Brain
Electrical Tomography Viewer (BET Viewer)
It is a system designed for evaluating the
Brain Electrical Tomography with possibilities and
tools oriented to extract a full understanding of
this new functional tomography.
What is Brain Electrical Tomography ?
Brain electrical tomography is obtained trough integration
between functional information provided by EEG and
anatomical information given by structural tomographies
like MRI. Brain electrical tomography makes possible
spatial localization in the brain of the sources of
different physiological processes, opening in this
way new paths for studying patologies like epilepsy
as well as other brain activation processes provoked
by cognitive processing.
For obtaining brain electrical tomography the so called
EEG inverse problem must be solved. This is the problem
of estimating the localization of the generators of
the electric activity of the brain starting from the
measurements of the voltages in the scalp. Applying
modern calculation techniques it is possible to determine
the distributions of cortical currents that generate
the recorded activity at the scalp. The solution to
this problem is represented by functional images in
BET Viewer.
BET Viewer is a 32 bits full Windows compliant application
with all the advantages provided by the Windows user
interface. At the same time has a open architecture
allowing to be configured according to different user
needs depending on the image characteristics: segmentation
masks, grids, etc.
In order to facilitate visual interpretation, visualization
in 2D can be carried out in three different ways:
orthogonal planes, all slices of a given plane and
the maximum intensity projection. There are also 6
different fusion modes for representing the merging
of the electrical information with the anatomical
one. It is also possible to scale the tomographic
solution with 7 different methods as well as the brightness/contrast
balance in the anatomical image. Different color palettes
are available and the user can edit and create them.
A zoom-in/out is available too as well as a command
for movie generation in standard AVI Windows format.
BET Viewer allows you to enter to the 3D world enabling
brain visualization from any angle and depth. In order
to carry out this task, several commands are included
for setting rotation angles, lighting conditions,
visibility, box cuts, etc. The electrode positions
used in the EEG recording can be also plotted in 3D.
Spatial movies can be generated also and it is possible
to create specific user’s movies besides the
predefined ones given by the system.
Other
features
- Tomography values and coordinates reporting
in two different coordinate systems (BET Viewer own
- - coordinate system) and Talairach (if
image aligned in that space)
- Optional superposition of anatomic atlas over slices
- Printing to the highest possible resolution including
print previews.
- Contextual help system
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