SUNMONTUEWEDTHUFRISAT
Events for March 21, 2019
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Ming Hsieh Institute Medical Imaging Seminar Series
Thu, Mar 21, 2019 @ 10:00 AM - 11:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Xingfeng Shao, Electrical Computer and Engineering, University of Southern California
Talk Title: Mapping Water Exchange Rate Across the Blood-Brain Barrier
Abstract: The blood-brain barrier maintains the homeostasis within the brain and the dysfunction of blood-brain barrier has been linked to multiple central nervous system diseases and psychiatric disorders. The purpose of this work is to present a novel MR pulse sequence and regularized modeling algorithm to quantify the water exchange rate, kw, across the blood-brain barrier without contrast, and to evaluate its clinical utility in a cohort of elderly subjects at risk of cerebral small vessel disease. Elderly subjects were recruited and underwent two MRIs to evaluate the reproducibility of the proposed technique. Correlation analysis was performed between kw and vascular risk factors, Clinical Dementia Rating scale, neurocognitive assessments, and white matter hyperintensities. kw was significantly higher in subjects with diabetes and hypercholesterolemia. Significant correlations between kw and vascular risk factors, Clinical Dementia Rating scale, executive/memory function, and the Fazekas scale of white matter hyperintensities were also observed. These results suggest that kw may serve as a surrogate imaging marker of cerebral small vessel disease and associated cognitive impairment.
Biography: Xingfeng Shao is a Ph.D. candidate in Dr. Danny JJ Wang's lab in USC Mark and Mary Stevens Neuroimaging and Informatics Institute (INI). He obtained his Bachelor degree in Engineering Physics at Tsinghua University in Beijing, China, and joined USC BME department as a Ph.D. student in 2016. His research focus on MRI pulse sequence development. With background in physics and neurobiology, he has developed several MRI sequences for arterial spin labeling (ASL) and proposed a novel technique to measure water permeability across the blood-brain barrier in-vivo.
Host: Professor Krishna Nayak
Location: Michelson Center for Convergent Bioscience (MCB) - 101
Audiences: Everyone Is Invited
Contact: Talyia White
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ECE Seminar: Millimeter-Wave Computational Imaging
Thu, Mar 21, 2019 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Andreas Pedross-Engel, Postdoctoral Research Associate/University of Washington, Seattle
Talk Title: Millimeter-Wave Computational Imaging
Abstract: This talk gives an overview on mmWave computational imaging. Millimeter-wave (mmWave) imaging has many applications such as remote sensing, autonomous robotics, non-destructive testing, and security screening. Some recent imaging systems will be presented, including compressed sensing and sparse reconstruction to minimize the amount of mmWave hardware, an enhanced resolution stripmap mode (ERSM) that leverages emerging metasurface antennas to improve image resolution by up to 42%, and an orthogonal coded active illumination (OCAI) approach to mitigate hardware imperfections and improve sensitivity by more than 40 dB. Finally, I will present a partitioned inverse reconstruction algorithm, optimized for GPUs, that yields a speedup of up to 300x.
Biography: Andreas Pedross-Engel is a postdoctoral Research Associate in the Department of Electrical and Computer Engineering at the University of Washington, Seattle, WA, USA. He is also a co-founder of the millimeter-wave imaging firm ThruWave Inc. He received the Dipl.-Ing. degree and the Ph.D. degree from Graz University of Technology, Graz, Austria, in 2009 and 2014, respectively. His research interests include microwave and millimeter-wave imaging systems, wireless communications, and nonlinear- and mixed- signal processing. In 2018 he received the ASciNA Young Scientist Award from the Austrian Federal Ministry of Education, Science and Research. He is also the recipient of the CoMotion Commercialization Fellows Award from the University of Washington in 2017. Since 2017 he is a Senior Member of the IEEE.
Host: Professor Urbashi Mitra, ubli@usc.edu
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
