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Acoustic radiation force impulse imaging: Method comparison and two-dimensional imaging

Journal of Chemical and Pharmaceutical Research 2013年第12期5卷 327-331页

作者： Yin, Hao Guo, Dequan Liu, Dong C. Zhang, Congyao School of Computer Science Sichuan University No.24 South Section 1 1st Ring Road Chengdu China Control Engineering Chengdu University of Information Technology No.24 Block 1 Xuefu Road Chengdu China

Mechanical properties of tissue have long been exploited by the physician to diagnose disease by palpation of masses. Generally, lesions are stiffer than their surrounding tissue, which exhibit different characteristic response to acoustic radiation force excitation from the surrounding tissue. The Acoustic Radiation Force Impulse (ARFI) imaging generates images of localized displacements in tissue by using radiation force induced from long pulses with hundreds of cycles. The localized micron-scale displacements are tracked by correlation-based methods. The displacement is then used to explicitly determine the spatial distribution of the mechanical properties of the tissue. Normalized cross correlation has the best performance of time-delay estimation in ultrasonic signals. However, the acquired RF echo data are required to be up-sampled to GHz so as to give micron scale precision between lags. Consequently data processing is computationally expensive and not suitable to real-time application. In this paper, two time-domain methods (Loupas and Phase Zero) and one frequency-domain (Cross Spectrum) method are compared using both simulated echo signals and phantom signals obtained through medical ultrasound system. The 2D phantom imaging is also provided.

关键词： Tissue

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Ultrasound lateral displacement and lateral strain estimation using a two-step strategy

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Journal of Chemical and Pharmaceutical Research 2013年第12期5卷 332-337页

作者： Zhang, Congyao Guo, Dequan Yin, Hao Liu, Dong C. Zhou, Xiaoming College of Computer Science Sichuan University No.24 South Section 1 Yihuan Road Chengdu China Control Engineering Chengdu University of Information Technology No.24 Block 1 Xuefu Road Chengdu China Department of Mechanical Engineering Neijiang Vocational and Technical College No.42 Dongtong Road Neijiang China

Ultrasound elastography has been shown to be useful technique in imaging information about the tissue's elastic moduli, which plays an important role in early diagnosis of several kinds of tumors. Usually, elastograms display only axial displacement and axial strain. Lateral displacement and strain estimation is difficult because there is no phase information and the precision of data is lacking too. Most of the lateral estimation methods previously reported are based on cross-correlation function (CCF). And several kinds of interpolations of high computational cost are often used to obtain more accurate results. In this paper, a two-step method combining two-dimensional sum of squared differences (SSD) and cubic spline representation for lateral displacement and strain estimation is introduced. This method can result directly in accurate and continuous estimates with no need for interpolation. computer simulations and phantom experiments are performed to investigate the performance of proposed method in terms of bias and jitter errors and image quality.

关键词： Interpolation

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A coding-based protection scheme against eavesdropping in network

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Journal of Computational Information Systems 2013年第23期9卷 9481-9488页

作者： Zhang, Jing Liu, Liu Li, Yunji Computer Teaching and Research Section Chengdu Institute Sichuan International Studies University Chengdu 611844 China Southwest Employee Training Center of Surveying and Mapping Chengdu 610100 China School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 611731 China

The Internet becomes more and more complex with the rapid development of network. There exists various adversaries and events which threat to the network security and reliability. Eavesdropping is a common threat to network security. In this paper, we present a novel protection scheme against eavesdropping with coding because that the anti-eavesdropping capability of current schemes is low. The proposed scheme introduces a coefficient of eavesdropping difficulty (CED) and average recovery ratio (ARR) to estimate the eavesdropping difficulty of different encoding algorithms. We use security transmission rate to estimate the anti-eavesdropping capability of different schemes. Then, we propose an encoding algorithm to realize high CED and ARR. The proposed algorithm regards N original data as a coding group, and outputs N coded data. Every coded data is the XOR operation result of two or many original data. The analysis results show that the proposed encoding algorithm can achieve high CED and ARR, and the anti-eavesdropping capability of proposed scheme is promoted by K=(N-k) (1 ≤ k ≤ N-2 is eavesdropping capability) or N-2 (k = N-1) multiples compare with current schemes. Copyright © 2013 Binary Information Press.

关键词： Network coding

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High-resolution contrast enhanced multi-phase hepatic Computed Tomography data fromaporcine Radio-Frequency Ablation study

High-resolution contrast enhanced multi-phase hepatic Comput...

