Title :
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
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;
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
DOI :
10.1109/BIYOMUT.2009.5130295
