DocumentCode :
2521406
Title :
A FINITE ELEMENT METHOD FOR ELASTIC PARAMETERIZATION AND ALIGNMENT OF CORTICAL SURFACES USING SULCAL CONSTRAINTS
Author :
Joshi, Anand A. ; Shattuck, David W. ; Thompson, Paul M. ; Leahy, Richard M.
Author_Institution :
Signal & Image Process. Inst., Southern California Univ., Los Angeles, CA
fYear :
2007
fDate :
12-15 April 2007
Firstpage :
640
Lastpage :
643
Abstract :
We present a cortical surface registration method that simultaneously aligns sulcal landmarks and parameterizes two cortical surfaces. The approach is based on coregistration of cortical surface coordinate systems so that the labeled sulcal features share the same coordinates on both cortical surfaces. We model the cortex as an elastic sheet and solve the associated Cauchy-Navier equilibrium equation subject to sulcal alignment constraints. The elastic energy is computed directly with respect to the intrinsic surface geometry and discretized using a finite element method on triangular tessellations of the two surfaces. In contrast to alternative methods for cortical alignment, the method avoids the need for an intermediate flat space for sulcal landmark matching and provides a fast, accurate and inverse-consistent surface registration and parameterization for inter-subject neuroanatomical studies
Keywords :
biomechanics; biomedical MRI; brain; elasticity; finite element analysis; image matching; image registration; medical image processing; Cauchy-Navier equilibrium equation; cortical surface alignment; cortical surface coordinate systems; cortical surface coregistration; cortical surface registration; elastic energy; elastic parameterization; elastic sheet; finite element method; intersubject neuroanatomical studies; inverse-consistent surface registration; magnetic resonance imaging; sulcal alignment constraints; sulcal constraints; sulcal feature labelling; sulcal landmark matching; triangular tessellations; Brain modeling; Computational efficiency; Cost function; Equations; Finite element methods; Image processing; Laboratories; Neuroimaging; Signal processing; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Imaging: From Nano to Macro, 2007. ISBI 2007. 4th IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
1-4244-0672-2
Electronic_ISBN :
1-4244-0672-2
Type :
conf
DOI :
10.1109/ISBI.2007.356933
Filename :
4193367
Link To Document :
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