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--- neuroelf:neuroelf_brainvoyager [2016/02/16 13:47] – lydia.gibson
+++ neuroelf:neuroelf_brainvoyager [2022/12/29 07:15] (current) – external edit 127.0.0.1
@@ Line 13: / Line 13: @@
 ===== VOIs =====
-As described above, NE only applies interpolation //after// clusters/VOIs have been defined. This is why VOIs that were created in NE look like mosaics when displayed in BrainVoyager. In addition, due to different coordinate systems NE clusters/VOIs are shifted when opened in BrainVoyager. The function //nevois_addvoxels.m// (see Dropbox\DAG\Sources\bv_umg\Lydia_fmri_microstim 20151210) takes care of both issues and allows you to display NE clusters in BrainVoyager properly. **Important:** If you want to look at a corresponding VMP, you must disable interpolation in the Volume Maps tab.
+VOIs that were created in NE look like mosaics when displayed in BrainVoyager. The function //ne voi_addvoxels.m// (see Dropbox\DAG\Sources\bv_umg\_4NeuroElf) adds the missing voxels. When input shift_vois is set to 'noshift' (default) the resulting VOIs will fully overlap with the VMP voxels they were derived from. When setting shift_vois to 'shift' the resulting VOIs will be shifted by 1 voxel in order to capture the actual VTC voxels they belong to. This may be important because NE can only extract time courses from original VTC voxels.
+Background: There is an issue with BrainVoyager VTC voxel time courses and different time course extraction methods in NE (vtc.VOITimeCourse vs. vtc.VOITimeCourseOrig).
+**Important:** If you want to look at the VOIs with a corresponding VMP, you must disable interpolation in the Volume Maps tab in BrainVoyager.