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Co-authored-by: Taylor Salo <[email protected]>
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mattcieslak and tsalo authored Nov 19, 2024
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20 changes: 9 additions & 11 deletions docs/builtin_workflows.rst
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Expand Up @@ -529,9 +529,8 @@ To skip this step in your workflow, you can modify an existing recon pipeline by

.. _connectivity_atlases:

*******
Atlases
*******
=======

The following atlases are included in ``qsirecon``.
This means you do not need to add a ``--datasets`` argument to your command line,
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.. _custom_atlases:

Using custom atlases
^^^^^^^^^^^^^^^^^^^^
--------------------

It's possible to use your own atlases provided you organize the atlases into BIDS-Atlas datasets.
Users can control which atlases are used with the ``--atlases`` and ``--datasets`` parameters.
Expand All @@ -607,9 +606,8 @@ It is essential that your images are in the LPS+ orientation and have the sform
**Be sure to check for alignment and orientation** in your outputs.


*********************
Connectivity Measures
*********************
=====================

Connectivity measures are bundled together in binary ``.mat`` files,
rather than as atlas- and measure-specific tabular files.
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MRtrix3 Connectivity Measures
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-----------------------------

MRtrix3 connectivity workflows produce 4 structural connectome outputs for each atlas.
The 4 connectivity matrix outputs are

* *radiusN.count.connectivity*: raw streamline count based matrix
* *sift.radiusN.count.connectivity*: sift-weighted streamline count based matrix
* *radiusN.meanlength.connectivity*: a matrix containing mean length of raw streamlines
* *sift.radiusN.meanlength.connectivity*: a matrix containing mean length of sifted output
* *atlas_<atlas>_radius<N>.count.connectivity*: raw streamline count based matrix
* *atlas_<atlas>_sift.radius<N>.count.connectivity*: sift-weighted streamline count based matrix
* *atlas_<atlas>_radius<N>.meanlength.connectivity*: a matrix containing mean length of raw streamlines
* *atlas_<atlas>_sift.radius<N>.meanlength.connectivity*: a matrix containing mean length of sifted output

The number ``N`` in ``radiusN`` indicates how many mm the algorithm would search up from a
given streamline's endpoint for a cortical region. E.g., a radius of 2 indicates that
Expand All @@ -663,7 +661,7 @@ termination region could be up to 2mm from the endpoint.


DSI Studio Connectivity Measures
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
--------------------------------

DSI Studio has two options for how to count streamlines as "connnecting" a region pair.
``pass`` counts a connection if any part of a streamline intersects two regions.
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