ras.to.talairachras: Compute MNI talairach coordinates from RAS coords.

In freesurferformats: Read and Write 'FreeSurfer' Neuroimaging File Formats

Description

Compute MNI talairach coordinates from RAS coords.

Usage

ras.to.talairachras(ras_coords, talairach, invert_transform = FALSE)

Arguments

ras_coords	nx3 numerical vector, the input surface RAS coordinates. Could be the vertex coordinates of an 'fs.surface' instance, or the RAS coords from a surface label.
talairach	the 4x4 numerical talairach matrix, or a character string which will be interpreted as the path to an xfm file containing the matrix (typically '$SUBJECTS_DIR/$subject/mri/transforms/talairach.xfm').
invert_transform	logical, whether to invert the transform. Do not use this, call link{talairachras.to.ras} instead.

Value

the Talairach RAS coordinates for the given RAS coordinates

Note

You can use this to compute the Talairach coordinate of a voxel, based on its RAS coordinate.

freesurferformats documentation built on Feb. 11, 2022, 5:06 p.m.