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IEEE International Symposium on Biomedical Imaging

作者： Bernhard Kainz Philip Voglreiter Michael Sereinigg Iris Wiederstein-Grasser Ursula Mayrhauser Sonja Köstenbauer Mika Pollari Rostislav Khlebnikov Matthias Seise Tuomas Alhonnoro Yrjö Häme Daniel Seider Ronan Flanagan Claire Bost Judith Mühl David O'Neill Tingying Peng Stephen Payne Daniel Rueckert Dieter Schmalstieg Michael Moche Marina Kolesnik Philipp Stiegler Rupert H. Portugaller Department of Computing Imperial College London UK Institute for Computer Graphics and Vision (ICG) Graz University of Technology AUT Department for Surgery Medical University Graz AUT Division of Biomedical Research and Section for Surgical Research Medical University Graz AUT Medizinische Universitat Graz Graz Steiermark AT Department of Biomedical Engineering and Computational Science Aalto University FI Schloss Birlinghoven Fraunhofer Institute for Applied Information Technology GER Department of Diagnostic and Interventional Radiology Leipzig University Hospital Leipzig GER NUMA Engineering Services Ltd. Dundalk Co. Louth IRE Department of Engineering Science Keble College Oxford UK University Clinic of Radiology Medical University Graz AUT

Data below 1 mm voxel size is getting more and more common in the clinical practice but it is still hard to obtain a consistent collection of such datasets for medical image processing research. With this paper we provide a large collection of Contrast Enhanced (CE) Computed Tomography (CT) data from porcine animal experiments and describe their acquisition procedure and peculiarities. We have acquired three CE-CT phases at the highest available scanner resolution of 57 porcine livers during induced respiratory arrest. These phases capture contrast enhanced hepatic arteries, portal venous veins and hepatic veins. Therefore, we provide scan data that allows for a highly accurate reconstruction of hepatic vessel trees. Several datasets have been acquired during Radio-Frequency Ablation (RFA) experiments. Hence, many datasets show also artificially induced hepatic lesions, which can be used for the evaluation of structure detection methods.

关键词： Lesions Computed tomography Veins Biomedical imaging Animals Liver Educational institutions

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On designing a multimedia mobile learning system with animated pedagogical agents

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ICIC Express Letters 2013年第1期7卷 159-164页

作者： Chin, Kai-Yi Chen, Yen-Lin Department of Humanities and Information Applications Aletheia University No. 32 Zhenli Str. Danshui Dist. New Taipei City 25103 Taiwan Department of Computer Science and Information Engineering National Taipei University of Technology No. 1 Section 3 Chung-hsiao East Road Taipei City 10608 Taiwan

Many studies on applying computer technologies and wireless communication have conducted to education issues. These studies provide teachers and students with more active and adaptive support. In this study, we developed a Multimedia m-Learning System with APA (MLSA) that can facilitate Animated Pedagogical Agents (APAs) using mobile devices to become a powerful new technology in school settings. The MLSA was designed and developed for helping teachers to generate multimedia instructional content and students to engage in m-learning activities through three sub-tools: multimedia content authoring editor, multimedia materials sharing website, and multimedia m-learning system. This study hopes that the MLSA can facilitate the use of multimedia resources and APA in mobile applications. Finally, this study presents suggestions and implications for our future works and system development. ©2013 ICIC International.

关键词： Learning systems

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Adaptive binding for wireless networking: Design and implementation

Adaptive binding for wireless networking: Design and impleme...

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9th International Conference on Information, Communications and Signal Processing, ICICS 2013

作者： Hsieh, Chia-Weig Chi, Kuang-Hui Jiang, Ji-Han Ho, Chian C. Institute of Electrical Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Douliu 64002 Taiwan Department of Computer Science and Information Engineering National Formosa University 64 Wen-Hua Road Huwei Yunlin County 63208 Taiwan

ISBN: (纸本)9781479904341

While more and more wireless devices are phased in, binding relationship among them may become involved as wireless devices often operate in a self-organizing fashion. Though convenient, self-organization might fall short of user's expectation of flexibility sometime, leaving the user less room for binding adjustment. As a remedy, we propose a software-hardware codesign and implementation that enable the user to adapt network operations to certain needs anytime without foreknowledge of low-level details. Binding manipulation is done straightway with simple mouse clicking and dragging on icons on our graphical user interface. This study demonstrates a practical platform over which to inspire home automation or traffic management applications. © 2013 IEEE.

