We have developed a Matlab "Toolbox" to recosntruct two-dimensional
EIT (Electrical Impedance Tomography) images. The package includes a forward
solver that is based on the finite element method, a simple mesh generator and
an iterative regularized solver to reconstruct 2D EIT images.
The Matlab package, which you can download
for free,
is a part of the
EIDORS (Electrical Impedance and Diffuse Optical Reconstruction Software)
project. If you have difficulties with the gzipped data files, download them
unzipped as meshdata.mat and
meshdata2nd.mat.
There was a small bug (detected 5.10. 00) in the m-files FemMatrix.m and FemMatrixNode.m.
The line bind=Element(ii).Face{In,1}; should be bind=Element(ii).Face{Jn,1}; If you have used the
meshdata.mat or meshdat2nd.mat files this bug does dot affect your results. However, with
some other meshes it may have an effect in the forward step. Also in the m-file
RemoveJacob.m the line J([1 2 L-2],:)=[]; should be
J([1 2 L],:)=[]; and in Current.m the line (in the 'opp' case)
II2=diag(ones(L,1),-8); should be II2=diag(ones(L,1),-L/2);
In m-file Current.m the rms value has no meaning for current that is used in the
computations when 'adj', 'ref' or 'opp' options are used. Multiply T with the true
rms value after computing it.