Dear FSL group,
In line with previous papers we have applied a bandpass filter to our RS fMRI data with high-pass filtering (Gaussian-weighted least squares straight line fitting) at sigma=100.0 seconds, and low-pass filtering (Gaussian filter with half width at half maximum) at sigma=2.8 seconds.
We would like to convert these sigma values to hertz, and we are wondering what formula we should use. Our TR = 2.2
Any assistance would be more than welcome.
Kind regards,
Mauricio
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