TR in a gradient echo sequence is less than the T2 (or T2*), the
resulting condition is known as:
A. Spin down
B. Steady state
C. Spin dephasement
D. Thermal equilibrium - Correct Answer-Steady state
Which type of blood cell is responsible for phagocytosis?
A. Leukocyte
B. Erythrocyte
C. Lymphocyte
D. Platelet - Correct Answer-Leukocyte
Which of the following, in an MRA sequence, aids in minimizing the loss of
signal due to dephasing within a voxel:
A. Long TE
B. Short TR
C. Smaller voxel size
D. Short TE
E. C and D - Correct Answer-C and D
In order to acquire an intracranial arterial blood flow sequence, a
presaturation pulse would be applied in which location?
A. Below the heart
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Vendarsol. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $19.99. You're not tied to anything after your purchase.