localGyrificationIndex: Local gyrification index.
In stnava/ANTsR: ANTs in R: Quantification Tools for Biomedical Images

localGyrificationIndex

R Documentation

Local gyrification index.

Description

Estimate the gyrification index at a specific scale. This will produce images of local sulcification and gyrification as as well as the difference of these two measurements. The most gyral values are near 1 and most sulcal negative 1. The function is not limited to brain data and should work on any 3D shape. See the paper entitled the shape operator for differential image analysis.

Usage

localGyrificationIndex(segmentation, sigma = 3, k = 25, ksigma = 3)

Arguments

`segmentation`	- potentially from antsCorticalThickness
`sigma`	- scale parameter
`k`	- size of neighborhood
`ksigma`	- sigma for k-neighborhood

Value

lGI image

Author(s)

Avants BB

Examples

## Not run: 
seg <- antsImageRead("segmentation.nii.gz")
wm <- thresholdImage(seg, 3, 3) %>% morphology("dilate", 1)
lgi <- localGyrificationIndex(wm)

## End(Not run)

stnava/ANTsR documentation built on April 16, 2024, 12:17 a.m.