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Real-time organ motion tracking and fast image registration system for MRI-guided surgery

Systems and computers in Japan 2006年第1期37卷 83-92页

作者： Tokuda, Junichi Hirano, Masaya Tsukamoto, Tetsuji Dohi, Takeyoshi Hata, Nobuhiko Graduate School of Information Science and Technology University of Tokyo Tokyo 113-8656 Japan GE Yokogawa Medical Systems Ltd. Hino 191-8503 Japan International Society for Computer-Aided Surgery Japan Society for Computer-Aided Surgery Japan Society for Magnetic Resonance in Medicine GE Yokogawa Medical Systems Ltd. Imaging Application Tech. Center MR Group R and D Laboratory Technology Center GE Yokogawa Medical Systems Ltd. Society for Magnetic Resonance in Medicine Graduate School of Information Science and Technology Society for Life Support Technology Japan Society for Organ Preservation Biology and Medicine Society for Precision Engineering Society for Medical Image Computing and Computer Assisted Intervention International Union for Physics and Engineering Sciences in Medicine JSMEBE Japan Society for Life Assistance Technology Brigham and Women's Hospital Harvard Medical School MR Therapy Program

The advantage of magnetic resonance imaging (MRI)-guided surgery, in which MR images taken during surgery are used to guide the surgery, has been recognized recently. However, there is a problem, due to long imaging time of MRI, that it is difficult to capture the respiratory organ motion. It is often a constraint that the patient must hold his or her breath, especially in the treatment of the abdominal region. Consequently, this paper proposes a method of eliminating this constraint in MRI-guided surgery by real-time monitoring of the movement of the organ involved in the surgery by means of the signal derived from MRI. Specifically, the navigator echo is extracted in imaging during surgery. The movement of the organ involved in surgery is detected on the basis of the change in the calculated projection profile, and the results are presented to the surgeon. In this study, the procedure is built into a 1.5-T clinical MRI system. The feasibility of the proposed system was examined under clinical conditions by evaluating its accuracy and delay in a phantom experiment, and also in an in vivo experiment on the liver of a volunteer. The results are reported in this paper. © 2005 Wiley Periodicals, Inc.

关键词： Motion estimation

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Usability research challenges for cyberinfrastructure and tools

Usability research challenges for cyberinfrastructure and to...

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Conference on Human Factors in computing Systems, CHI EA 2006

作者： Procter, Rob Borgman, Christine Bowker, Geof Jirotka, Marina Olson, Gary Pancake, Cherri Rodden, Tom Schraefel, M.C. National Centre for E-Social Science Manchester University Manchester M13 9PL United Kingdom Dept. of Information Studies University of California Los Angeles CA 90095-1520 United States Center for Science Technology and Society Santa Clara University Santa Clara CA 95053-0470 United States Computing Laboratory Oxford University Oxford OX1 3QD United Kingdom Dept of Psychology University of Michigan Ann Arbor MI 48109-1092 United States School of Electrical Engineering and Computer Science Oregon State University Corvallis OR 97331-5501 United States School of Comp. Sc. and IT University of Nottingham Nottingham NG8 1BB United Kingdom School of Electronics and Comp Sci. University of Southampton Southampton SO17 1BJ United Kingdom

We summarize the motivation and aims for this workshop on usability research challenges for cyberinfrastructure and tools, and outline workshop preparations and program.

ISBN: (纸本)1595932984

We summarize the motivation and aims for this workshop on usability research challenges for cyberinfrastructure and tools, and outline workshop preparations and program.

关键词： Collaboration Cyberinfrastructure Cybertools E-science Grid Usability Virtual organizations

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Virtual Storage Image Implementation in a SAN System to Improve Storage Capacity, Fault Tolerance and Bandwidth

Virtual Storage Image Implementation in a SAN System to Impr...

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Intermag 2006 (INTERMAG 2006), vol.2

作者： Y. Deng F. Wang K. Zhou S. Wu Center for Grid Computing Cambridge-Cranfield High Performance Computing Facility Cranfield Bedfordshire UK Key Laboratory of Data Storage System Ministry of Education School of Computer Huazhong University of Science and Technology Wuhan China

With a SAN (Storage Area Network), large-capacity storage can be shared among multiple hosts at high speed. The potential market for SAN is enormous, but the technology won't become ubiquitous overnight. The complex administration is indicated by many researches as a key barrier to adopt SAN solutions. This paper designs and implements a virtual storage image (VSI) that aggregates storage space located on heterogeneous storage nodes (see Fig.1)in a Fibre Channel point-to-point (FC-P2P) SAN.

关键词： Image storage Storage area networks Fault tolerant systems Bandwidth File systems Space technology Aggregates Linux Fault tolerance Load management

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Improvement in TF-IDF scheme for web pages based on the contents of their hyperlinked neighboring pages

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Systems and computers in Japan 2005年第14期36卷 56-68页

作者： Sugiyama, Kazunari Hatano, Kenji Yoshikawa, Masatoshi Uemura, Shunsuke Graduate School of Information Science Nara Institute of Science and Technology Ikoma 630-0192 Japan Information Technology Center Nagoya University Nagoya 464-8601 Japan Information Processing Society of Japan Japanese Society for Artificial Intelligence Association for Computing Machinery American Association for Artificial Intelligence IEEE IEEE Computer Society Information Technology Center Nagoya University Graduate School of Information Science Nara Institute of Science and Technology

The TF-IDF scheme is widely used to characterize documents in an information retrieval (IR) system based on the vector space model. However, for documents having a hyperlink structure such as Web pages, the Web page contents can be characterized more accurately by using the contents of hyperlinked neighboring pages. Therefore, in this paper, we propose several techniques for using the contents of hyperlinked neighboring pages to improve the TF-IDF scheme for Web pages and then verity the effectiveness of our techniques. © 2005 Wiley Periodicals, Inc.

