# For FBA analysis
**URL:** https://community.mrtrix.org/t/for-fba-analysis/8769
**Category:** Uncategorized
**Created:** [May 20, 2026, 9:21am UTC](https://community.mrtrix.org/t/for-fba-analysis/8769 "2026-05-20T09:21:47Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@qianjinbo-creat](https://community.mrtrix.org/u/qianjinbo-creat)
#### Post date: [May 20, 2026, 9:21am UTC](https://community.mrtrix.org/t/for-fba-analysis/8769/1 "2026-05-20T09:21:47Z")
Some cerebellar DTI scans are complete while others are incomplete. Will this affect the cerebral FBA analysis?
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### Author:  [@szan](https://community.mrtrix.org/u/szan)
#### Post date: [May 21, 2026, 4:26am UTC](https://community.mrtrix.org/t/for-fba-analysis/8769/2 "2026-05-21T04:26:34Z")
Hi qianjinbo-creat,
I would say it will not affect your ability to perform statistical inference in the cerebral area. However, your case versus having all the scans with complete cerebellum may yield a different FBA outcome in terms of corrected p-values (including cerebral fixels). That is because fixel-fixel connectivity is assessed within the whole fixel mask, and leveraged for statistical enhancement within a permutation testing framework.
Also, you may want to deal with the fact that some of your DWI data do not include the whole cerebellum and consider using either -mask or -posthoc option when running the [fixelcfestats command](https://mrtrix.readthedocs.io/en/dev/reference/commands/fixelcfestats.html) to exclude the cerebellum entirely from either processing or statistical inference.
Simone
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### Author:  [@WilliamFCB](https://community.mrtrix.org/u/WilliamFCB)
#### Post date: [May 21, 2026, 4:54am UTC](https://community.mrtrix.org/t/for-fba-analysis/8769/3 "2026-05-21T04:54:54Z")
Just to add. In processing your data for fixel analysis, at some point, you would compute a “template mask”, which is the intersection of all subject masks in template space. This would deal with the varying brain coverage. Cheers, William