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Spoiling (or ‘incoherent steady state’)
–
Removes residual transverse signal
–
Use RF (or gradient) spoiling
RF phase angle increased to produce net cancellation of
transverse magnetization
–
Incomplete spoiling leads to ‘FLASH-bands’
FLASH (Turbo-FLASH)
SPGR (FSPGR)
RF-FAST
(
)
[
]
(
)
(
)
1
*
2
1
/
exp
cos 1
/
exp
/
exp 1 sin
T TR
T TE
T TR
S
−
−
−
− −
∝
α
α
Steady State Sequences