关键词： Graphical user interfaces

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Highlights from the 11th ISCB Student Council Symposium 2015. Dublin, Ireland. 10 July 2015

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BMC bioinformatics 2016年第3期17 Suppl 3卷 95页

作者： Katie Wilkins Mehedi Hassan Margherita Francescatto Jakob Jespersen R. Gonzalo Parra Bart Cuypers Dan DeBlasio Alexander Junge Anupama Jigisha Farzana Rahman Griet Laenen Sander Willems Lieven Thorrez Yves Moreau Nagarajan Raju Sonia Pankaj Chothani C. Ramakrishnan Masakazu Sekijima M. Michael Gromiha Paddy J Slator Nigel J Burroughs Przemysław Szałaj Zhonghui Tang Paul Michalski Oskar Luo Xingwang Li Yijun Ruan Dariusz Plewczynski Giulia Fiscon Emanuel Weitschek Massimo Ciccozzi Paola Bertolazzi Giovanni Felici Pieter Meysman Manu Vanaerschot Maya Berg Hideo Imamura Jean-Claude Dujardin Kris Laukens Westa Domanova James R. Krycer Rima Chaudhuri Pengyi Yang Fatemeh Vafaee Daniel J. Fazakerley Sean J. Humphrey David E. James Zdenka Kuncic Plant Pathology and Plant-Microbe Biology Section School of Integrative Plant Science Cornell University Ithaca USA Graduate Field of Computational Biology Cornell University Ithaca USA School of Computing & Mathematics University of South Wales Cardiff UK Department of Genome Biology for Neurodegenerative Diseases German Center for Neurodegenerative Diseases (DZNE) within the Helmholtz Association ᅟ Germany Department of Surgery Massachusetts General Hospital The Broad Institute of MIT and Harvard Boston USA Department of Systems Biology Technical University of Denmark Kemitorvet Denmark Protein Physiology Lab Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Buenos Aires Argentina Molecular Parasitology Unit (MPU) Institute of Tropical Medicine Antwerp Belgium Advanced Database Research and Modeling (ADReM) research group University of Antwerp Antwerpen Belgium Department of Computer Science University of Arizona Tucson USA Department of Veterinary Clinical and Animal Sciences Center for non-coding RNA in Technology and Health University of Copenhagen Copenhagen Denmark University College Dublin Dublin Ireland Department of Electrical Engineering (ESAT) STADIUS Center for Dynamical Systems Signal Processing and Data Analytics KU Leuven Leuven Belgium Minds Medical IT Department Leuven Belgium Scientific Institute of Public Health (WIV-ISP) Platform of Biotechnology and Molecular Biology (PBB) Brussels Belgium Department of Development and Regeneration @ Kulak KU Leuven Kortrijk Belgium Department of Biotechnology Bhupat and Jyoti Metha School of Biosciences Indian Institute of Technology Madras Chennai India Philips Research North America Briarcliff Manor USA Global Scientific Information and Computing Center (GSIC) Tokyo Institute of Technology Tokyo Japan Systems Biology Centre University of Warwick Senate House Coventry UK Systems Biology Doctoral Training Centre University of Warwick Senate House Coventry UK Center for B

A1 Highlights from the eleventh ISCB Student Council Symposium 2015 Katie Wilkins, Mehedi Hassan, Margherita Francescatto, Jakob Jespersen, R. Gonzalo Parra, Bart Cuypers, Dan DeBlasio, Alexander Junge, Anupama Jigisha, Farzana Rahman O1 Prioritizing a drug’s targets using both gene expression and structural similarity Griet Laenen, Sander Willems, Lieven Thorrez, Yves Moreau O2 Organism specific protein-RNA recognition: A computational analysis of protein-RNA complex structures from different organisms Nagarajan Raju, Sonia Pankaj Chothani, C. Ramakrishnan, Masakazu Sekijima; M. Michael Gromiha O3 Detection of Heterogeneity in Single Particle Tracking Trajectories Paddy J Slator, Nigel J Burroughs O4 3D-NOME: 3D NucleOme Multiscale Engine for data-driven modeling of three-dimensional genome architecture Przemysław Szałaj, Zhonghui Tang, Paul Michalski, Oskar Luo, Xingwang Li, Yijun Ruan, Dariusz Plewczynski O5 A novel feature selection method to extract multiple adjacent solutions for viral genomic sequences classification Giulia Fiscon, Emanuel Weitschek, Massimo Ciccozzi, Paola Bertolazzi, Giovanni Felici O6 A Systems Biology Compendium for Leishmania donovani Bart Cuypers, Pieter Meysman, Manu Vanaerschot, Maya Berg, Hideo Imamura, Jean-Claude Dujardin, Kris Laukens O7 Unravelling signal coordination from large scale phosphorylation kinetic data Westa Domanova, James R. Krycer, Rima Chaudhuri, Pengyi Yang, Fatemeh Vafaee, Daniel J. Fazakerley, Sean J. Humphrey, David E. James, Zdenka Kuncic

