Generating surfaces for registration and warping FE meshes for the forward model in EIT of brain function.
Conference poster
Tizzard, A., Holder, D., Bayford, R. and International Federation for Medical and Biological Engineering 2005. Generating surfaces for registration and warping FE meshes for the forward model in EIT of brain function. Springer.
Type | Conference poster |
---|---|
Title | Generating surfaces for registration and warping FE meshes for the forward model in EIT of brain function. |
Authors | Tizzard, A., Holder, D., Bayford, R. and International Federation for Medical and Biological Engineering |
Abstract | The research group at University College, London has been investigating the application of Electrical Impedance Tomography (EIT) to the diagnosis of epilepsy and stroke using finite element meshes based on realistic anatomical geometric models for the forward solution. The process of generating patient-specific meshes is highly labour intensive and so it is proposed that a standard mesh be warped such that it more closely matches that of the subject. This paper presents the initial stages of this process: a bi-cubic B-Spline patch is approximated through the electrode positions and then further refined by an iterative process such that it interpolates all of them to within 0.1 mm accuracy. Electrode and landmark positions are taken from eight human and one phantom tank model. For human subjects, the positions were digitised prior to routine EIT measurement and for the tank, from a CT dataset. Surfaces were successfully fitted to all subjects to the desired accuracy after a relatively few number of iterations. The method used to parameterise the electrode positions is discussed as well as how the initial surface approximation is made. Results show the accuracy of the surface when compared to that modelled from an actual subject. |
Keywords | Application; Electrical impedance tomography; finite element meshes; geometric models; B-spline; accuracy; Human; SURFACE; surface approximation; Brain |
Research Group | Biophysics and Bioengineering group |
Series | IFMBE Proceedings |
Publisher | Springer |
Publication dates | |
2005 | |
Publication process dates | |
Deposited | 03 Nov 2009 |
Output status | Published |
Additional information | Conference held on November 20-25. 2005, Prague, Czech Republic. |
Language | English |
Book title | EMBEC 05: The 3rd European Medical and Biological Engineering Conference |
https://repository.mdx.ac.uk/item/81x1y
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