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ARRT MRI Final Exam/ Actual Exam Questions with Correct Verified Answers – Latest Update 2024.

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ARRT MRI Final Exam/ Actual Exam Questions with Correct Verified Answers – Lates t Update 2024.

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  • August 25, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ARRT MRI
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ASSIGNMENT7
ARRT MRI Final Exam/ Actual Exam Questions with
Correct Verified Answers – Latest Update 2024.


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




pg. 1

,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


pg. 2

,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



pg. 3

, B. Droplet

C. Standard (universal)

D. Enteric

E. Contact - 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 - 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 - ANSWER - Steady state



Which type of blood cell is responsible for phagocytosis?

A. Leukocyte

B. Erythrocyte

C. Lymphocyte

D. Platelet - 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




pg. 4

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