关键词： World Wide Web

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Building Real-Time Network Intrusion Detection System Based on Parallel Time-Series Mining Techniques

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Journal of Southwest Jiaotong University(English Edition) 2005年第1期13卷 11-17页

作者：赵峰李庆华 School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 ChinaNational High Performance Computing Center(WuHan) Wuhan 430074 China

A new real-time model based on parallel time-series mining is proposed to improve the accuracy and efficiency of the network intrusion detection systems. In this model, multidimensional dataset is constructed to describe network events, and sliding window updating algorithm is used to maintain network stream. Moreover, parallel frequent patterns and frequent episodes mining algorithms are applied to implement parallel time-series mining engineer which can intelligently generate rules to distinguish intrusions from normal activities. Analysis and study on the basis of DAWNING 3000 indicate that this parallel time-series mining-based model provides a more accurate and efficient way to building real-time NIDS.

关键词： Intrusion detection Time-series mining Sliding window Parallel algorithm

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Building Real-Time Network Intrusion Detection System Based on Parallel Time-Series Mining Technique

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Railway Engineering science 2005年第1期000卷 11-17页

作者：邓旦李树森廖明松秦建平梁燕 School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China National High Performance Computing Center(WuHan) Wuhan 430074 China

关键词： Intrusion detection Time-series mining Sliding window Parallel algorithm

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Emulator implementation of service scenario description framework for home networked appliances

Emulator implementation of service scenario description fram...

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Joint International Conference on Autonomics and Autonomous Systems/International Conference on Networking and Services (ICAS/ICNS)

作者： Yamazaki, T Kwon, D Sawada, A Minoh, M Distributed and Cooperative Media Group National Institute of Information and Communications Technology Japan School of Electrical Engineering and Computer Science Seoul National University South Korea Academic Center for Computing and Media Studies Kyoto University Japan

ISBN: (纸本)0769527256

A home network service middleware called "UKARl-Kernel" has been proposed for distributed and collaborative networked appliances and networked sensors. A home network service can be established by the middleware using distributed function elements on the networked appliances. The middleware uses a service scenario description framework on the basis of BPEL, an XML language to define business processes, to set up the service according to the present situation. In this paper, we describe the overview and of the home network service middleware and its service scenario description. Then implementation of an emulator for the set-vice scenario description framework is reported. It is noted that the proposed description framework can be constructed easily by using the existing toolkits.

关键词： Middleware

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A block-level security based on hierarchical logical volume of fibre channel RAID

A block-level security based on hierarchical logical volume ...

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International Conference on Embedded Software and Systems

作者： Ke Zhou Dan Feng F. Wang Zhan Shi Computer School Huazhong University of Science and Technology China Computer school Huazhong University of Science and Technology China Center for Grid Computing Cambridge-Cranfield High Performance Computing Facility UK

Block-level security provides the lowest level security for storage devices. In this paper, we propose a block-level security based on hierarchical logical volume of FC RAID. Using the hierarchical logical volume, a group of physical disks can be mapped to a uniform logical storage space and two encrypt/decrypt algorithms can be applied to different logic volumes.

关键词： Secure storage Information security Grid computing High performance computing computer security Logic devices Linux Optical fiber devices Educational institutions Cryptography

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Application modeling and the wireless transceiver deploying scheme of MANET

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2005年第7期33卷 1153-1157页

作者： Zhao, Yun-Long Zuo, De-Cheng Shi, Rui Yang, Xiao-Zong School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China Research Center of High Dependability Computing Technology Harbin Engineering University Harbin 150001 China

Mobile ad hoc networks are applied in a wider fields and its applying is becoming more and more complex. So, different application scenarios have different deployments of MANET in order to get the more optimal performance. Network connectivity and energy saving are the key factors to consider. In order to construct the mobile ad hoc networks more reasonably and efficiently, this paper defines a type of application model of MANET, and gives three kinds of MANET application scenarios according to such model, and proposes a MANET deploying method, especially researches the wireless transceiver deploying scheme.

关键词： Mobile radio systems

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Modeling and evaluation of a reconfiguration framework in WDM optical networks 1

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7th International Workshop on Distributed computing, IWDC 2005

作者： Tak, Sungwoo Lee, Donggeon Prathombutr, Passakon Park, E.K. Department of Computer Science and Engineering Pusan National University 30 Jangjeon-dong Geumjeong-gu Busan 609-735 Korea Republic of National Electronics and Computer Technology Center Thailand School of Computing and Engineering University of Missouri Kansas City United States

ISBN: (数字)9783540324287

ISBN: (纸本)3540309594

This paper studies a series of reconfiguration processes corresponding to a series of traffic demand changes in a WDM (Wavelength Division Multiplexing) optical network. The proposed reconfiguration framework consists of two objective functions, a reconfiguration process, and a reconfiguration policy. The two objective functions are AHT (objective function of minimizing Average Hop distance of Traffic) and NLC (objective function of minimizing Number of Lightpath routing Changes). The reconfiguration process finds a set of non-dominated solutions using the PEAP (Pareto Evolutionary Algorithm adapting the Penalty method) that optimizes two objective functions by using the concept of Pareto optimality. The reconfiguration policy picks a solution from the set of non-dominated solutions using the MDA (Markov Decision Action). Experimental results show that our reconfiguration framework incorporating the PEAP and the MDA yields efficient performance in the entire series of reconfiguration processes. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Wavelength division multiplexing

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