关键词： Visceral Leishmaniasis Feature Selection Method Frequent Itemset Mining Leishmania Donovani Student Council

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Hypoxia on a chip - A novel approach for patch-clamp studies in a microfluidic system with full oxygen control

Hypoxia on a chip - A novel approach for patch-clamp studies...

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World Congress on Medical Physics and Biomedical engineering

作者： Alrifaiy, A. Bitaraf, N. Druzin, M. Lindahl, O. Ramser, K. Department of Computer Science Electrical and Space Engineering Luleå University of Technology SE-971 87 Luleå Sweden Department of Integrative Medical Biology Section for Physiology Umeå University SE-901 87 Umeå Sweden CMTF Centre for Biomedical Engineering and Physics Luleå University of Technology Luleå Sweden Umeå University Umeå Sweden

ISBN: (纸本)9783642293047

A new approach to perform patch-clamp experiments on living cells under controlled anoxic and normoxic conditions was developed and tested. To provide an optimal control over the oxygen content and the biochemical environment a patch-clamp recording micropipette was integrated within an oxygen tight poly-methyl methacrylate (PMMA) based microchip. The oxygen content within the microfluidic chamber surrounding patch-clamp micropipette was maintained at 0.5-1.5 % by a continuous flow of artificial extracellular solution purged with nitrogen. The nerve and glial cells acutely obtained from the male rat brain were trapped by the optical tweezers and steered towards the patch-clamp micropipette through the channels of the microchip in order to achieve a close contact between the pipette and the cellular membrane. The patch-clamp recordings revealed that optical tweezers did not affect the electrophysiological properties of the tested cells suggesting that optical trapping is a safe and non-traumatizing method to manipulate living cells in the microfluidic system. Thus, our approach of combining optical tweezers and a gas-tight microfluidic chamber may be applied in various electrophysiological investigations of single cells were optimal control of the experimental conditions and the sample in a closed environment are necessary. © 2013 Springer-Verlag.

关键词： Neurons

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EDITORIAL

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INTELLIGENT BUILDINGS INTERNATIONAL 2013年第2期5卷 67-68页

作者： Clements-Croome, Derek Computer Science Department Escuela Politecnica Superior Universidad Autonoma de Madrid C/Francisco Tomás y Valiente 28049 Madrid Spain Software Engineering Department Faculty of Automatics Computers and Electronics University of Craiova Bvd. Decebal 107 200440 Craiova Romania Applied Research Laboratory Information Science and Technology Division Pennsylvania State University 204 V Applied Science Building University Park PA 16802 United States Systems Engineering Section Faculty of Technology Policy and Management Delft University of Technology Jaffalaan 5 2628BX Delft Netherlands

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关键词： indoor environment design process Research Institutes physical factors fresh air Electromagnetic Radiation CHILLER lean Environmental issues customers Finnish Primary Schools Occupational Health Scandinavia Teachers

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Parallel optimization for sparse matrix-vector on GPU

Parallel optimization for sparse matrix-vector on GPU

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2nd International Conference on Information engineering and Applications, IEA 2012

作者： Yin, Meng Jia Xu, Xian Bin Chen, Hua He, Shui Bing Hu, Jing School of Computer Wuhan University Wuhan 430074 China School of Computer and Information Science Hubei Engineering University XiaoGan China School of Computer Science Wuhan Donghu University Wuhan China Agricultural Bank of China Software Development Center Guangzhou Sub-center Dashi Section 519 Agricultural Bank of China Science and Technology Park Yingbin Road Panyu Guangzhou Guangdong China Ministry of Education Beijing 10000 China

ISBN: (纸本)9781447148494

Graphics processing units (GPUs) have been used in the general-purpose computation field. Sparse matrix-vector multiplication (SpMV) algorithm is one of the most important scientific computing kernel algorithms. In this paper, we discuss implementing optimizing sparse matrix-vector multiplication on GPUs using CUDA programming model. We used methods and strategy which including mapping thread, merging access, reusing data, and avoiding the branch. The experimental results show that the optimizations strategy to improve SpMV performance. © 2013 Springer-Verlag.

关键词： Graphics processing unit

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