Respiratory compensation ______:

Number of slices per TR may be increased

Physics 2 Quiz 2.3

10 Questions | By Breanna | Updated: Mar 18, 2022 | Attempts: 32

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Questions and Answers

1.

Moire' artifact is a combination of wrap and field inhomogeneity in spin echo sequences.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
2.

To reduce chemical shift artifact, use the widest receive bandwidth possible and keep good SNR and use the smallest FOV possible.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
3.

If you are acquiring 8 slices in an acquistion and you interleave them, how are the slices acquired?
- A.
  
  1, 3, 5, 7 then 2, 4, 6, 8
- B.
  
  1, 2, 3, 4, then 5, 6, 7, 8
- C.
  
  1, 2, 5, 8, then 3, 4, 6, 7
- D.
  
  1, 4, 3, 6 then 2, 4, 6, 8
Correct Answer
A. 1, 3, 5, 7 then 2, 4, 6, 8
4.

Cardiac gating monitors cardiac motion by coordinating the excitation pulse with the _____ wave
- A.
  
  S
- B.
  
  T
- C.
  
  P
- D.
  
  R
- E.
  
  Q
Correct Answer
D. R
5.

What sequence weighting is affected the most by magnetic susceptibility artifacts?
- A.
  
  T2 FSE
- B.
  
  T1 FSE
- C.
  
  Inversion Recovery
- D.
  
  Gradient Echo
Correct Answer
D. Gradient Echo
6.

Respiratory compensation ______:
- A.
  
  Ghosting artifact increased
- B.
  
  Does affect scan time
- C.
  
  Does not affect scan time
- D.
  
  Number of slices per TR may be increased
Correct Answer
C. Does not affect scan time
7.

At 1.0T, fat precesses at ______less than water.
- A.
  
  110Hz
- B.
  
  220Hz
- C.
  
  155Hz
- D.
  
  147Hz
- E.
  
  160Hz
Correct Answer
D. 147Hz
8.

Aliasing along the phase axis is known as?
- A.
  
  Aliasing
- B.
  
  Phase wrap
- C.
  
  Wrap around
- D.
  
  Frequency wrap
- E.
  
  Foldover wrap
Correct Answer
B. Phase wrap
9.

What produces a ring of dark signal around certain organs where fat and water interfaces occur within same voxel?
- A.
  
  Chemical mis-registration
- B.
  
  Shading artifact
- C.
  
  Magic angle artifact
- D.
  
  Moire artifact
- E.
  
  Zipper artifact
Correct Answer
A. Chemical mis-registration

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Mar 18, 2022

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Jun 05, 2017

Quiz Created by
Breanna

Physics 2 Quiz 2.3

Moire' artifact is a combination of wrap and field inhomogeneity in spin echo sequences.

To reduce chemical shift artifact, use the widest receive bandwidth possible and keep good SNR and use the smallest FOV possible.

If you are acquiring 8 slices in an acquistion and you interleave them, how are the slices acquired?

Cardiac gating monitors cardiac motion by coordinating the excitation pulse with the _____ wave

What sequence weighting is affected the most by magnetic susceptibility artifacts?

Respiratory compensation ______:

At 1.0T, fat precesses at ______less than water.

Aliasing along the phase axis is known as?

What produces a ring of dark signal around certain organs where fat and water interfaces occur within same voxel?