mni152_voxels_to_fsaverage: Map MNI152 voxels of reference file to fsaverage coords and...

In dfsp-spirit/regfusionr: Registration Fusion in R

Map MNI152 voxels of reference file to fsaverage coords and vertices.

Description

The voxel indices are specific to the reference volume and thus this function is of limited use in general, but it serves as an example on how to achieve voxel mapping.

Usage

mni152_voxels_to_fsaverage(
  voxels,
  surface = "white",
  fs_home = Sys.getenv("FS_HOME"),
  silent = TRUE
)

Arguments

voxels	integer nx3 matrix, the IJK voxel indices in the 256x256x256 cortex mask reference file, 1-based.
surface	character string, the fsaverage surface (brain mesh) to load. Must be a valid FreeSurfer surface name like 'white', 'pial', 'orig, 'inflated'.
fs_home	character string, path to the FreeSurfer installation. Alternatively, a hemilist of freesurferformats::fs.surface instances like surface = list("lh"=mysurflh, "rh"=mysurfrh). Used to find the surfaces, at <fs_home>/subjects/fsaverage/surf/<hemi>.<surface>, where hemi is 'lh' and 'rh'. Can be NULL if 'surface' is a hemilist of fs.surface instances.
silent	logical, whether to suppress output messages in case of coords outside of cortex.

Value

see mni152_coords_to_fsaverage

Note

The voxel indices used by this function are specific to the cortex mask reference volume, so it is preferable to use the function. However, the code of this function illustrates how to get the fsaverage coords based on the IJK voxel indices for your own image, so take it as a demo.

dfsp-spirit/regfusionr documentation built on Sept. 4, 2022, 9:32 a.m.