Integration of radiology and hospital information systems (RIS, HIS) with PACS: requirements of the radiologist.

PACS development has now reached a stage where it can clearly be stated that the technology for storage, networking and display in a fully digital environment is available. This is reflected by an already large and rapidly increasing number of PACS installations in USA, Western Europe and Japan. Such installations consist of a great variety of information systems, more or less interconnected, like PACS, HIS, RIS and other departmental systems, differing in both hardware and software. Various data - even if they only concern one person - are stored in different systems distributed in the hospital. The integration of all digital systems into a functional unit is determined by the radiologist's need of quick access to all relevant information regardless where it is stored. The interconnection and functional integration of all digital systems in the hospital determine the clinical benefits of PACS. This paper (1) describes the radiologist's requirements concerning this integration, and (2) presents some realistic solutions such as the Siemens ISI (Information System Interface), and a mobile viewing station for the wards (visitBox).     

Integrating digital systems: commitment and collaboration

One year ago, the radiology department at Ball Memorial Hospital, a 350-bed facility in Muncie, IN, was completely film-based. The need to support a new all-digital, 35-room emergency department (ED) hastened the facility's transition to a digital environment. Today, with the exception of mammography, the hospital's imaging services are now digital. To develop and implement the project, the hospital formed an internal implementation team. An independent consultant was also hired to evaluate the impact of these new technologies and to provide an estimated cost payback. After research, site visits, and vendor demonstrations, the hospital selected a single vendor for its picture archiving and communication system (PACS), digital radiography (DR), computed radiography (CR), and overall project management. The DR system was installed in the ED to provide digital image capture for a full range of trauma exams. The ED also initially began utilizing a Web-based PACS distribution originally implemented for after-hours teleradiology. The majority of the hospital's imaging studies are captured with 2 multi-cassette CR systems that serve 7 exam rooms in the radiology department. The hospital also installed remote operations panels to expedite entry of patient and exam information. Technologists readily embraced both CR and DR systems. The Web distribution system now transmits images to hospital-based computers and to 150 remote referring physicians. The PACS platform automatically e-mails key images and radiology reports to referring physicians. Authorized physicians can also request reports and images on an as-needed basis. The PACS vendor had previously performed multiple integrations with the radiology information system (RIS) vendor; the integration of PACS and RIS was extremely smooth. One of the critical components of a successful conversion is experienced, dedicated management. The hospital retained professional project management services to facilitate implementation and to ensure adequate training for all users.     

The Vienna SMZO-PACS-project: the totally digital hospital.

This paper gives an overview of the SMZO-PACS-Project in the form of a rough specification of the system architecture and the functional parameters related to it. The PACS architecture, determined by the large amount of data volume produced in the SMZO Hospital is outlined. In both radiology and trauma departments high technical requirements concerning data throughout and fault tolerance are demanded. Therefore these PACS modules are designed to minimize the workload of the network so that the performance is not degraded in the case of fault of a single component. A PACS module includes image acquisition devices of a certain modality with related reporting workstations and a distributed electronic archive. The functionality of the modules is described, special interest is posed on the integration of the different information management systems PACS, RIS and HIS, to achieve a complete record of data input and throughput in the hospital.     

Financing a large-scale picture archival and communication system

RATIONALE AND OBJECTIVES: An attempt to finance a large-scale multi-hospital picture archival and communication system (PACS) solely based on cost savings from current film operations is reported. MATERIALS AND METHODS: A modified Request for Proposal described the technical requirements, PACS architecture, and performance targets. The Request for Proposal was complemented by a set of desired financial goals-the main one being the ability to use film savings to pay for the implementation and operation of the PACS. RESULTS: Financing of the enterprise-wide PACS was completed through an operating lease agreement including all PACS equipment, implementation, service, and support for an 8-year term, much like a complete outsourcing. Equipment refreshes, both hardware and software, are included. Our agreement also linked the management of the digital imaging operation (PACS) and the traditional film printing, shifting the operational risks of continued printing and costs related to implementation delays to the PACS vendor. An additional optimization step provided the elimination of the negative film budget variances in the beginning of the project when PACS costs tend to be higher than film and film-related expenses. CONCLUSION: An enterprise-wide PACS has been adopted to achieve clinical workflow improvements and cost savings. PACS financing was solely based on film savings, which included the entire digital solution (PACS) and any residual film printing. These goals were achieved with simultaneous elimination of any over-budget scenarios providing a non-negative cash flow in each year of an 8-year term.     

