Forward problem solution for contactless electrical conductivity imaging with realistic head model

Author

Zengin, Reyhan ; Gençer, Nevzat G.

Author_Institution

Elektr. ve Elektron. Muhendisligi Bolumu, Orta Dogu Teknik Univ., Ankara, Turkey

fYear

2009

fDate

20-22 May 2009

Firstpage

1

Lastpage

4

Abstract

In this study, forward problem of contactless electrical conductivity imaging is solved by using realistic-head model. Realistic-head model is modelled by a single volume with the ANSYS software and divided into hexahedral elements. Conductivity information for each element is obtained from MR gray-scale images obtained as a result of segmentation.For realistic-head model, a coil of radius 1 cm, 1 cm above the scalp and carrying a sinusoidal (50 kHz) current of 1 A is used as a source. Realistic-head model is composed of the scalp, skull, brain fluid and brain (gray matter and white matter) tissues. For each tissue magnetic flux densities and current densities have been obtained.

Keywords

bioelectric phenomena; biomedical MRI; brain; finite element analysis; image segmentation; medical image processing; neurophysiology; ANSYS software; MR gray-scale image; brain; brain fluid; contactless electrical conductivity imaging; current 1 A; frequency 50 kHz; gray matter tissue; hexahedral element conductivity information; image segmentation; radius 1 cm; realistic head model; scalp; skull; tissue current density; tissue magnetic flux density; white matter tissue; Brain modeling; Coils; Conductivity; Contacts; Gray-scale; Image segmentation; Magnetic flux density; Magnetic heads; Scalp; Skull;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering Meeting, 2009. BIYOMUT 2009. 14th National

Conference_Location

Balcova, Izmir

Print_ISBN

978-1-4244-3605-7

Electronic_ISBN

978-1-4244-3606-4

Type

conf

DOI

10.1109/BIYOMUT.2009.5130295

Filename

5130295