This poster was presented as a technical demonstration in exhibitors booth #1650, 1652 & 1749 at the Society For Neuroscience 28th Annual Meeting held at Miami Beach, Florida, October 23-28, 1999. It was 1 of 8 exhibits on neuroinformatics to demonstrate live demos and results of "Human Brain Project Applications". This exhibitor's booth was sponsored by the NIH sponsored Human Brain Project.

For additional information on the Human Brain Project, go to the NIH Neuroinformatics Home Page.

Exhibit and demonstration schedule of "Human Brain Project Applications".

INTERACTIVE VISUALIZATION TOOLS FOR SPATIAL ANALYSIS OF FUNCTIONAL DATA 1Monica K. Hurdal, 2,3Kelly Rehm, 4Ken Stephenson, 2Kirt Schaper, 1Philip L. Bowers, 1De Witt L. Sumners, 2,3David A. Rottenberg 1Department of Mathematics, Florida State University, Tallahassee, FL, U.S.A. 2PET Imaging Center, VA Medical Center, Minneapolis, MN, U.S.A. 3Department of Radiology, University of Minnesota, Minneapolis, MN, U.S.A. 4Department of Mathematics, University of Tennessee, Knoxville, TN, U.S.A. 1,2,3,4Members of the International Neuroimaging Consortium

Introduction cortical flat maps serve as a visualization tool that enhance informational content of functional and anatomical neuroimages by revealing spatial relationships not previously apparent flat maps facilitate comparisons between individuals and groups of subjects We demonstrate software that can be used to create cortical flat maps. These maps exhibit conformal behaviour in that angular distortion is controlled.

CirclePack Quasi-Conformal Euclidean and Spherical Maps (right) of the Cerebellum (above) can be created using CirclePack.

Hyperbolic Maps: Areas of map distortion can be altered by interactively changing the location of the map focus.

Advantages of Our Approach mapping is quasi-conformal (angular distortion is controlled) maps can be displayed in the Euclidean plane, hyperbolic planes, and on a sphere origin and distortion of flat maps in the hyperbolic plane can be interactively transformed in real time easy to impose a coordinate system and compare different maps conformal mappings are canonical and hence mathematically unique

For more information... see our reprint: "Quasi-Conformally Flat Mapping the Human Cerebellum" in Lecture Notes in Computer Science, Springer-Verlag, Berlin, vol. 1679, pp. 279-286,1999. contact: Dr. Monica K. Hurdal, Department of Mathematics, Florida State University, Tallahassee, FL., U.S.A., 32306-4510. Phone: (+1-850) 644-7378; Email: mhurdal@math.fsu.edu; WWW: http://www.math.fsu.edu/~mhurdal or visit the International Neuroimaging Consortium page ( http://pet.med.va.gov:8080/incweb/). This work has been supported in part by NIH grants MH57180 and NS33718.

Cerebellar Isolation Beginning with a stripped brain: rotate the volume to make the line through the posterior commissure and the obex be vertical sever the brainstem at the first slice above the cerebellum beginning at the anterior surface of the brainstem, remove all exposed* white matter in a plane parallel to the PC-obex line and perpendicular to the inter-hemispheric plane continue removing exposed white matter in the peduncles until reaching the lingula. * air would touch exposed surfaces in a real-world object

Corner Cube

For more information... contact: Dr. Kelly Rehm, PET Imaging Center, VA Medical Center, University of Minnesota, Minneapolis, MN., U.S.A., 55417. Phone: (+1-612) 725-2230; Email: kelly@pet.med.va.gov; or visit the International Neuroimaging Consortium page: http://pet.med.va.gov:8080/incweb/ This work has been supported in part by NIH grants MH57180 and NS33718.