SCIRun Forward/Inverse ECG Toolkit - Scientific Computing and ...

y Peacs in the Netherlands. 1 .
An equivalent dipole layer is approximated as the source in the activation based forward
problem.
3.2 Module Descriptions for Boundary Element Solutions
The boundary element solution utilizes many common modules within the SCIRun framework
to read in files, visualize data, and manipulate geometry. Descriptions of these modules
can be found in the SCIRun documentation, whereas the modules that are relatively unique
to the boundary element solution are outlined below.
The first module to be introduced is SetFieldProperties. This module is thought to
generate and modify properties of an input field, such as the potentials and conductivities
of the epicardial surface. Figure 3.2 shows an example of how epicardial and torso surfaces
should be defined. Since the heart surface is associated with epicardial potentials, it must
have conductivity set to 0. On the other hand, the torso and the lungs are measurement
surfaces and should have their respective conductivity value.
With the SetFieldProperties GUI, the user can define a set of desired properties of the
input field and the corresponding values.
Figure 3.1. Module to set properties such as conductivity and if it is a source or boundary
surface for the boundary element method.
1 To obtain this free software, visit http://www.ecgsim.org/. Any references to ECGSIM herein are
referring to version 1.3 beta
16 Chapter 3