Hi,

I have done a FIR analysis of event-related data where my time window is 16 TR:s long, consisting of 2 pre-stimulus time frames plus 14 post-stimulus time frames. I view the results with tksurfer.

If I load the results from the h-lh.bhdr file, I have all 16 time frames (0-15) which is as it should be.

However, if I load one of the contrast stat maps (e.g., cespct-lh.bhdr) I only have 13 time frames (0-12). I should expect 14 time frames (as the two pre-stimulus time frames are not supposed to show up). I therefore have one time frame missing, and I do not know if my time scale is off by one frame or if the last frame is missing.

So, which time frame is it that the cepct-lh.bhdr is missing - the 3rd or the 16th?

Thanks,

Tommi

--- Tommi Raij, M.D., Ph.D. MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging Bldg 149, 13th St Charlestown, MA 02129 U.S.A.