(PSIF) A heavily T2* weighted contrast enhanced gradient echo (mirrored FISP) technique.
Because TE is relatively long, there are much flow artifacts and less signal to noise.
In normal gradient echo techniques a FID-signal results after the RF pulses. This FID is rephased very fast and just before the next FID follows a spin echo signal. The SE is spoiled in FLASHsequences, but with PSIF sequences, only the SE is measured, not the FID.
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