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Real‐time 3D image registration for functional MRI
Author(s) -
Cox Robert W.,
Jesmanowicz Andrzej
Publication year - 1999
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/(sici)1522-2594(199912)42:6<1014::aid-mrm4>3.0.co;2-f
Subject(s) - artificial intelligence , computer science , rotation (mathematics) , computer vision , linearization , real time mri , image (mathematics) , gradient descent , image registration , pattern recognition (psychology) , magnetic resonance imaging , physics , medicine , artificial neural network , nonlinear system , radiology , quantum mechanics
Subject head movements are one of the main practical difficulties with brain functional MRI. A fast, accurate method for rotating and shifting a three‐dimensional (3D) image using a shear factorization of the rotation matrix is described. Combined with gradient descent (repeated linearization) on a least squares objective function, 3D image realignment for small movements can be computed as rapidly as whole brain images can be acquired on current scanners. Magn Reson Med 42:1014–1018, 1999. © 1999 Wiley‐Liss, Inc.