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Proceedings Paper

The design of a CORBA-based PACS in three-tier architecture
Author(s): Zhuo Li; Lingda Wu; Yingmei Wei; Hongwei Xie
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Paper Abstract

In the past the most of the traditional PACS adopt two-tier Client/Server architecture based on DICOM network in china. However, with the developments of PACS that becomes more large-scale and distributed, the traditional PACS architecture has a lot of weaknesses. To overcome these shortcomings, this paper presents a CORBA-based PACS in three-tier architecture which consists of the application-tier, the middle-tier and the DICOM data-tier. In application-tier, the upper applications can use the service offered from the middle-tier through the application interface. In middle-tier, the characteristic service of PACS, which are extracted from the traditional PACS, are wrapped in service components plug in the ORB software bus. For the data exchange in CORBA-based implementation, the middleware uses IIOP to call service components through the ORB then to return the results to the application-tier. The CORBA object services are responsible for the object location, creation, implementation and destruction, etc. In DICOM data-tier, DICOM image modalities and DICOM databases provide DICOM data for the middle-tier through DICOM image access service. Furthermore, a design of DICOM image access service, which accesses DICOM data and shields the middle-tier from the complexities of DICOM data structure and DIMSE protocol, is presented in this paper. After referred to the CIAS (Clinical Image Access Service) specification defined by OMG, a simplified IDL interface of DICOM image access service is also described. The CORBA-based PACS architecture is an open architecture allowing for the scalability and the interconnectivity & interoperability.

Paper Details

Date Published: 15 April 2005
PDF: 12 pages
Proc. SPIE 5748, Medical Imaging 2005: PACS and Imaging Informatics, (15 April 2005); doi: 10.1117/12.593992
Show Author Affiliations
Zhuo Li, National Univ. of Defense Technology (China)
Lingda Wu, National Univ. of Defense Technology (China)
Yingmei Wei, National Univ. of Defense Technology (China)
Hongwei Xie, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 5748:
Medical Imaging 2005: PACS and Imaging Informatics
Osman M. Ratib; Steven C. Horii, Editor(s)

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