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MRI Forum: How does TE affect DWI acquis ...
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  Category:  Sequences and Imaging Parameters		 Reply to this thread
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danilo Scelfo

Wed. 29 Sep.10,
12:15
How does TE affect DWI acquisition?
Hi folk! Just a breath question: how does TE affect conventional sequence (single shot SE-EPI) for DWI acquisition? In particular, how would two acquisitions differ from each other if acquired with TE=90/106ms respectively (being equal all the other parameters, i.e. TR=11s, same FOV, …)? Thanks for any opinion you will give me. Danilo.
Jacob Newton

Thu. 7 Oct.10,
19:22
 I never tried to shorten only the echo time while keeping all other parameters the same, but I would expect a change in SNR and artifact appearance. I would use parallel imaging methods to get a shortest possible echo time. Parallel imaging provides DWI with shorter echo trains associated with further reduction of the echo and repetition times, which reduces susceptibility effects and also image blurring. Additionally, the shorter echo time may lead to changes in ADC measurement.
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  Category:  Sequences and Imaging Parameters		 Reply to this thread
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