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N4ITK: Improved N3 Bias Correction
TLDR
A variant of the popular nonparametric nonuniform intensity normalization (N3) algorithm is proposed for bias field correction with the substitution of a recently developed fast and robust B-spline approximation routine and a modified hierarchical optimization scheme for improved bias field Correction over the original N3 algorithm.
Spatial transformations of diffusion tensor magnetic resonance images
TLDR
One method, the preservation of principal direction algorithm, which takes into account shearing, stretching and rigid rotation, is shown to be the most effective and improve the consistency between registered and target images over naive warping algorithms.
An Open Source Multivariate Framework for n-Tissue Segmentation with Evaluation on Public Data
TLDR
This work describes the technical and implementation aspects of Atropos, an ITK-based multivariate n-class open source segmentation algorithm distributed with ANTs and evaluates its performance on two different ground-truth datasets.
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