放射科工作流集成的应用实践

探讨综合性大型医院RIS/PACS建设中放射科工作流集成方案。采用I HE radiology工作流相关的4个集成模式,并根据国内需求优化应用,达到改善预定工作流、报告工作流、简化纠错流程、提高工作诊疗效率及质量的要求。重视I HE radiology集成模式应用,兼顾本土化需求,完善数字化医疗影像工作环境。     

通过工作列表实现数字化网络各系统之间患者信息的一致性

目的 实现图像存储与传输系统(picture archiving and communication system，PACS)、放射学信息系统(radiology information systems，RIS)、影像设备之间患者检查信息的一致性。方法 我院引进GE Signa 1．5T磁共振、数字乳腺，Agfa数字X线摄影、计算机X线摄影及GE CT等数字化医学设备。GE PACS是英文系统，所以前期医院在未解决信息一致性时只通过PACS对检查影像进行保存，通过PACS系统中简单的信息管理工作，并没有真正意义上的worklist。2个月后，我院采用国际上先进的解决方法即通过医学数字成像及通讯(digital imaging and communication in medicine，DICOM)标准的工作列表(worklist)的方法实现信息的一致性。在RIS系统中将患者中文信息转换为英文信息，保存并为worklist提供患者的英文信息。结果 我院在集成PACS和RIS的2年多时间以来，通过worklist来保证RIS与影像设备患者检查信息的一致性，取得了非常好的效果。在所有诊断工作站上，诊断医生通过中文RIS系统，对病人的信息进行编辑、修改、产生。结论 通过worklist实现PACS、RIS、影像设备之间患者检查信息的一致性是可行的。     

应用IHE集成PACS/HIS,构建数字化医院之基础——新楼医院经验介绍

新楼医院在PACS的构建和PACS与HIS/RIS的集成中遵循I HE的技术框架,应用I HE的集成模式。结果显示I HE的参照应用不仅可以评估PACS厂商的集成能力,提高院内医疗人员素质外,也可以缩短PACS构建的进程,降低构建成本,并保证未来系统的扩充性。而医疗机构高层的充分支持和对标准应用的肯定,以及相关的完整教育训练和配套措施,是提高系统成功的关键因素。本文的实践证明采用标准规范的好处及分享个案医院应用I HE的经验,并再次验证标准规范对于医院不同信息系统集成的重要性,供其他医院在构建PACS时参考。     

Enterprise-wide PACS: beyond radiology, an architecture to manage all medical images

RATIONALE AND OBJECTIVES: Picture archiving and communication systems (PACS) have the vocation to manage all medical images acquired within the hospital. To address the various situations encountered in the imaging specialties, the traditional architecture used for the radiology department has to evolve. MATERIALS AND METHODS: We present our preliminarily results toward an enterprise-wide PACS intended to support all kind of image production in medicine, from biomolecular images to whole-body pictures. Our solution is based on an existing radiologic PACS system from which images are distributed through an electronic patient record to all care facilities. This platform is enriched with a flexible integration framework supporting digital image communication in medicine (DICOM) and DICOM-XML formats. In addition, a generic workflow engine highly customizable is used to drive work processes. RESULTS: Echocardiology; hematology; ear, nose, and throat; and dermatology, including wounds, follow-up is the first implemented extensions outside of radiology. CONCLUSION: We also propose a global strategy for further developments based on three possible architectures for an enterprise-wide PACS.     

