adhd200preproc > time courses data with 1000 ROIs
Dec 1, 2011  08:12 PM | Bias
time courses data with 1000 ROIs
Hello,
I have used time courses data with 1000 ROIs.  I heard that the data were already high-pass filtered with the cut-off frequency 0.01Hz.  However, when I draw a power spectrum, I still see very high power spectrum below 0.01Hz. 

Previously Chengwei pointed out the same problem on time course data with a smaller ROIs.
I was wondering if the reason is also 3Dfourier function. Or am I doing something wrong?
 
I do not have much knowledge about preprocessing. So I am also wondering if this problem can simply be solved by refiltering.  
 
Thanks!

Threaded View

TitleAuthorDate
time courses data with 1000 ROIs
Bias Dec 1, 2011
Pierre Bellec Dec 4, 2011
Bias Dec 5, 2011
Pierre Bellec May 23, 2012