Don't know about #2. The bvals are definitely not normalized. The gradients must be normalized for each direction (not across directions). I suspect that they already will be.

doug

swoodman@nmr.mgh.harvard.edu wrote:

Hello all,

We have a question regarding DTI data we aquired a few years ago (2005-2006).

For those of you who use DTI sequences,

1.) Do you use normalized bvals/bvecs files or do you use the files that come direct from the scanner for each individual subject?

2.) When scanning on either bay 3 or 4, are the same bval/bvecs files used? ie is there a difference between magnets when using the same sequence?

Thanks for your help!

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