Seed Growing for a 4D Array {dcemri}R Documentation

Seed Growing for a 4D Array

Description

Seed growing algorithm to find voxels in a three-dimensional array according to their correlation to a seed voxel. The correlation is measured according to the fourth dimension of the array.

Usage

extract.aif(img, x, y, z, thresh = 0.9)

Arguments

img is the four-dimensional array of medical imaging data.
x,y,z are the coordinates of the seed voxel.
thresh is the minimum correlation for inclusion in the region.

Details

Correlation coefficients are computed for every voxel in the input array. A recursive algorithm is then used to grow the region of interest (ROI) from the seed voxel in three dimensions. All adjacent voxels, where the correlation exceeds the threshold, are included.

Value

coord
conc
mask
cor

Author(s)

Volker Schmid


[Package dcemri version 0.10.5 Index]