Events Calendar

“Geometric Methods for Brain Image Registration and Signal Analysis”

Speaker: Dr. Anand A. Joshi, Postdoctoral Associate, Signal and Image Processing Institute, USC

Talk Title: “Geometric Methods for Brain Image Registration and Signal Analysis”

Abstract: My talk will focus on applications of techniques from Riemannian geometry to signal and image processing, with the emphasis on human brain imaging. Studies of anatomical changes in the brain over time or of differences between populations are often performed to understand changes in disease and development. Such studies require that the imaging data first be registered to a common coordinate system. Registration and analysis of neuroimaging data presents a challenging problem due to the complex folding patterns in the human brain. Specifically, the anatomical and functional brain data is often modeled as a highly convoluted 2D curved image. Since it is non-flat, the non-Euclidean geometry of this data needs to be accounted for performing registration and subsequent signal processing. Techniques from differential geometry offer a powerful set of tools to deal with the convoluted nature of the cortex. I will present a method based on p-harmonic mapping when performing cortical surface parameterization as well as surface and volumetric registration techniques for inter-subject alignment of brains. Furthermore, I will present techniques for filtering, pattern classification and spectral analysis that use the heat kernel and the eigenspectrum of the Laplace-Beltrami operator that forms a basis for analysis on the cortical surface. I will conclude the talk with a description of recent work on the use of brain imaging data to elucidate structural and functional connectivity in the human brain.

Biography: Bio: Dr. Anand Joshi received his B.E. degree in Electronics from Shivaji University and MTech in electrical engineering from Indian Institute of Technology, Kanpur. He also worked for Siemens and later for Sasken. Dr. Joshi received his Ph.D degree in electrical engineering from USC in 2008 followed by postdoctoral training in the Laboratory of Neuro Imaging at UCLA. Dr. Joshi's research interests lie in the area of brain imaging, geometric methods and brain connectivity.

Host: Dr. Alexander A. Sawchuk

More Information: Seminar-Joshi_110111.pdf

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248

Audiences: Everyone Is Invited

Contact: Mayumi Thrasher