Estimating signal phases for GLM

There are couple of toolboxes written to aid with noise modelling, e.g.:

  1. PhLEM (https://sites.google.com/site/phlemtoolbox/)

  2. PNM (http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/PNM)

Check also:

  1. A guide from Geoff Aguirre
    (https://cfn.upenn.edu/aguirre/wiki/public:pulse-oximetry_during_fmri_scanning)

  2. Chris Rorden's Neuropsychology Lab website
    (http://www.mccauslandcenter.sc.edu/CRNL/tools/part)

In the analysis below I have used PhleM since it's written in MATLAB.