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Using the Grid for enhancing the performance of a medical image search engine

Using the Grid for enhancing the performance of a medical im...

引用

21st IEEE International symposium on computer-Based Medical Systems

作者： Pitkanen, Mikko Juhani Zhou, Xin Hyvarinen, Antti E. J. Mueller, Henning Helsinki Inst Phys Technol Programme Helsinki Finland Univ Appl Sci Sierre Switzerland Aalto Univ Espoo Finland Univ & Hosp Geneva Geneva Switzerland

ISBN: (纸本)9780769531656

In this paper we show how Grid computing can be used to improve the operation of a medical image search system. The paper introduces the basic principles of a content-based image retrieval (CBIR) system and identifies the computationally challenging tasks in the system. For the computationally challenging tasks an efficient design is proposed that uses distributed Grid computing to carry out the image processing in a distributed and efficient way. The algorithms of the search system are executed by using a real medical image collection as input and a Grid computing infrastructure to provide the needed computing power. Finally, the results show how the image processing task that required tens of hours to complete can be processed by using only a fraction of the originally required computing time.

关键词： Grid computing

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Fully automatic segmentation of abdominal organs from CT images using fast marching methods

Fully automatic segmentation of abdominal organs from CT ima...

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21st IEEE International symposium on computer-Based Medical Systems

作者： Campadelli, Paola Casiraghi, Elena Pratissoli, stella Univ Milan Dipartimento Sci Informaz Milan Italy

ISBN: (纸本)9780769531656

Computed tomography (CT) images are becoming an invaluable mean for abdominal organ investigation. In the field of medical image processing, some of the current interests are the automatic diagnosis of liver, spleen, and kidney pathologies and the 3D volume rendering of the abdominal organs. The first and fundamental step in all these studies is the automatic organs segmentation, that is still an open problem. In this paper we propose a fully automatic gray level based segmentation framework that employs a fast marching technique;the proposed segmentation scheme is general, and employs only established and not critical anatomical knowledge. For this reason, it can be easily adapted to separately segment different abdominal organs, by overcoming problems due to the high inter and intra patient gray level and shape variabilities;the extracted volumes are then combined to achieve robust results. The system performance has been evaluated on the data of 40 patients, by comparing the automatically detected organ volumes to the organ boundaries manually traced by three experts. The good quality of the achieved results is proved by the fact that they are comparable to the inter and intra personal variability of the manual segmentation produced by experts.

关键词： image segmentation

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Fully Automatic Segmentation of Abdominal Organs from CT images Using Fast Marching Methods

Fully Automatic Segmentation of Abdominal Organs from CT Ima...

引用

Annual IEEE symposium on computer-Based Medical Systems

作者： Paola Campadelli Elena Casiraghi stella Pratissoli Dipartimento di Scienze dellInformazione Universita degli Studi di Milano Milan Italy

Computed tomography (CT) images are becoming an invaluable mean for abdominal organ investigation. In the field of medical image processing, some of the current interests are the automatic diagnosis of liver, spleen, and kidney pathologies and the 3D volume rendering of the abdominal organs. The first and fundamental step in all these studies is the automatic organs segmentation, that is still an open problem. In this paper we propose a fully automatic gray level based segmentation framework that employs a fast marching technique; the proposed segmentation scheme is general, and employs only established and not critical anatomical knowledge. For this reason, it can be easily adapted to separately segment different abdominal organs, by overcoming problems due to the high inter and intra patient gray level and shape variabilities; the extracted volumes are then combined to achieve robust results. The system performance has been evaluated on the data of 40 patients, by comparing the automatically detected organ volumes to the organ boundaries manually traced by three experts. The good quality of the achieved results is proved by the fact that they are comparable to the inter and intra personal variability of the manual segmentation produced by experts.

关键词： image segmentation Abdomen Computed tomography Biomedical image processing Liver Pathology Rendering (computer graphics) Shape Data mining Robustness

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Using the Grid for Enhancing the Performance of a Medical image Search Engine

Using the Grid for Enhancing the Performance of a Medical Im...

