percentage signal change

Submitted by chouyiyu on
Dear DPARSF users,

I was wondering if DPARSF is converting the fmri signals from arbitary scanner uints into percentage signal change during the processing step.
I will appreciate it if you can let me know.
Thanks in advance !!

YY

YAN Chao-Gan

Fri, 07/12/2013 - 21:34

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No.

All the resutls will not be affected by the grand mean normalization.

Except ALFF and no standardization (not divided by mean (mALFF), nor z-standardized (zALFF)).

Best,

Chao-Gan
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