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Cortical Parcellation

The FreeSurfer utilities mris_ca_train and mris_ca_label together implement a technique for automatically assigning a neuroanatomical label to each location on a cortical surface model based on probabilistic information estimated from a manually labeled training set (made using FreeSurfer). This procedure incorporates both geometric information derived from the cortical model, and neuroanatomical convention, as found in the training set. The result is a complete labeling of cortical sulci and gyri.

attachment:annot-sm.jpg

Background

[https://surfer.nmr.mgh.harvard.edu/ftp/articles/fischl04-parcellation.pdf Automatically Parcellating the Human Cerebral Cortex], Fischl et al., (2004). Cerebral Cortex, 14:11-22.
<add link to desikan paper>

Utilities

[wiki:mris_5fsample_5fparc mris_sample_parc] - samples a volumetric parcellation onto a surface
[wiki:mris_5fca_5ftrain mris_ca_train] - creates the reference atlas
[wiki:mris_5fca_5flabel mris_ca_label] - parcellates a cortical surface based on the reference atlas

Atlas

discuss default atlas, discuss creation of own atlas

FAQ

What if I have a labeled volume? How can I use it to create a labeled surface?

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	* [wiki:Self:mris_5fsample_5fparc mris_sample_parc] - samples a volumetric parcellation onto a surface