Published images by DHL and MJA

Published images by David Laidlaw and Matthew Avalos and others

``Mouse Spinal Cord Diffusion Tensor Visualization using Concepts from Painting,'' David Laidlaw, David Kremers, Eric T. Ahrens, and Matthew J. Avalos, Siggraph Technical Slide Set, 1998.
Compare this to a healthy mouse spine These two images were created by first teasing out tensor-valued voxels from an MRI spectrometer. Then, using a painting analogy, the 6 tensor degrees of freedom (a 3x3 tensor is used to describe diffusion in 3D) are "mapped" onto various brush attributes like orientation, thickness, color, transparency, texture etc. The mapping and the image composition was accomplished using AVS (Advanced Visual Systems) programming/user environment.
``Visualization of 2D Velocity, Vorticity, and Deformation Rate Tensor,'' David Laidlaw, Matthew J. Avalos and David Kremers, Siggraph Technical Slide Set, 1998.
This also was generated with AVS. But this time we've acquired 2D fluid flow data over an airfoil, and used the following map.

velocity --> black arrow size/orientation

vorticity --> color (sign) and texture (amplitude) of ellipses

deformation rate tensor --> shape and orientation of ellipses

``Volume Rendered Locust,'' David Laidlaw, Matthew J. Avalos, Siggraph Technical Slide Set, 1996.
Semi-transparent volume-rendering of MRI data collected from a locust.
``Bee MRI Data,'' David Laidlaw, Matthew J. Avalos, Russell E. Jacobs, Kurt W. Fleischer, and Alan H. Barr, Siggraph Technical Slide Set, 1994.
``Inside a Bee,'' David Laidlaw, Matthew J. Avalos, Russell E. Jacobs, Kurt W. Fleischer, and Alan H. Barr, Siggraph Technical Slide Set, 1994.
``Inside the Human Hand 2,'' David Laidlaw, Matthew J. Avalos, Russell E. Jacobs, Kurt W. Fleischer, and Alan H. Barr, Siggraph Technical Slide Set, 1994.
``Human Hand Montage,'' David Laidlaw, Matthew J. Avalos, Russell E. Jacobs, Kurt W. Fleischer, and Alan H. Barr, Siggraph Technical Slide Set, 1994.
``Lobster MRI Data,'' David Laidlaw, Matthew J. Avalos, Russell E. Jacobs, Kurt W. Fleischer, and Alan H. Barr, Siggraph Technical Slide Set, 1994.
``Human Hand,'' David Laidlaw, Matthew J. Avalos, David B. Kirk, John Snyder, Adam R. Woodbury and Alan H. Barr, Siggraph Technical Slide Set, 1992.
``Volume Rendered Jade Plant,'' David Laidlaw, Matthew J. Avalos, David B. Kirk, John Snyder, Adam R. Woodbury and Alan H. Barr, Siggraph Technical Slide Set, 1992.
``Computationally Stained Brain Slice,'' David Laidlaw, Matthew J. Avalos, David B. Kirk, John Snyder, Adam R. Woodbury and Alan H. Barr, Siggraph Technical Slide Set, 1992.
``Computationally Stained Brain Slice 2,'' David Laidlaw, Matthew J. Avalos, David B. Kirk, John Snyder, Adam R. Woodbury and Alan H. Barr, Siggraph Technical Slide Set, 1992.