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13th Mediterranean Conference on Medical and Biological Engineering and Computing 2013, MEDICON 2013

作者： Garcia, J. Abella, M. de Molina, C. Liria, E. Isaila, F. Carretero, J. Desco, M. Computer Architecture and Communication Area University Carlos III Madrid Spain Bioengineering and Aerospace Engineering Dept. University Carlos III Madrid Spain Madrid Spain Madrid Spain

ISBN: (纸本)9783319008455

Most small-animal X-ray computed tomography (CT) scanners are based on cone-beam geometry with a flatpanel detector orbiting in a circular trajectory. Image reconstruction in these systems is usually performed by approximate methods based on the algorithm proposed by Feldkamp, Davis and Kress (FDK). Currently there is a strong need to speed-up the reconstruction of CT data in order to extend its clinical applications. The evolution of the semiconductor detector panels has resulted in an increase of detector elements density, which produces a higher amount of data to process. This work focuses on both standard and future high-resolution studies, in which multiple level of parallelism will be needed in the reconstruction process. In addition, this paper addresses the future challenges of processing high-resolution images in many-core and distributed architectures. © Springer International Publishing Switzerland 2014.

关键词： Parallel architectures

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Parallel implementation of a X-ray tomography reconstruction algorithm based on MPI and CUDA 13

Parallel implementation of a X-ray tomography reconstruction...

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20th European MPI Users' Group Meeting, EuroMPI 2013

作者： Blas, Javier Garcia Abella, Monica Liria, Ernesto Isaila, Florin Carretero, Jesus Desco, Manuel Computer Architecture and Communication Area University Carlos III Madrid Spain Bioengineering and Aerospace Engineering IiSGM CIBERSAM Madrid Spain

ISBN: (纸本)9788461651337

Most small-animal X-ray computed tomography (CT) scanners are based on cone-beam geometry with a flat-panel detector orbiting in a circular trajectory. Image reconstruction in these systems is usually performed by approximate methods based on the algorithm proposed by Feldkamp, Davis and Kress (FDK). Currently there is a strong need to speedup the reconstruction of X-Ray CT data in order to extend its clinical applications. The evolution of the semiconductor detector panels has resulted in an increase of detector elements density, which produces a higher amount of data to process. This work focuses on future high-resolution studies (density up to 4096 pixeles), in which multiple level of parallelism will be needed in the reconstruction. In addition, this paper addresses the future challenges of processing high-resolution images in many-core and distributed architectures. In our evaluation section we demonstrate that our solution is 17% faster than recent related works. Copyright 2013 ACM.

关键词： Parallel architectures

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BROAD-BAND ISLAND INTERCONNECTION VIA SATELLITE - PERFORMANCE ANALYSIS FOR THE RACE-II CATALYST PROJECT

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INTERNATIONAL JOURNAL OF SATELLITE communicationS 1994年第3期12卷 223-238页

作者： HADJITHEODOSIOU, MH KOMISARCZUK, P COAKLEY, F EVANS, BG SMYTHE, C Centre for Satellite Engineering Research University of Surrey Guildford GU2 5XH U.K. Obtained an M.A. in Electrical and Information Sciences from the University of Cambridge in 1989 and an M.S. in Electrical Engineering from the University of California Irvine in 1991. He is currently a Research Fellow at the Centre for Satellite Research University of Surrey U.K. His research interests include multiple access protocols for VSAT networks voice/data integration in low-bit-rate networks and the use of satellites for the provision of BISDN services. Obtained a B.Sc. in Pure and Applied Physics with Electronics in 1983 and an M.Sc. in Modern Electronics in 1984 from the University of Nottingham U.K. He was a project engineer on the Corporate Data Network for the Central Electricity Generating Board U.K. and then a senior lecturer in communication systems at the University of Greenwich UK. At present he is working on his Ph.D. at the Centre for Satellite Engineering Research (CSER) University of Surrey on the performance of communication systems. Has been Senior Lecturer in the Department of Electrical Engineering University of Surrey since 1984. She is the author (or joint author) of more than 80 research papers. Currently she teaches courses in Telecommunication Networks and Computer Architecture. Her research interests include on-board processing for satellites protocols and performance issues. Received the BSc. and Ph.D. degrees in Electrical Engineering and Microwave Systems from the University of Leeds in 1965/1968. He was British Telecom Lecturer-Reader in Telecommunications Systems at the University of Essex from 1969–1983. In 1983 he was appointed to the Alec Harley Reeves Chair of Information Systems Engineering at the University of Surrey and in 1990 became the first Director of the post-graduate centre for Satellite Engineering Research which houses some 100 researchers. In 1992 he was made a Fellow of the Royal Academy of Engineers in the U.K. and is a Fellow of IEE and a member of IEEE

The use of communication satellites as a possible way of offering broadband island interconnectivity appears to be a very attractive option, as it will enable the provision of an all-digital, transparent service to a number of ATM islands spanning a wide area, accommodating efficiently a variety of traffic demands. The CATALYST Project (RACE II/R2074) is an attempt to demonstrate the applicability and compatibility of satellite technology with the terrestrial BISDN. In this paper we present an overview of the project and focus on an initial study of the expected user performance through the CATALYST network. Our analysis is based upon mathematical and simulation models and describes the end-system to end-system transfer delay for given message lengths. The protocol profiles assume a mix of Novell NetWare and Network File System client/server architectures, which are supported by either the IEEE 802.3/Ethernet or fibre distributed data interface LANs, which are themselves linked via LAN/ATM/satellite interface units. areas of further investigation, and the implication of our analysis on the actual network architecture, are discussed.

关键词： ASYNCHRONOUS TRANSFER MODE (ATM) BROAD-BAND ISDN SATELLITE communicationS

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