#FSpw A tool to perform statistical power analyses for FreeSurfer data

Liem, F., et al., Reliability and statistical power analysis of cortical and subcortical FreeSurfer metrics in a large sample of healthy elderly, NeuroImage (2014), http://dx.doi.org/10.1016/j.neuroimage.2014.12.035

In this repository you will find

• 1. surface data of the reliability analysis.
• 2. the matlab tool to perform different kinds of statistical power analyses.

1. Reliabilty

---

The file reliabilty.zip contains ICC overlay files in fsaverage space

2. Power

---

Dependencies

• FreeSurfer's save_mgh (in FreeSurfer's matlab directory)

Input

To perform statistical power analyses a configuration file has to be created. In this file a cfg structure is provided with all the necessary information to compute power analyses. This cfg structure is then passed on to the FSpwr.m function.

For an example see FSpwr_config.m

Output

Data is written to the directory given in cfg.outputPath. Surfaces are in fsaverage space. Data is computed for 0, 10 and 20 mm smoothing.