3dDWItoDT output check

AFNI Message Board
1

Hi AFNI experts,

This might be a simplistic question, but I cannot figure out 1) how to check the output of 3dDWItoDT and 2) what to specifically look for.

Some insight would be awesome!
Thanks,
Steph

2

Hi, Steph-

There are several things to look at, such as where FA>0.2 (-> should match WM in ~healthy human adults). You can also look at DEC maps. Some description in the FATCAT_DEMO2 are provided here:
https://afni.nimh.nih.gov/pub/dist/doc/htmldoc/tutorials/fatcat_prep/Postprocessing_I.html#fat-proc-dwi-to-dt-gradfliptest

–pt