Dear FSL experts:
I use "Renderhighres" to try to register thresholded z value map (64x64x35) (from FEAT) to MNI template (91x109x91).
The threshold is 2.3, so all the non-zero values in thresholded z value map (before registration) are above 2.3.
However, after finishing registration, I found that:
1) in the registered z value map(now with the size 91x109x91), the maximum z value is much smaller than unreigstered z value map (e.g. before reigstration 8.6 vs. after registration 4.5)
2) the registred z value map contains negative values (e.g. -1.26).
My questions are:
1) How could I find a new threshold which corresponds to 2.3 in the unregistred map
2) How could I deal with those negative values if I want to render the registered z map based on z value?
Thanks.
Jingqi
|