@InProceedings{OsorioIsoaMato:2010:DeCTRe,
author = "Osorio, Am{\'{\i}}lcar Remigio and Isoardi, Roberto Andr{\'e}s
and Mato, Germ{\'a}n",
affiliation = "Fundaci{\'o}n Centro Diagn{\'o}stico Nuclear, Buenos Aires,
Argentina and Fundaci{\'o}n Escuela de Medicina Nuclear, Mendoza,
Argentina and Grupo F{\'{\i}}sica Estad{\'{\i}}stica, Centro
At{\'o}mico Bariloche, Bariloche, Argentina",
title = "Deformable CT registration using Fourier basis functions in 3D",
booktitle = "Proceedings...",
year = "2010",
editor = "Bellon, Olga and Esperan{\c{c}}a, Claudio",
organization = "Conference on Graphics, Patterns and Images, 23. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "Image segmentation, Bayesian analysis, MRI.",
abstract = "Non-rigid medical image registration is an essential tool when
studying deformable regions such as thorax and abdomen. In this
paper we propose an algorithm based on Fourier transformations
with trigonometric Fourier basis functions at different orders
combined with a subdivision scheme in order to attain spatial
alignment of two corresponding Computed Tomography (CT) volumes,
with small to moderate deformations. The performance of the
algorithm was analyzed as a function of the transformation order
(n) and the number of volume subdivisions along each axis (s). The
results show that a suitable parameter choice is n=2, s=3-4. The
algorithm was validated by correcting clinical images previously
deformed with Thin-Plate Splines (TPS), and also applied to
coregister different scans of a given subject after repositioning
on the scanner bed. This method is automatic and does not require
previous segmentation or landmark selection. Average registration
errors with the optimal parameters were estimated in approximately
3 mm, and typical computing time is of the order of a few minutes
in a standard personal computer. We have found that Fourier basis
functions provide an efficient way to implement non-rigid
registration.",
conference-location = "Gramado, RS, Brazil",
conference-year = "30 Aug.-3 Sep. 2010",
doi = "10.1109/SIBGRAPI.2010.15",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2010.15",
language = "en",
ibi = "8JMKD3MGPBW34M/387RFNL",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/387RFNL",
targetfile = "70636-jul05.pdf",
urlaccessdate = "2024, May 02"
}