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An open-source software suite for processing human brain MRI


FreeSurfer is a software package for the analysis and visualization of neuroimaging data from cross-sectional and longitudinal studies. It is developed by the Laboratory for Computational Neuroimaging at the Martinos Center for Biomedical Imaging.

FreeSurfer provides full processing streams for structural and functional MRI and includes tools for linear and nonlinear registration, cortical and subcortical segmentation, cortical surface reconstruction, statistical analysis of group morphometry, diffusion MRI, PET analysis, and much more. It is also the structural MRI analysis software of choice for the Human Connectome Project.

For expansive documentation on using and understanding FreeSurfer tools, please visit the FS Wiki.


Please review the contribution guidelines and visit our build guide for step-by-step instructions on configuring and building the source code.


If you've encountered an issue or have a question about using FreeSurfer, follow these steps to get help:

  1. Search the archives: It is highly likely that someone else has run into the same problem before you. The fastest way to get answers is to search the archives of our mailing list.

  2. Ask a question: Subscribe to the mailing list and start a discussion!

If you've found a bug in the software, feel free to open an issue or submit a patch after reviewing our documentation.


Terms and conditions for use, reproduction, distribution and contribution are found in LICENSE.txt.