# Dynamic seeding

**URL:** <https://community.mrtrix.org/t/dynamic-seeding/1309>\
**Category:** Uncategorized\
**Created:** [November 14, 2017, 10:32am UTC](https://community.mrtrix.org/t/dynamic-seeding/1309 "2017-11-14T10:32:06Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![mccolgan](https://community.mrtrix.org/user_avatar/community.mrtrix.org/mccolgan/32/1851_2.png) [@mccolgan](https://community.mrtrix.org/u/mccolgan)\
**Post date:** [November 14, 2017, 10:32am UTC](https://community.mrtrix.org/t/dynamic-seeding/1309/1 "2017-11-14T10:32:06Z")

</div>

Dear experts,

Does dynamic seeding need to be used in conjunction with ACT. I am unable to use ACT on my data as I don’t have phase encoding information however I want to use dynamic seeding, is this okay to do using the following commands (the output looks sensible);

tckgen WM\_FODs.mif -seed\_dynamic WM\_FODs.mif -select 5000000 tracks\_DYM.tck -force

tcksift2 tracks\_DYM.tck WM\_FODs.mif sift\_weights\_DYM.txt -force

tck2connectome tracks\_DYM.tck -tck\_weights\_in sift\_weights\_DYM.txt node.nii.gz connectome\_DYM.csv -zero -force

Thanks

Peter

---

<div class="post-metadata">

**Author:** ![jdtournier](https://community.mrtrix.org/user_avatar/community.mrtrix.org/jdtournier/32/2594_2.png) [@jdtournier](https://community.mrtrix.org/u/jdtournier)\
**Post date:** [November 14, 2017, 2:48pm UTC](https://community.mrtrix.org/t/dynamic-seeding/1309/2 "2017-11-14T14:48:51Z")

</div>

Yes, the dynamic seeding mechanism is independent of ACT, so that’s no problem.

However, do bear in mind that not using ACT for connectome construction means that a potentially very significant number of streamlines will not be taken into account for the final connectome, or contribute to the wrong connections – primarily due to erroneous termination. For these reasons, I would strongly urge you to use ACT if you possibly can.

---

<div class="post-metadata">

**Author:** ![ZhangHui](https://community.mrtrix.org/user_avatar/community.mrtrix.org/zhanghui/32/1520_2.png) [@ZhangHui](https://community.mrtrix.org/u/ZhangHui)\
**Post date:** [June 19, 2020, 4:47pm UTC](https://community.mrtrix.org/t/dynamic-seeding/1309/3 "2020-06-19T16:47:34Z")

</div>

I saw the answer in the other post. Thank the MRtrix team very much!