# Template\_mask in FBA

**URL:** https://community.mrtrix.org/t/template-mask-in-fba/8787
**Category:** Uncategorized
**Created:** [June 11, 2026, 2:03am UTC](https://community.mrtrix.org/t/template-mask-in-fba/8787 "2026-06-11T02:03:22Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![qianjinbo-creat](https://community.mrtrix.org/user_avatar/community.mrtrix.org/qianjinbo-creat/32/5312_2.png) [@qianjinbo-creat](https://community.mrtrix.org/u/qianjinbo-creat)
#### Post date: [June 11, 2026, 2:03am UTC](https://community.mrtrix.org/t/template-mask-in-fba/8787/1 "2026-06-11T02:03:22Z")

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In FBA analysis, should the template\_mask be generated using the masks of subjects that created the wmfod\_template, or the masks of all subjects?Thank you

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### Author: ![almatuschak](https://community.mrtrix.org/letter_avatar_proxy/v4/letter/a/dfb087/32.png) [@almatuschak](https://community.mrtrix.org/u/almatuschak)
#### Post date: [June 21, 2026, 11:32am UTC](https://community.mrtrix.org/t/template-mask-in-fba/8787/2 "2026-06-21T11:32:56Z")

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Hi! As I understand, the mask should be created from masks of ALL subjects in your analysis. You can read more on this here (step 11):

> **[Fibre density and cross-section - Multi-tissue CSD — MRtrix3 3.0 documentation](https://mrtrix.readthedocs.io/en/latest/fixel_based_analysis/mt_fibre_density_cross-section.html)**

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### Author: ![qianjinbo-creat](https://community.mrtrix.org/user_avatar/community.mrtrix.org/qianjinbo-creat/32/5312_2.png) [@qianjinbo-creat](https://community.mrtrix.org/u/qianjinbo-creat)
#### Post date: [June 23, 2026, 3:00am UTC](https://community.mrtrix.org/t/template-mask-in-fba/8787/3 "2026-06-23T03:00:48Z")

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OK!I understand