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Annual IEEE symposium on computer-Based Medical Systems

作者： Mikko Juhani Pitkanen Xin Zhou Antti E. J. Hyvarinen Henning Muller Technology Programme Helsinki Institute of Physics Finland University and Hospitals of Geneva Helsinki University of Technology University Hospitals of Geneva Switzerland University of Applied Sciences Sierre Switzerland

In this paper we show how grid computing can be used to improve the operation of a medical image search system. The paper introduces the basic principles of a content-based image retrieval (CBIR) system and identifies the computationally challenging tasks in the system. For the computationally challenging tasks an efficient design is proposed that uses distributed grid computing to carry out the image processing in a distributed and efficient way. The algorithms of the search system are executed by using a real medical image collection as input and a grid computing infrastructure to provide the needed computing power. Finally, the results show how the image processing task that required tens of hours to complete can be processed by using only a fraction of the originally required computing time.

关键词： Biomedical imaging Search engines Grid computing image databases Distributed computing image retrieval Content based retrieval Biomedical informatics Hospitals Visual databases

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Toward a Robust System to Monitor Head Motions during PET Based on Facial Landmark Detection: A New Approach

Toward a Robust System to Monitor Head Motions during PET Ba...

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Annual IEEE symposium on computer-Based Medical Systems

作者： Sergey Anishchenko Vladislav Osinov Dmitry Shaposhnikov Lubov Podlachikova Richard Comley Xiaohong W. Gao A.B.Kogan Research Institute for Neurocybernetics Southern Federal University of Russia Russia School of Computing Science Middlesex University London UK

A new approach for the detection of head motions during PET scanning is presented. The proposed system includes 4 modules, which are: input module, face segmentation, facial landmark detection, and head movement estimation. The developed system is tested on pictures monitoring a subject's head while simulating PET scanning (n=12) and face images of subjects with different skin colours (n=31). Experimental results show that the centres of chosen facial landmarks (eye corners and middle point of nose basement) can be detected with high precision (1plusmn0.64 pixels). processing of 2D images with known moving parameters demonstrates that the parameter movement in terms of rotation and translation along X, Y, and Z directions can be obtained very accurately via the developed methods.

关键词： Robustness Monitoring Positron emission tomography Face detection Motion detection Head image segmentation System testing Skin Nose

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Encompass: Managing functionality

Encompass: Managing functionality

引用

21st International Parallel and Distributed processing symposium, IPDPS 2007

作者： Goldshmidt, Oleg Rochwerger, Benny Glikson, Alex Shapira, Inbar Domany, Tamar IBM Haifa Research Laboratory University Campus Haifa 31905 Israel

ISBN: (纸本)1424409101

Today's system management tools focus on a computer as a visible enclosure of both computational resources (CPU and memory) and the functionality and data that reside in the storage subsystem. Recent technological trends, such as shared SAN or NAS storage and virtualization, have the potential to break this tight association between functionality and machines. We describe the design and implementation of ENCOMPASS - an image management system centered around a shared storage repository of "master system images", each representing different functionality. The functionality is provisioned by "cloning" master images, associating the resulting "clone images" with specified physical and/or virtual resources ("machines"), customizing the clone images for the specific environment and circumstances, and automatically performing the necessary operations to activate the clones. "Machines" - physical or virtual - are merely computational resources that do not have any permanent association with functionality. ENCOMPASS supports the complete lifecycle of a system image, including reallocation and re-targeting of resources, maintenance, updates, etc. It separates image creation from image management from resource allocation policies -an emerging trend that is manifested in particular by proliferation of turn-key "virtual appliances". © 2007 IEEE.

关键词： computer aided software engineering

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Pipelining tradeoffs of massively parallel SuperCISC hardware functions

Pipelining tradeoffs of massively parallel SuperCISC hardwar...

