Image processor

Functionality

Image Processing Toolkit

• Basic image processing functions include thresholding, inversion, region growing, masking.
• Convolution filters include median, difference of Gaussians, Kirsch, Prewitt, Sobel, Marr-Hildreth.
• Segmentation functions include region growing, edge detection, outlining, erosion, dilation, and assimilation. Stop markers may be set manually.
• Histograms may be obtained for entire images or selected portions (regions of interest).
• Wizards are available for common tasks, including segmentation and mesh generation (see below), to automate parameter selection and sequencing for complex procedures. A scripting language is available for program automation of repeated tasks.

Surface representation/Mesh Generation

• Automatic mesh generation using a "shrink-wrapping" algorithm tiles a selected surface (e.g. the cortex) with a polygonal mesh. 3D rendering is available with VISUALIZER.
• Cortical inflation may be obtained from the cortex mesh with cortex curvature information explicitly retained for visualization.
• Boundary element model calculations may be performed on the surface mesh representations using SOURCE ESTIMATOR.
• Mesh Generation Wizard lets you construct a tiled surface or volume from any region creted by MR Viewer. You may then view this wireframe in the Visualizer module.
• Mesh Reduction allows you to retain the topology of the wireframe while lowering the mesh order (tile size).

Segmentation

• The Segmentation Wizard is a new feature that automates tissue classification within an MR volume. Some features are described below.

• Brain Extraction Tool (BET) is an automated algorithm for finding the brain within a a volumetric dataset.

• Hidden Markov random field algorithm automates cortical tissue classification into disjoint regions (e.g., CSF, gray matter, white matter). 

• Inner/Outer Skull and Scalp Wizards complete the picture, enabling you to generate a complete finite element model for the MR volume.

Input/Output

• User Interface.  A conventional Microsoft Windows style graphical user interface is used throughout.  Dynamic linking of graphical display windows permits selections in one window to update others automatically.

Inter-module Communication

• Input.  Requires MR Viewer.
• Output.  Source Estimator may be used for source estimation. Visualizer may be used for topographic mapping on realistic head surface.

File I/O

• Input/Output. Requires MR Viewer.

Other I/O

• Graphics may be transferred to clipboard for use by other graphics programs or for insertion into word processors.

Documentation

• Printed.  User manual, including file formats.
• On-line.  User manual and tutorial available as context sensitive hypertext.

Copyright © Source Signal Imaging, Inc.

Copyright © 2007

Cortech Solutions

Updated: 01-Nov-2008