Artifacts chart

Question 1

flow motion

Answer 1

axis: phase

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

Question 2

chemical shift

Answer 2

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

Question 3

out of phase artefact

Answer 3

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

Question 4

aliasing

Answer 4

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

Question 5

Zipper

Answer 5

axis: frequency
remedy: call engineer

Question 6

magnetic susceptibility

Answer 6

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

Question 7

shading

Answer 7

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

Question 8

patient motion

Answer 8

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

Question 9

Cross talk

Answer 9

axis- slice select

remedy: none