Positioning System Optimisation

The goal is to develop methodology and software for computational electromagnetics simulation (CEM) of wave propagation in the human body, to develop methodology and software for CEM-based optimal design, and to apply the result to the design of an antenna system for accurate positioning of cancer tumours to support efficient radiation therapy.

The project is done in close co-operation with Micropos Medical that develop a patent pending automatic system for high precision four-dimensional radiotherapy, 4DRT. The system includes an active positioning marker for each patient based on a tailored system of antenna, receivers, and signal analysis, see Figure.

The software that will be used in this project is the hybrid time-domain solver developed within the General Electromagnetic Solvers (GEMS) project. This solver combines a finite-element time-domain (FETD) solver on unstructured grids with a finite-difference time-domain (FDTD) solver on a Cartesian grid. The choice of solver is motivated by the fact that the human body is strongly heterogeneous and very large computational grids of millions of degrees of freedom are expected. The hybrid solver takes advantage of the strength of the finite element method to handle problems with varying material parameters and the efficiency of the FDTD method to enable the solution of very large problems. A novel feature that will be added to the solver is a coupling with a circuit simulator (SPICE).

 

Published: Wed 30 Jan 2013. Modified: Wed 29 Mar 2017