# Estimating tracts for a specific region

**URL:** https://community.mrtrix.org/t/estimating-tracts-for-a-specific-region/885
**Category:** Uncategorized
**Created:** [May 11, 2017, 12:21am UTC](https://community.mrtrix.org/t/estimating-tracts-for-a-specific-region/885 "2017-05-11T00:21:04Z")
**Posts on this page:** 1
**Showing post:** 4

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### 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 13, 2019, 11:42am UTC](https://community.mrtrix.org/t/estimating-tracts-for-a-specific-region/885/4 "2019-11-13T11:42:44Z")

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If I understand what you mean correctly, this should do it:

```auto
tckmap your_tracks.tck -template your_inclusion_ROI.mif - | mrcalc - your_inclusion_ROI.mif -mult final_map.mif

```

Essentially: use `tckmap` to create an image of streamline counts for your tracks in ROI space, then multiply that by your ROI image itself. Is this what you were after?

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