vol_to_surf: map values from a 3d volume to a surface in the same...
In bbuchsbaum/neurosurf: Data structures and IO for surface-based neuroimaging data

vol_to_surf

R Documentation

map values from a 3d volume to a surface in the same coordinate space

Description

map values from a 3d volume to a surface in the same coordinate space

Usage

vol_to_surf(
  surf_wm,
  surf_pial,
  vol,
  mask = NULL,
  fun = c("avg", "nn", "mode"),
  knn = 6,
  sigma = 8,
  dthresh = sigma * 2
)

Arguments

`surf_wm`	the white matter (inner) surface
`surf_pial`	the pial (outer) surface
`vol`	an image volume of type `NeuroVol` that is to be mapped to surface
`mask`	a mask defining the valid voxel in the image volume
`fun`	the mapping function, which can be "avg" or "nn"
`knn`	the number of nearest neighbors to consider (for "avg" mapping function)
`sigma`	the bandwidth of the smoothing kernel (for the "avg" mapping function)
`dthresh`	a valid mapping voxel only if it is less than `dthresh` units away from vertex.

Examples


#volname <- system.file("inst/testdata/Schaefer2018_200Parcels_7Networks_order_FSLMNI152_1mm.nii",
#package="neurosurf")
#vol <- neuroim2::read_vol(volname)

bbuchsbaum/neurosurf documentation built on Aug. 29, 2024, 10:53 a.m.