Systems integration for PACS

A successful PACS (Picture Archiving and Communications System) implementation requires an eclectic integration of a number of key technologies. Among these are equipment interfaces, communications, storage, and display. Coincident with this, the software architecture must support a distributed system of heterogeneous structures, provide for protocol and format conversions to a unified system standard, be scalable to accommodate expansion, and provide a measure of fault tolerance. In this paper we survey the current state of the UCLA PACS components and architecture.     

The digital readiness of imaging facilities in Saskatchewan.

OBJECTIVE: To determine the digital readiness of Saskatchewan's imaging facilities. METHODS: A questionnaire was mailed to all 173 imaging facilities in Saskatchewan, ranging from small private clinics to tertiary care hospitals. The 129 responses were received, tabulated and summarized. RESULTS: Of the 129 facilities that responded, only 2 had picture archiving and communication systems (PACS). Both were private, urban imaging facilities. Six facilities had digital radiology information systems, 12 had digital hospital information systems and 8 had digital patient records. Only 42 sites had Internet access in their facilities. CONCLUSION: Only a small minority of Saskatchewan imaging facilities have any digital capability whatsoever. None are prepared to make the transition to a fully digital environment at this time. The infrastructure required to send or receive high-quality digital images among imaging facilities in Saskatchewan does not exist. A strategy to address the implementation of digital imaging and PACS should be developed at a provincial level.     

Integration of PACS and HIS into the workflow of a nuclear medicine department. Experience in Regensburg

AIM: The development of new diagnostic techniques and the implementation of a modern quality control management system requires the continuous adaptation of existing data processing tools to the nuclear medicine diagnostic workflow. Furthermore, PACS connected to HIS facilitates and enhances the transfer of data and pictures, and satisfies the legal requirements for data retention as regulated by law. Therefore, the aim of this work is to present the architecture, structure and results of such a system newly installed in a department of nuclear medicine. METHODS: Initially, the nuclear medicine workflow was carefully analyzed and each step was correlated to the corresponding module. The standard SAP R/3 and IS-H/IS-H(*)med based software used for patient administration at the University of Regensburg Hospital was adapted to the needs of the Nuclear Medicine Department. The networking of the imaging systems was done by integration of a PACS. Finally, the PACS was connected to the HIS to allow the attachment of images to the medical report. RESULTS, CONCLUSION: By connecting the HIS to the nuclear medicine PACS, the workflow was significantly improved. The data management sequence starting at the reception desk, continuing through the nuclear medical examination, to the physician's final written and image report is clearly structured. Although high demands exist on technical support and administration the integration of PACS and HIS into the nuclear medicine workflow leads to enhanced efficiency and reduction in hospital costs. Patient and data management are considerably improved in this way.     

Picture Archiving and Communication System (PACS) implementation, integration & benefits in an integrated health system

The availability of the Picture Archiving and Communication System (PACS) has revolutionized the practice of radiology in the past two decades and has shown to eventually increase productivity in radiology and medicine. PACS implementation and integration may bring along numerous unexpected issues, particularly in a large-scale enterprise. To achieve a successful PACS implementation, identifying the critical success and failure factors is essential. This article provides an overview of the process of implementing and integrating PACS in a comprehensive health system comprising an academic core hospital and numerous community hospitals. Important issues are addressed, touching all stages from planning to operation and training. The impact of an enterprise-wide radiology information system and PACS at the academic medical center (four specialty hospitals), in six additional community hospitals, and in all associated outpatient clinics as well as the implications on the productivity and efficiency of the entire enterprise are presented.     

