# T Value Map

**URL:** <https://community.mrtrix.org/t/t-value-map/8741>\
**Category:** Uncategorized\
**Created:** [April 13, 2026, 12:01am UTC](https://community.mrtrix.org/t/t-value-map/8741 "2026-04-13T00:01:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![H.A.N.K](https://community.mrtrix.org/user_avatar/community.mrtrix.org/h.a.n.k/32/4793_2.png) [@H.A.N.K](https://community.mrtrix.org/u/H.A.N.K)\
**Post date:** [April 13, 2026, 12:01am UTC](https://community.mrtrix.org/t/t-value-map/8741/1 "2026-04-13T00:01:21Z")

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Hi All,

I used TractSeg to extract a fixel mask for my tract of interest, and when examining the resulting t-value map, I was uncertain which value should be interpreted as the actual “t value,” given that the map is presented on a colour scale ranging from negative to positive values. I apologise if this is a simple question; I just want to make sure I am interpreting the output appropriately.