vol.mask.from.segmentation: Extract subset from a volume by value.

In fsbrain: Managing and Visualizing Brain Surface Data

Extract subset from a volume by value.

Description

Extract subset from a volume by value, set all other voxel values to NA. Typically used to extract a brain structure (like corpus callosum) from a volume segmentation (like the mri/aseg.mgz file of a subject). You should consider passing the volume and the include values as integers.

Usage

vol.mask.from.segmentation(volume, include_values)

Arguments

volume	numeric 3D array
include_values	numerical vector, the intensity values which qualify a voxel to be part of the result (without being set to NA)

Value

numerical array with same dimensions as the input volume. All values which are not part of include_values replaced with NA.

fsbrain documentation built on Aug. 23, 2026, 5:06 p.m.