KEYWORDS: Picture Archiving and Communication System, Computing systems, System integration, Medical imaging, Computed tomography, Magnetic resonance imaging, Human-machine interfaces, Computer aided diagnosis and therapy, Computer architecture, Bone
Radiological images, more specifically CT and MRI, are prevailing throughout most clinical practice and
being important tools for better understanding of normal and abnormal cross-sectional anatomy. Since
PACS has been introduced and implemented in 2000, a lot of radiological images are filed for the medical
education. Easy and convenient on-line accessibility of PACS integrated with RIS or HIS makes those
medical images more flexible to follow up during daily practice and to be materialized for building
educational files. One of the most advantage of this interactive education file system is its versatility simply
because of this system is integrated with PACS. We will present our interactive radiological education file
system integrated with PACS. The contents of this exhibition will contain; 1) the concept of our education
file system, 2) the methods of follow-up cases and building-up files, 3) the diversity of educational
materials integrated with PACS, 4) the user interface in reviewing files interactively, 5) future perspectives
of interactive radiological education file system in conjunction with a variety of other medical education
system or computer aided diagnosis and 6) the design of system architecture.
KEYWORDS: Picture Archiving and Communication System, Radiology, Diagnostics, System integration, Software development, Clinical trials, Electronics, Windows NT, Sun, Internet
As increasing number of medical facilities are introducing PACS, the needs to interconnect PAC systems are also increased. Although the primary goal of PACS is to enable distribution of radiologic images electronically within hospital and thus assist patient care more efficiently, inter-networking of multiple facility PAC systems can create additional application area and bring about clinical impact. By inter-networking multiple facility PACS, exams can be automatically routed to the remote radiologist when the local radiologist is not available such as during the off- duty hours and vacations. Physicians and radiologists can also benefit from the inter-networking of PACS by making telesconsultation of special cases with remote subspecialty radiologists which can lead to improved diagnostic accuracy and confidence. In this study, we attempted to develop an inter-networking system among the multi-facility PAC systems which can be used for image data transfer and telesconsultation by establishing the ISDN intranet and developing a Web based DICOM white board.
We developed a PC-based clinical workstation and implemented at Asan Medical Center in Seoul, Korea, Hardwares used were Pentium-II, 8M video memory, 64-128 MB RAM, 19 inch color monitor, and 10/100Mbps network adaptor. One of the unique features of this workstation is management tool for folders reside both in PACS short-term storage unit and local hard disk. Users can copy the entire study or part of the study to local hard disk, removable storages, or CD recorder. Even the images in private folders in PACS short-term storage can be copied to local storage devices. All images are saved as DICOM 3.0 file format with 2:1 lossless compression. We compared the prices of copy films and storage medias considering the possible savings of expensive PACS short- term storage and network traffic. Price savings of copy film is most remarkable in MR exam. Price savings arising from minimal use of short-term unit was 50,000 dollars. It as hard to calculate the price savings arising from the network usage. Off-line PC viewer is a cost-effective way of handling private folder management under the PACS environment.
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