America Latina En/Em Foco

Webinar #2: 28 June, 2021 at 2:00pm EDT (UTC -4:00)

Featured Topic: Quantitative Ultrasound and Low-cost Ultrasound System

Ivan

Ivan Miguel Rosado Mendez, Ph.D.

Main Talk

Quantitative Ultrasound in Obstetrics and Neonatology

Quantitative Ultrasound (QUS) has the potential to provide noninvasive biomarkers of tissue structure and function in a practical and safe way. This talk will cover applications of two QUS methods, shear wave elasticity imaging and ultrasound backscatter spectroscopy, for the assessment of normal remodeling and damage of structurally complex tissues: the uterine cervix and the neonatal brain. In the cervix, shear wave elasticity imaging is investigated to analyze the frequency dependence of the phase velocity (dispersion) to learn about the structural basis of the cervical remodeling process during pregnancy. In the neonatal brain, ultrasound backscatter spectroscopy is being investigated as a potential tool for detecting cell death caused by different insults, such as long exposures to anesthetics. The talk will conclude with a discussion on the perspective for an extended application of these techniques. 

Miguel Bernal

Miguel Bernal

Industry Talk

More information coming soon!

Roberto Lavarello

Roberto Lavarello

Moderator

Roberto Lavarello received his B.Sc. degree in Electronics Engineering from the Pontificia Universidad Católica del Perú in 2000, and his M.Sc. and Ph.D. degrees in Electrical and Computer Engineering from the University of Illinois at Urbana-Champaign in 2005 and 2009, respectively. He is currently a full professor at the Department of Engineering of the Pontificia Universidad Católica del Perú and the director of the Medical Imaging Laboratory, the M.SC. in Biomedical Engineering, and the Ph.D. in Engineering programs from the same institution. His research is primarily focused on the reconstruction and processing of images for the non-invasive assessment of pathological conditions. He is a senior member of IEEE and a former Fulbright scholarship recipient. He served as an Associate Editor for the IEEE Transactions on Biomedical Engineering (2010-2012) and is currently an Associate Editor for the IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control and the IEEE Transactions on Medical Imaging, and an editorial board member for the IEEE Open Access Journal of Engineering in Medicine and Biology. He has served as IEEE EMBS Peru Section Chapter chair (2014-2016) and is currently the R9 representative at the IEEE EMBS AdCom (2017-2022), the chair-of the IEEE Transactions on Medical Imaging Steering Committee, the chair of the the IEEE International Symposium on Biomedical Imaging Steering Committee, the co-chair of the backscatter coefficient group of the the AIUM/QIBA Pulse-Echo Quantitative Ultrasound Biomarker committee. and a member of the IEEE EMBS Technical Committee on Biomedical Imaging and Image Processing, the IEEE SPS Technical Committee on Bio Imaging and Signal Processing, the Technical Program Committee of the IEEE International Ultrasonics Symposium, and the IEEE UFFC Diversity and Inclusion committee.

Webinar #1: 31 May, 2021 at 2:00 PM EDT (UTC-4:00)

Featured Topic: Breast Cancer Ultrasound Imaging

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Ana B. Ramirez

Main Talk

Comparing Full Waveform Inversion Methods for Ultrasound Imaging for Breast Cancer Detection

Current ultrasound imaging techniques use only part of the information enclosed in the recorded high-frequency sound waves limiting the quality of the information present in the reconstructed image. Advanced ultrasound imaging methods, known as full waveform inversion, use all available information enclosed in the recorded field – including multiple scattering, dispersion, and diffraction effects – to improve the image quality and give accurate quantitative information about the tissue parameters. Full-wave inversion (FWI) may be implemented in either the time or the frequency domain but determining which method should be used is not simple. In this webinar, we will discuss two different non-linear FWI imaging methods: time-domain inversion (TDI) and frequency-domain contrast source inversion (CSI). The methods were tested on the reconstruction of the same synthetic data; a 2-D scan from a circular transducer array enclosing a cancerous breast model. Both methods were evaluated in noise-free and noisy scenarios. Also, the reciprocity of sources and receivers was evaluated as well as the computational complexity of the methods

image (1)

Carla Silva Perez

Early-career Short Talk

Lymphedema, in Survivors of Breast Cancer

Current ultrasound imaging techniques use only part of the information enclosed in the recorded high-frequency sound waves limiting the quality of the information present in the reconstructed image. Advanced ultrasound imaging methods, known as full waveform inversion, use all available information enclosed in the recorded field – including multiple scattering, dispersion, and diffraction effects – to improve the image quality and give accurate quantitative information about the tissue parameters. Full-wave inversion (FWI) may be implemented in either the time or the frequency domain but determining which method should be used is not simple. In this webinar, we will discuss two different non-linear FWI imaging methods: time-domain inversion (TDI) and frequency-domain contrast source inversion (CSI). The methods were tested on the reconstruction of the same synthetic data; a 2-D scan from a circular transducer array enclosing a cancerous breast model. Both methods were evaluated in noise-free and noisy scenarios. Also, the reciprocity of sources and receivers was evaluated as well as the computational complexity of the methods

Chris Korte

Chris de Korte

Moderator

Chris L. de Korte is a Professor of Medical Ultrasound Techniques at Radboud University Medical Center since 2015 and a professor of medical ultrasound imaging at the University of Twente since 2016. He studied electrical engineering at the Eindhoven University of Technology. In 1999, he obtained his Ph.D. at the Biomedical Engineering Group of the Thoraxcentre, Erasmus University Rotterdam on his thesis Intravascular Ultrasound Elastography. In 2002 he joined the Clinical Physics Laboratory, Department of Pediatrics of the Radboud University Nijmegen Medical Center of which he became head in 2004. In 2006 he was registered as Medical Physicist. Since 2012, he is chair of the Medical UltraSound Imaging Centre at the Department of Medical Imaging: Radiology of Radboud University Medical Centre. His research is on functional imaging using Ultrasound with a focus on cardiovascular and oncological applications. For his research, he received multiple grants from the Dutch Technology Foundation (STW) and a VENI (2000), VIDI (2006), and VICI (2011) grant from The Netherlands Organization for Scientific Research (NWO). In 2018, a consortium under his leadership was awarded the NWO-TTW Perspectief grant (4M euros). Prof. de Korte is president of the Netherlands Society for Medical Ultrasound (NVMU) and national delegate of the European Federation of Societies for Ultrasound in Medicine and Biology (EFSUMB). He is an associate editor for IEEE Transactions on UFFC-S and the Journal of Medical Ultrasonics. He serves as an editorial board member of Ultrasound in Medicine and Biology and the Journal of the British Medical Ultrasound Society and is a member of the Technical Program Committee of the IEEE International Ultrasonics Conferences.

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