ARRT MRI Mock Registry Questions and
Answers Latest Version Already Passed
What is the primary purpose of using a local coil in MRI?
A. To improve the magnetic field homogeneity
B. To reduce scan time
C. To prevent motion artifacts
✔✔D. To increase signal-to-noise ratio (SNR)
Which type of imaging sequence is most susceptible to magnetic susceptibility artifacts?
A. Fast spin-echo
B. Inversion recovery
✔✔C. Gradient echo
D. Spin-echo
Why is gadolinium contrast commonly used in MRI?
A. It increases scan time
B. It reduces patient discomfort
✔✔C. It improves tissue differentiation
1
,D. It shortens T2 relaxation
Which factor can help reduce motion artifacts in MRI?
A. Increasing TR
✔✔B. Using respiratory gating
C. Decreasing bandwidth
D. Increasing phase encoding steps
What happens if the field of view (FOV) is reduced while maintaining matrix size?
A. Image resolution decreases
✔✔B. Spatial resolution improves
C. SNR increases
D. Scan time decreases
Which gradient is primarily responsible for slice selection in MRI?
✔✔A. The z-gradient
B. The x-gradient
C. The y-gradient
2
,D. The frequency-encoding gradient
Why are inversion recovery sequences used in MRI?
✔✔A. To suppress specific tissue signals
B. To increase scan speed
C. To reduce T2* effects
D. To improve image contrast
Which parameter adjustment will increase the signal-to-noise ratio (SNR)?
✔✔A. Increasing the number of signal averages (NEX)
B. Decreasing TR
C. Reducing voxel size
D. Increasing phase encoding steps
What is the purpose of fat suppression in MRI?
✔✔A. To eliminate fat signal for better tissue contrast
B. To reduce scan time
C. To enhance magnetic susceptibility artifacts
3
, D. To improve T2* effects
What effect does increasing the echo time (TE) have on T2-weighted images?
A. It decreases T2 contrast
B. It reduces scan time
✔✔C. It enhances T2 contrast
D. It shortens T1 relaxation
Which factor determines the number of slices in a multi-slice MRI acquisition?
A. Flip angle
✔✔B. Repetition time (TR)
C. Echo spacing
D. Matrix size
How does parallel imaging affect scan time?
A. It increases SNR
B. It eliminates the need for phase encoding
C. It increases scan time
4
Answers Latest Version Already Passed
What is the primary purpose of using a local coil in MRI?
A. To improve the magnetic field homogeneity
B. To reduce scan time
C. To prevent motion artifacts
✔✔D. To increase signal-to-noise ratio (SNR)
Which type of imaging sequence is most susceptible to magnetic susceptibility artifacts?
A. Fast spin-echo
B. Inversion recovery
✔✔C. Gradient echo
D. Spin-echo
Why is gadolinium contrast commonly used in MRI?
A. It increases scan time
B. It reduces patient discomfort
✔✔C. It improves tissue differentiation
1
,D. It shortens T2 relaxation
Which factor can help reduce motion artifacts in MRI?
A. Increasing TR
✔✔B. Using respiratory gating
C. Decreasing bandwidth
D. Increasing phase encoding steps
What happens if the field of view (FOV) is reduced while maintaining matrix size?
A. Image resolution decreases
✔✔B. Spatial resolution improves
C. SNR increases
D. Scan time decreases
Which gradient is primarily responsible for slice selection in MRI?
✔✔A. The z-gradient
B. The x-gradient
C. The y-gradient
2
,D. The frequency-encoding gradient
Why are inversion recovery sequences used in MRI?
✔✔A. To suppress specific tissue signals
B. To increase scan speed
C. To reduce T2* effects
D. To improve image contrast
Which parameter adjustment will increase the signal-to-noise ratio (SNR)?
✔✔A. Increasing the number of signal averages (NEX)
B. Decreasing TR
C. Reducing voxel size
D. Increasing phase encoding steps
What is the purpose of fat suppression in MRI?
✔✔A. To eliminate fat signal for better tissue contrast
B. To reduce scan time
C. To enhance magnetic susceptibility artifacts
3
, D. To improve T2* effects
What effect does increasing the echo time (TE) have on T2-weighted images?
A. It decreases T2 contrast
B. It reduces scan time
✔✔C. It enhances T2 contrast
D. It shortens T1 relaxation
Which factor determines the number of slices in a multi-slice MRI acquisition?
A. Flip angle
✔✔B. Repetition time (TR)
C. Echo spacing
D. Matrix size
How does parallel imaging affect scan time?
A. It increases SNR
B. It eliminates the need for phase encoding
C. It increases scan time
4
