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Ultra-short TE
•
Radial (and spiral) trajectory
very fast and efficient
•
TE can be further minimised
with non-selective or half RF
pulses and ramp sampling
•
TE can be limited to switching
capability of Tx/Rx
•
TE ≤ 0.1 ms (100 µs) said to
be ‘ultrashort’
•
In some methods (ZTE and PETRA) gradients ramped up
prior to sampling