Artifacts chart Flashcards

1
Q

flow motion

A

axis: phase

remedy: -swap phase and freq-may need anti-aliasing
- gating
- pre-saturation
- gradient moment rephasing

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2
Q

chemical shift

A

axis: frequency
remedy: -increase bandwidth
- reduce FOV
- use chemical saturation

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3
Q

out of phase artefact

A

axis: phase and freq
remedy: select a TE at periodicity of fat and water

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4
Q

aliasing

A

axis: frequency and phase
remedy: -no frequency wrap
- no phase wrap
- enlarge FOV

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5
Q

Zipper

A

axis: frequency
remedy: call engineer

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6
Q

magnetic susceptibility

A

axis: phase and freq
remedy: -use spine echo
- remove metal

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7
Q

shading

A

axis: phase and freq
remedy: -check shim
- load coil correctly

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8
Q

patient motion

A

axis: phase
remedy: -use anti-spasmodics
- immobilize patient
- counseling of patient
- all remedies for flow motion
- sedation

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9
Q

Cross talk

A

axis- slice select

remedy: none

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