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The final publication is available at Springer via http://dx.doi.org/ 10.1007/s10877-005-0675-0This article presents a Middleware based on Grid
Technologies that addresses the problem of sharing, transferring
and processing DICOM medical images in a distributed environment
using an ontological schema to create virtual communities
and to define common targets. It defines a distributed storage
that builds-up virtual repositories integrating different individual
image repositories providing global searching, progressive transmission,
automatic encryption and pseudo-anonimisation and a
link to remote processing services. Users from a Virtual Organisation
can share the cases that are relevant for their communities
or research areas, epidemiological studies or even deeper analysis
of complex individual cases.
Software architecture has been defined for solving the problems
that has been exposed before. Briefly, the architecture comprises
five layers (from the more physical layer to the more logical layer)
based in Grid Thecnologies. The lowest level layers (Core Middleware
Layer and Server Services layer) are composed of Grid
Services that implement the global managing of resources. The
Middleware Components Layer provides a transparent view of
the Grid environment and it has been the main objective of this
work. Finally, the upest layer (the Application Layer) comprises
the applications, and a simple application has been implemented
for testing the components developed in the Components Middleware
Layer.
Other side-results of this work are the services developed in the
Middleware Components Layer for managing DICOM images,
creating virtual DICOM storages, progressive transmission, automatic
encryption and pseudo-anonimisation depending on the
ontologies. Other results, such as the Grid Services developed in
the lowest layers, are also described in this article. Finally a brief
performance analysis and several snapshots from the applications
developed are shown.
The performance analysis proves that the components developed
in this work provide image processing applications with new
possibilities for large-scale sharing, management and processing of
DICOM images. The results show that the components fulfil the
objectives proposed. The extensibility of the system is achieved
by the use of open methods and protocols, so new components
can be easily added.Blanquer Espert, I.; Hernández García, V.; Segrelles Quilis, JD. (2005). An OGSA Middleware for Managing Medical Images Using Ontologies. Journal of Clinical Monitoring and Computing. 19:295-305. doi:10.1007/s10877-005-0675-029530519“European DataGrid Project”. http://www.eu-datagrid.org.“Biomedical Informatics Research”. http://www.nbirn.net/.“ACI project MEDIGRID: medical data storage and processing on the GRID”.http://www.creatis.insa-lyon.fr/MEDIGRID/.“Information eXtraction from Images (IXI) Grid Services for Medical Imaging”. Working Notes of the Workshop on Distributed Databases and processing in Medical Image Computing (DIDAMIC'04). Pag 65.“NeuroBase: Management of Distributed and Heterogeneous Information Sources in Neuroimaging”. Working Notes of the Workshop on Distributed Databases and processing in Medical Image Computing (DIDAMIC'04). Pag 85.Digital Imaging and Communications in Medicine (DICOM) Part 10: Media Storage and File Format for Media Interchange. National Electrical Manufacturers Association, 1300 N. 17th Street, Rosslyn, Virginia 22209 USA.“Open Grid Services Architecture (OGSA)”, http://www.globus.org/ogsa.Globus alliance Home Page. “Relevant documents”, http://www.globus.orgAllen Wyke R, Watt A, “XML Schema Essentials”. Wiley Computer Pub. ISBN 0-471-412597Web security and commerce/Simson Garfinkel. - Cambridge: O'Reilly, 1997. - 483 p.; 23 cm. ISBN 1565922697“The GridFTP Protocol and Software”. http://www-fp.globus.org/datagrid/gridftp.html.JPEG2000: Image compression fundamentals, standards and practice/David S. Taubman, Michael W. Marcellin. – Boston [etc.] : Kluwer Academic, cop. 2002. - XIX, 773 p.; 24 cm. + 1 CD-Rom - (The Kluwer international series in engineering and computer science) ISBN 079237519XBradley J, Erickson MD, “Irreversible Compression of Medical Images”, Dpt. Radiology, Mayo F., Rochester, MN, Jo. of D. Imaging, DOI: 10.1007/s10278-002-0001-z, 02.Monitoring & Discovery System (MDS)” http://www-unix.globus.org/toolkit/mds/“Key management for encrypted data storage in distributed systems”. Proceedings of HeathGrid 2004
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