History of PACS in Asia

First, history of PACS (picture archiving and communication system for medical use) in Japan is described in two parts: in part 1, the early stage of PACS development from 1984 to 2002, and in part 2 the matured stage from 2002 to 2010. PACS in Japan has been developed and installed by local manufacturers by their own technology and demand from domestic hospitals. Part 1 mainly focuses on quantitative growth and part 2 on qualitative change. In part 2, integration of PACS into RIS (radiology information system), HIS (hospital information system), EPR (electronic patient record), teleradiology and IHE (integrating healthcare enterprise) is reported. Interaction with other elements of technology such as moving picture network system and three dimensional display is also discussed. Present situation of main 4 large size hospitals is presented. Second, history of PACS in Korea is reported. Very acute climbing up of filmless PACS diffusion was observed from 1997 to 2000. The reasons for such evolution are described and discussed. Also changes of PACS installation and system integration with other systems such as HIS and role of them in radiological diagnoses in Korea since 2002 are described. Third, history in China is investigated by checking international academic journals in English and described as far as events are logically linked and consistently meaningful.     

Systems integration: requirements for a fully functioning electronic radiology department.

Disparate computer-based information systems such as hospital information systems (HIS), radiology information systems (RIS), and picture archiving and communication systems (PACS) have been introduced into radiology departments at various times to meet specific operational objectives. Typically, these systems are implemented without an integration strategy. Systems integration, which optimizes integrity of data and labor savings, can be achieved by two general approaches. The first links the HIS to the PACS; the second involves interlinking of the HIS, RIS, and PACS, with the RIS as the central controlling system. Standardization in hardware, operating systems, and data base formats--which will allow true integration--is being addressed nationally and worldwide. Operational issues to resolve include ways to increase network capacity, control of data flow, and strategies for dealing with downtime. In the future, systems integration will enable prefetching, two-way interfaces, interfaces with digital dictation systems, and improved linkages with external digital input devices.     

The challenge of PACS in a small hospital

Memorial Hospital is located in-North Conway, New Hampshire. Year round, the 35-bed hospital serves mainly tourists and retirees to the area. The imaging department wanted to integrate its services within an existing community network, meet the needs of a transient population and resolve staff utilization and storage problems. Conversion from film to digital in the radiology department took advantage of digital x-ray and PACS. Since the hospital was already using digital technology for CT, MR, ultrasound and fluoroscopy, it made sense to include plain film imaging in the digitization process Memorial Hospital faced a number of challenges. Those in decision-making positions lacked a general knowledge about PACS, and, in particular, about PACS in similarly sized facilities. The hospital also lacked experience working with vendors. A timeline was critical as Memorial Hospital prepared for winter, its busiest season. The facility decided on a phased-in project with no immediate HIS/RIS interface, and computerized radiography with hard-copy films was implemented immediately. The facility has made the transition from a conventional imaging department to a PACS environment. It attributes its success to the way it involved those who would be affected by any future changes in the planning and decision-making processes. Memorial Hospital expects to expand its services and streamline its archival capabilities in the near future.     

Enterprise PACS and image distribution.

Around the world now, because of the need to improve operation efficiency and better cost effective healthcare, many large-scale healthcare enterprises have been formed. Each of these enterprises groups hospitals, medical centers, and clinics together as one enterprise healthcare network. The management of these enterprises recognizes the importance of using PACS and image distribution as a key technology in cost-effective healthcare delivery in the enterprise level. As a result, many large-scale enterprise level PACS/image distribution pilot studies, full design and implementation, are underway. The purpose of this paper is to provide readers an overall view of the current status of enterprise PACS and image distribution. reviews three large-scale enterprise PACS/image distribution systems in USA, Germany, and South Korean. The concept of enterprise level PACS/image distribution, its characteristics and ingredients are then discussed. Business models for enterprise level implementation available by the private medical imaging and system integration industry are highlighted. One current system under development in designing a healthcare enterprise level chest tuberculosis (TB) screening in Hong Kong is described in detail.     

