buildTemplate: ANTs template building.

In stnava/ANTsR: ANTs in R: Quantification Tools for Biomedical Images

ANTs template building.

Description

Iteratively estimate a population shape and intensity average image. This can be computationally intensive and currently is not parallelized. Perhaps better to use official antsMultivariateTemplateConstruction* in ANTs. However, this code can be useful for smaller problems/populations.

Usage

buildTemplate(
  initialTemplate,
  imgList,
  typeofTransform,
  iterations = 3,
  gradientStep = 0.25,
  blendingWeight = 0.5,
  segList,
  weights,
  verbose = TRUE,
  ...
)

Arguments

initialTemplate	fixed image to which we register the population.
imgList	moving image list from which template will be built.
typeofTransform	A linear or non-linear registration type. Mutual information metric by default. See antsRegistration.
iterations	should be greater than 1 less than 10.
gradientStep	speed of template shape update step, less than 1.
blendingWeight	parameter between zero and one, default 0.5; higher values lead to sharper intensity but may also cause artifacts.
segList	segmentations for each target image, this will trigger a joint label fusion call for each iteration and use masks during registration.
weights	numeric vector, length of number of images providing weights
verbose	print diagnostic messages, passed to antsRegistration
...	Additional options to pass to antsRegistration

Value

template antsImage

Author(s)

Avants BB

Examples

pop <- getANTsRData("population")
avg <- antsAverageImages(pop) # this is in ANTsR
template <- buildTemplate(avg, pop, "SyN", iterations = 1)

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