Development of realistic head models for electromagnetic source imaging of the human brain

Author

Akahn, Z. ; Acar, C.E. ; Gençer, N.G.

Author_Institution

Dept. of Electr. & Electron. Eng., Middle East Tech. Univ., Ankara, Turkey

Volume

1

fYear

2001

fDate

2001

Firstpage

899

Abstract

In this work, a methodology is developed to solve the forward problem of electromagnetic source imaging using realistic head models. For this purpose, first segmentation of the 3 dimensional MR head images is performed. Then triangular, quadratic meshes are formed for the interfaces of the tissues. Thus, realistic meshes, representing scalp, skull, CSF, brain and eye tissues, are formed. At least 2000 nodes for the scalp and 5000 for the cortex are needed to obtain reasonable geometrical approximation. Solution of the forward problem using our previous Boundary Element Method (BEM) formulation with quadratic elements remains to be made.

Keywords

biomedical MRI; boundary-elements methods; brain models; electroencephalography; image segmentation; magnetoencephalography; medical image processing; mesh generation; 3 dimensional MR head images segmentation; CSF; cortex; electromagnetic source imaging; eye tissues; forward problem; human brain; medical diagnostic imaging; quadratic elements; realistic head models development; reasonable geometrical approximation; scalp; skull; tissue interfaces; triangular quadratic meshes; Boundary element methods; Brain modeling; Conductors; Humans; Image segmentation; Magnetic heads; Mesh generation; Scalp; Shape; Skull;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE

ISSN

1094-687X

Print_ISBN

0-7803-7211-5

Type

conf

DOI

10.1109/IEMBS.2001.1019088

Filename

1019088