PACS: the silent revolution

More than 15 years ago the idea of a Picture Archiving and Communication System (PACS) and a filmless hospital was created. In a PACS environment images are acquired, read, communicated and stored digitally. After many years of unsuccessful attempts and prototype installations, the necessary hardware components for a successful PACS installation are now readily available. However, software development is still lagging behind. Only very recently, software developers have realized that it is not sufficient for PACS software to store, communicate and display images, but that PACS software should effectively support the radiologist in the task of interpreting and communicating imaging findings through context-dependent default display arrangements, work-flow management, radiological and hospital information systems integration, and computer-assisted diagnosis. This review examines hard- and software requirements for efficient PACS operation, analyses costs and benefits, and discusses future developments. Received: 26 October 1998; Revision received: 11 January 1999; Accepted: 4 February 1999     

Medical image security in a HIPAA mandated PACS environment.

Medical image security is an important issue when digital images and their pertinent patient information are transmitted across public networks. Mandates for ensuring health data security have been issued by the federal government such as Health Insurance Portability and Accountability Act (HIPAA), where healthcare institutions are obliged to take appropriate measures to ensure that patient information is only provided to people who have a professional need. Guidelines, such as digital imaging and communication in medicine (DICOM) standards that deal with security issues, continue to be published by organizing bodies in healthcare. However, there are many differences in implementation especially for an integrated system like picture archiving and communication system (PACS), and the infrastructure to deploy these security standards is often lacking. Over the past 6 years, members in the Image Processing and Informatics Laboratory, Childrens Hospital, Los Angeles/University of Southern California, have actively researched image security issues related to PACS and teleradiology. The paper summarizes our previous work and presents an approach to further research on the digital envelope (DE) concept that provides image integrity and security assurance in addition to conventional network security protection. The DE, including the digital signature (DS) of the image as well as encrypted patient information from the DICOM image header, can be embedded in the background area of the image as an invisible permanent watermark. The paper outlines the systematic development, evaluation and deployment of the DE method in a PACS environment. We have also proposed a dedicated PACS security server that will act as an image authority to check and certify the image origin and integrity upon request by a user, and meanwhile act also as a secure DICOM gateway to the outside connections and a PACS operation monitor for HIPAA supporting information.     

Utilizing data grid architecture for the backup and recovery of clinical image data.

Grid Computing represents the latest and most exciting technology to evolve from the familiar realm of parallel, peer-to-peer and client-server models. However, there has been limited investigation into the impact of this emerging technology in medical imaging and informatics. In particular, PACS technology, an established clinical image repository system, while having matured significantly during the past ten years, still remains weak in the area of clinical image data backup. Current solutions are expensive or time consuming and the technology is far from foolproof. Many large-scale PACS archive systems still encounter downtime for hours or days, which has the critical effect of crippling daily clinical operations. In this paper, a review of current backup solutions will be presented along with a brief introduction to grid technology. Finally, research and development utilizing the grid architecture for the recovery of clinical image data, in particular, PACS image data, will be presented. The focus of this paper is centered on applying a grid computing architecture to a DICOM environment since DICOM has become the standard for clinical image data and PACS utilizes this standard. A federation of PACS can be created allowing a failed PACS archive to recover its image data from others in the federation in a seamless fashion. The design reflects the five-layer architecture of grid computing: Fabric, Resource, Connectivity, Collective, and Application Layers. The testbed Data Grid is composed of one research laboratory and two clinical sites. The Globus 3.0 Toolkit (Co-developed by the Argonne National Laboratory and Information Sciences Institute, USC) for developing the core and user level middleware is utilized to achieve grid connectivity. The successful implementation and evaluation of utilizing data grid architecture for clinical PACS data backup and recovery will provide an understanding of the methodology for using Data Grid in clinical image data backup for PACS, as well as establishment of benchmarks for performance from future grid technology improvements. In addition, the testbed can serve as a road map for expanded research into large enterprise and federation level data grids to guarantee CA (Continuous Availability, 99.999% up time) in a variety of medical data archiving, retrieval, and distribution scenarios.