# Volume of Working memory fiber bundle

**URL:** <https://community.mrtrix.org/t/volume-of-working-memory-fiber-bundle/4616>\
**Category:** Uncategorized\
**Created:** [March 2, 2021, 2:06pm UTC](https://community.mrtrix.org/t/volume-of-working-memory-fiber-bundle/4616 "2021-03-02T14:06:27Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![rsmith](https://community.mrtrix.org/user_avatar/community.mrtrix.org/rsmith/32/2672_2.png) [@rsmith](https://community.mrtrix.org/u/rsmith)\
**Post date:** [March 15, 2021, 3:59am UTC](https://community.mrtrix.org/t/volume-of-working-memory-fiber-bundle/4616/2 "2021-03-15T03:59:54Z")

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Hi Abir,

If you want just the volume of the fibre bundle in terms of the number of voxels intersected, then there is absolutely no need to be interfacing with the `afdconnectivity` command. The purpose of that command is both to integrate microstructural fibre density information into the quantification (which is not want you want), and to obtain an estimate of fibre bundle _cross-sectional area_ (which has fundamentally different dimensions to volume).

I (eventually) responded to your issues with calculating volume in [this thread](https://community.mrtrix.org/t/calculating-the-tract-volume/3936/7); I also wrote a little one-liner in [another thread](https://community.mrtrix.org/t/volume-of-fiber-bundle/4600/6) for going from a voxel count to a volume in mm3.

Rob

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