Chuck Sites
University of Louisville
ECE Dept. W.S. Speed, Rm 200
Louisville, Ky 40292


Interests:  High Performance Computing
                 Medical Imaging
                 Visual Supercomputing
                 Virtual Reality in Medicine

Click Here for the CARDEYE2 Project.

ALL NEW: FreeVR/VTK library. FreeVR is a CAVELib like library for Virutal Reality systems like the Immersa Desk and CAVE systems. vtkFVR is a series of Vtk c++ classes for vtk rendering in the FreeVR enviroment. The software is still alpha but it is working. Below is a snap shot of vtk demo being rendered under the freeVR simulator.

Click for the vtkFVR webpage.

Report: A Fast Automatic Method for 3D Volume Segmentation of the Human Cerebrovascular

3D Volume Visualization of the Visable Human.

The 3D Volume Visualization of the Visable Human is an demonstration program for a modified version of an SGI OpenGL Volumizer VTK addon class by Sean Spicer. We have ported it to VTK 3.1 and 3.2 and added the capability to specify a Volume of interest and added one additional class method to his software. This allows us to dynamically update the VOI in the display. Additionally we are designing a method which will allow volumes to be displayed of various shapes by specifing a triangulated convex hull in table format.

The CVIP Laboratory Neuro-Endoscope Simulation

 The Neuro-Endoscope Simulation is a project I've been working on. Then endoscope is represented by the Yellow pointer in the top left panel. The Green tip is the flexor and the tip of the flexor is the lens of the endoscope. The plane that is show at an odd angle is the volume sampling plane perpendicular to the flexor tips viewing vector. The views in the bottom panel show the Sagittial, Axial and Corronal views of the MRI volume, with cross hairs indicating the position of the tip. The panel on the right shows the volume sampling plane. The middle window in that panel shows the volume rendered MRI data stack, and the last window in the panel shows the Endoscope Simulation view.

The control panel for positioning the endoscope is seen on the top far right. The systems is completely interactive. The panel on the bottom right simply shows the coordinates of the tip after applying all of the transformations. The control panel provides positioning information for the endoscope in the form of yawn, pitch, roll, X,Y,Z coordinates, the flexor angle and extension of the scope.

This work is being funded in part by Wittiker Foundation Research Grant No. 98-009

Registration and Visualization of the Neuro-Vascular

  Show in this example is a Visualization of the Veins and Arteries in the human brain, registered and segmented from MRA (Magnetic Resonance Angiogram) and MRV (Magetic Resonace Vienticulargram). Artieres are false colored Red and Veins false colored in blue. Two volume data sets one MRA and the other MRV are registered using a parallel algorithm based on the Maximization of Mutual Information (Developed by Jeremy Nett of the CVIP Laboratory). The Registration of the volumes produces resampled images which are then segmented using our Image Seeded Segmentation techniques for extracting the ateries and veins.

We add a partial Volume Rendering of the MRA stack to demonstrate the quality of the automatic Registeration. The Volume Rendering is using the special SGIVolumizer functions of VTK noted above.