How to fix Artifacts Flashcards
1
Q
truncation
A
increase number K space lines (phase matrix)
causes increase in scan time
2
Q
flow
A
use pre-sat pulses
increase to SAR
3
Q
chemical shift
also, where does it occur
A
occurs along the frequency axis
increase RBW
decrease in SNR and minimum TE results
4
Q
out of phase artifact/aliasing
A
use no phase wrap, or increase FOV
also increases scan time
5
Q
zipper
A
call engineer for repair
6
Q
magnetic susceptibility
A
use spine echoes
remove metal if possible
use parallel imaging
7
Q
motion
A
pre sat pulses
gating
increased scan time results
8
Q
cross talk
A
larger slice gaps
9
Q
moire
A
use spin echoes
make sure they are not touching bore
10
Q
magic angle
A
change TE
change position of anatomy being scanned
