This paper by Lefohn et. al. at the University of Utah demonstrates a 3D level-set PDE solver implemented entirely on an ATI Radeon 8500 GPU. It shows that in addition to the basic level-set equations, the second-order mean curvature speed term can be successfully evaluated with only 8-bit textures. The paper demonstrates the solver segmenting the cortical surface from a 256 x 256 x 175 MRI volume and compares the results to a CPU implementation. The object oriented framework with which the solver was built, “Glift,” is also discussed. (A GPU-Based, Three-Dimensional Level Set Solver with Curvature Flow. Aaron Lefohn and Ross Whitaker. University of Utah tech report UUCS-02-017, December, 2002.)