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Events for March 18, 2016
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Anthropomorphic Digital Reference Objects: Extensible Tools for Evaluating Quantitative Imaging Algorithms
Fri, Mar 18, 2016 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Ryan Bosca , University of Wisconsin
Talk Title: Anthropomorphic Digital Reference Objects: Extensible Tools for Evaluating Quantitative Imaging Algorithms
Series: Medical Imaging Seminar Series
Abstract: Assessing and mitigating the various sources of bias and variance associated with MR image quantification algorithms (e.g., pharmacokinetic modeling of dynamic contrast enhanced MRI) is essential to the use of such algorithms in clinical research and practice. Grid based digital reference objects (DRO) have been used traditionally to assess such algorithms. More recently, a number of publicly available, normal patient derived, digital anthropomorphic tissue models have been developed. By assigning physical parameters to these tissue models in conjunction with a physiological model, for example, the general kinetic model (GKM), a new DRO can be generated. Furthermore, by incorporating a disease state (e.g., a tumor), the DRO can be made to more realistically represent standard operating conditions for quantitative imaging algorithms. Specifically, such DROs provide a means of assessing algorithm performance across a model parameter space and facilitating investigation of any spatially dependent biases and variances. This talk will provide an overview of the methodology for generating such DROs in addition to illustrating some potential example applications.
Biography: Dr. Bosca is a research associate in Medical Physics at the University of Wisconsin in Madison. He received his master degree in physics from the University of North Texas and his PhD in medical physics from the Graduate School of Biomedical Sciences at The University of Texas Health Science Center in Houston. His research interests include quantitative MR imaging, particularly pharmacokinetic modeling, the development of realistic digital phantoms to aid in assessing and mitigating sources of bias and variance in quantitative algorithms, and the application of multi parametric quantitative MR imaging (e.g., combing quantitative imaging biomarkers from dynamic contrast enhanced, diffusion tensor, dynamic susceptibility contrast MR techniques) for assessing treatment response. In addition, he is keenly interested in the development and validation of freely available, open source, software tools for use in quantitative imaging studies.
Host: Professor Krishna Nayak
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Talyia White
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Chip-Based Stimulated Brillouin Scattering for Low-Power Microwave Photonic Signal Processing Applications
Fri, Mar 18, 2016 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Benjamin J. Eggleton, University of Sydney
Talk Title: Chip-Based Stimulated Brillouin Scattering for Low-Power Microwave Photonic Signal Processing Applications
Abstract: The last few years have seen major progress in harnessing on-chip photon-phonon interactions, leading to a wide range of demonstrations of new functionalities. Utilizing not only the optical response of a nonlinear waveguide - but also hypersound acoustic resonances - enables the realization of microwave devices with unprecedented performance. Here we overview on-chip Stimulated Brillouin scattering (SBS) with special emphasis on reconfigurable and broadband microwave signal processing schemes. We review the different material platforms and structures for on-chip SBS, ranging from chalcogenide rib waveguides to CMOS compatible hybrid silicon/silicon-nitride structures and silicon nanowires. We show that the paradigm shift in SBS research - from long length of fibers to chip scale devices - is now moving towards fully integrated photonic-phononic CMOS chips.
Biography: Professor Benjamin Eggleton is an ARC Laureate Fellow and Professor of Physics at the University of Sydney and Director of the ARC Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS). He obtained his PhD degree in Physics from the University of Sydney, in 1996 and then joined Bell Laboratories, Lucent Technologies as a Postdoctoral Member of Staff. In 2000, he was promoted to Director within the Specialty Photonics Division of Bell Laboratories, where he was engaged in forward-looking research supporting Lucent Technologies business in optical fiber devices. He returned to the University of Sydney in 2003 as the founding Director of CUDOS and Professor in the School of Physics.
Professor Eggleton is a Fellow of the Optical Society of America, IEEE Photonic and the Australian Technology, Science and Engineering Academy (ATSE).He was the recipient of the 2011 Eureka Prize for Leadership in Science, the Walter Boas Medal of the Australian Institute of Physics and the OSA's Adolph Lomb Medal. Eggleton has published about 400 journal papers which have been cited >15,000 times with an h-number of > 59 (webofscience). He was President of the Australian Optical Society, is currently Editor-in-Chief for APL Photonics and serves on the Board of Governors for IEEE Photonics.
Host: Alan Willner, x04664, willner@usc.edu
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