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21st International Parallel and Distributed processing symposium, IPDPS 2007

作者： Ihrig, Colin J. stander, Justin Jones, Alex K. University of Pittsburgh Dept. of Electrical and Computer Engineering Pittsburgh PA 15261 United States

ISBN: (纸本)1424409101

Parallel processing using multiple processors is a well-established technique to accelerate many different classes of applications. However, as the density of chips increases, another technique to accelerate these applications is the use of application specific hardware processing blocks in parallel within a chip. SuperCISC hardware blocks utilize this method to accelerate scientific, signal, and image processing applications. By applying pipelining methodologies to SuperCISC functions, the effective amount of parallelism already present can be further increased. Automated register placement within a combinational dataflow graph (DFG) is governed by the desired maximum operating frequency provided as a parameter to the tool flow, as well as the results of static timing analysis of the circuit. Results presented include the design tradeoffs between increased performance, area, and energy. Additionally, benefits of pipelining compared to hardware replication as a means of achieving further parallelism is studied. © 2007 IEEE.

关键词： Parallel processing systems

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Experiments with a software component enabling NetSolve with direct communications in a non-intrusive and incremental way

Experiments with a software component enabling NetSolve with...

引用

21st International Parallel and Distributed processing symposium, IPDPS 2007

作者： Zuo, Xin Lastovetsky, Alexey School of Computer Science and Informatics University College Dublin Belfield Dublin 4 Ireland

ISBN: (纸本)1424409101

The paper presents a software component that enables NetSolve with direct communications between servers in a non-intrusive and incremental way. Non-intrusiveness means that the software component is supplementary, working on top of the original system, which does not change at all. Increment means that the software component does not have to be installed on all computers to enable applications with the new feature. It can be done incrementally, step by step, and the new feature will be enabled in part, with the completeness dependent on how many nodes have been upgraded with the software component. The paper describes the design and implementation of the software component. The paper also reports on experiments with three typical scientific NetSolve applications having different communication structures: (i) protein tertiary structure prediction, (ii) image processing using sequential algorithms, and (iii) the matrix chain product. The presented experimental results show that the performance of these Grid applications can be easily and significantly improved by using the proposed supplementary software component. © 2007 IEEE.

关键词： computer software

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High accuracy bicubic interpolation using image local features

High accuracy bicubic interpolation using image local featur...

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21st symposium on Signal processing

作者： Yuan, Shuai Abe, Masahide Taguchi, Akira Kawamata, Masayuki Tohoku Univ Grad Sch Engn Dept Elect Engn Sendai Miyagi 9808579 Japan Musashi Inst Technol Dept Elect & Elect Engn Tokyo 1588557 Japan

In this paper, we propose a novel bicubic method for digital image interpolation. Since the conventional bicubic method does not consider image local features, the interpolated images obtained by the conventional bicubic method often have a blurring problem. In this paper, the proposed bicubic method adopts both the local asymmetry features and the local gradient features of an image in the interpolation processing. Experimental results show that the proposed method can obtain high accuracy interpolated images.

关键词： bicubic interpolation asymmetry feature gradient feature

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United-FS: A logical file system providing a single image of multiple physical file systems on NFS server

United-FS: A logical file system providing a single image of...

引用

21st International Parallel and Distributed processing symposium, IPDPS 2007

作者： Huan, Chen Yi, Zhao Jin, Xiong Jie, Ma Ninghui, Sun National Research Center for Intelligent Computing Systems Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences Beijing 100039 China

ISBN: (纸本)1424409101

NFS is considered to be the bottleneck in cluster computing environment because of its limited resources and centralized data management. With the development of hardware, NFS server has more than one I/O channel, more storage space and more powerful CPU. In this paper, we describe the design and the implementation of a new logical file system called United-FS*. It can make storage devices connected to multiple I/O channels work concurrently and cooperatively. It can be exported by NFS server to provide a single file system image to clients by hiding a variety of native file systems built on different type of storage devices. This paper also compares the United-FS with the Software RAID system both from theoretical analysis and experiments. The results show that United-FS is much more flexible and its performance is better than Software RAID in most cases. © 2007 IEEE.

关键词： File organization

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