摘要
面向服务的体系架构SOA是计算机软件领域近年来发展非常迅速的技术。随着支撑SOA的基础技术标准如Web Service和BPEL等技术及其相关产品的成熟,各行各业都出现了基于SOA的应用架构的新尝试。由于Web Service具有松散耦合、跨平台、接口标准、自描述、可基于HTTP协议访问等特点,非常适合作为异构的、分布式的信息源间信息交换平台的接口标准。而BPEL标准能够对Web Service进行灵活的编排调度,同时具有异常处理、补偿交易机制等特点,非常适合用于数据交换平台中各种交换和共享流程的定义。因此采用SOA技术和方法来实现医疗信息的交换和共享可以比较理想地解决医疗系统间异构、跨地域的难题。
本文针对现阶段众多医院影像资源的非数字化、缺乏有效集成利用的落后现状,研究采用计算机科学技术、网络技术以及图像处理技术,按照SOA的架构和方法,进行医学电子影像集成与交换平台系统的设计与实现。借助平台推动医院影像资源乃至医院信息系统的集成与资源共享,推动计算机辅助诊断技术的开展。
系统的实现主要包括两大方面：(1)面向上海市三级医疗机构,有针对性地提出影像数据在平台中交换与共享的方式。包括接入各级医疗机构的影像资源,对外提供基于安全与访问控制的影像数据访问服务,提高数据的利用率,降低病人医疗成本,提供对远程医疗系统的医学影像数据方面支持；(2)将平台与医疗机构的PACS系统以遵循国际标准(DICOM、HTTP/SOAP、XML等)的方式进行数据交换,包括未来可能覆盖医院的CT等医学影像设备产生的数据,以及HIS系统中的电子健康档案和电病历的集成与交换。
In recent years, SOA (Service Oriented Architecture) technology is developing fast in computer software field. With the SOA foundation standards like web service and BPEL and the SOA products become mature, many new attempts of SOA appear in different industry. As the web service has some features like loosely-couple, cross-platform, standard-interface, self-description and can access based on HTTP, it is very suitable to be the interface standard for the distributed and heterogeneous data sources information exchange platform. As the BPEL standard can orchestrate the web service flexibly and also has some features like exception handling, compensation transaction etc, it is very suitable to define a variety of exchange and sharing processes for the platform. Therefore, the adoption of SOA technology and methodology can be the ideal solution to solve the problem of integration of heterogeneous health care systems which are distributed in different area.
Currently, a large number of Hospitals still use the non-digital medical imaging and lack the efficient integration of these resources. In response to this situation, this thesis achieves the design and implementation of a medical images exchange platform based on the SOA architecture and technology by leveraging some technologies of the computer science, the network communication and the image processing. With this platform we try to promote the integration and sharing of medical image resources as well as the Hospital Information System and also to push the development of the computer-aided diagnosis technology.
The system's implementation includes two parts:(1) For the 3 level hierarchy of medical organization in Shanghai, we propose the way how medical images exchanged and shared in the platform. The detail approaches include the way to access medical images in different level of medical unit, the way to provide image data access service with security and access control, the way to improve the data utilization, the way to reduce health care costs of patients and the way to support the telemedicine by provide the medical image data. (2) To implement the data integration between the exchange platform and PACS systems in medical units through international standards (DICOM, HTTP/SOAP, XML etc.). In the future, we plan to cover the data generated by CT devices and electronic health records and electronic medical records from HIS.
引文
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