Re: [caret-users] Fishy brainfish sampling

2006-10-30 Thread Donna Dierker
Graham, 1. You're right: BrainFish isn't mapping negative activity as intended. I just mapped CARET_TUTORIAL_SEPT06/BURTON_04_VibroTactile_EARLY_BLIND+orig.HEAD onto PALS_B12 711-2C using BrainFish, and although this volume has big regions of negative activity, the metric file gets assigne

Re: [caret-users] Fishy brainfish sampling

2006-10-30 Thread John Harwell
The MCW BrainFish algorithm was developed by a group at the Medical College of Wisconsin to meet a specific need they had. Unless they tell me it is not working correctly, I am not going to dig into it. I believe the enclosing voxel algorithm is the most popular, you might consider it.

[caret-users] Fishy brainfish sampling

2006-10-27 Thread Graham Wideman
Folks: The brainfish algorithm is described here: http://brainmap.wustl.edu/caret/html4.6/ map_fmri_to_surface/map_fmri_to_surface_dialog.html ... as picking up negative voxels if there are no positive ones around. Couple of issues: 1. We don't seem to be able to get negative voxels to appea