The Registration of MR Images using Multiscale Robust Methods (1996)
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BibTeX
@MISC{Alexander96theregistration,
author = {M.E. Alexander and R.L. Somorjai},
title = {The Registration of MR Images using Multiscale Robust Methods},
year = {1996}
}
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Abstract
Acquisition of MR images involves their registration against some pre-chosen reference image. Motion artifacts and misregistration can seriously flaw their interpretation and analysis. This paper provides a global registration method that is robust in the presence of noise and local distortions between pairs of images. It uses a two-stage approach, comprising an optional Fourier phase-matching method to carry out pre-registration, followed by an iterative procedure. The iterative stage uses a prescribed set of registration points, defined on the reference image, at which a robust nonlinear regression is computed from the squared residuals at these points. The method can readily accommodate general linear, or even nonlinear, registration transformations on the images. The algorithm was tested by recovering the registration transformation parameters when a 256 by 256 pixel T 2 *-weighted human brain image was scaled, rotated and translated by prescribed amounts, and to which different am...
