Spoiled
gradient echo sequences use a spoiler
gradient on the
slice select axis during the end module to destroy any remaining
transverse magnetization after the
readout gradient, which is the case for short repetition times.
As a result, only z-magnetization remains during a subsequent
excitation. This types of
sequences use semi-random changes in the
phase of
radio frequency pulses to produce a spatially independent
phase shift.
Companies use different
acronyms to describe certain techniques.
Different terms for these gradient echo pulse sequences:
CE-FFE-T1 Contrast Enhanced Fast Field Echo with T1 Weighting,
GFE Gradient Field Echo,
FLASH Fast Low Angle Shot,
PS Partial Saturation,
RF spoiled FAST RF Spoiled Fourier Acquired Steady State Technique,
RSSARGE Radio Frequency Spoiled Steady State Acquisition Rewound Gradient Echo
S-GRE Spoiled Gradient Echo,
SHORT Short Repetition Techniques,
SPGR Spoiled Gradient Recalled (spoiled GRASS),
STAGE T1W T1 weighted Small Tip Angle Gradient Echo,
T1-FAST T1 weighted Fourier Acquired Steady State Technique,
T1-FFE T1 weighted Fast Field Echo.
In this context, 'contrast enhanced' refers to the
pulse sequence, it does not mean enhancement with a
contrast agent.