• 대한디지털의료영상학회논문지
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• 제5권1호
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• pp.46-63
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• 2002

This thesis describes the effective interfacing methods of PACS Modality based on the system installation and operating experiences. PACS(Picture Archiving and Communication Systems) is a system for medical image archiving and communication using large storage device and high-speed network. The standard communication protocol of PACS is DICOM(Digital Imaging and Communication in Medicine) based on TCP/IP and point-to-point protocol. However, there are many Non-DICOM Modalities and DICOM Modalities having problems. First, we had interfaced almost modalities, Fuji CR, GE CT, MRI, Angio, Fluoro, Phillips Angio, Shimadzu Fluoro, Ultrasound PACS, with the main PACS in the Seoul S Hospital as large scale hospital. And we manipulated the intelligent image distribution and the CT, MRI Interfaces never experienced before in the Anyang J Hospital and the Chungju C Hospital as mid or small scale hospital. Technically, we developed both the DICOM Interface and the Non-DICOM Interface. At the last, the DICOM Worklist and the DICOM Print Interface were implemented in the Seoul B Hospital, the Bucheon SJ Hospital and the Seoul K Hospital independently with PACS. The Oracle, Sybase and MS-SQL are used as database, and UNIX, Macintosh, MS Windows as operating systems. And the Visual C++ and UNIX C are the main programming tools. We have used UTP, coaxial and fiber optic Gable under 10/100 mbps LAN for networking.

• 대한디지털의료영상학회논문지
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• 제6권1호
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• pp.51-64
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• 2003

This thesis describes the effective interfacing methods of PACS Modality based on the system installation andoperating experiences. PACS(Picture Archiving and Communication Systems) is a system for medical image archiving and communication using large storage device and high-speed network. The standard communication protocol of PACS is DICOM(Digital Imaging and Communication in Medicine) based on TCP/IP and point-to-point protocol. However, there are many Non-DICOM Modalities and DICOM Modalities having problems. First, we had interfaced almost modalities. Fuji CR, GE CT, MRI, Angio, Fluoro, Phillips Angio, Shimadzu Fluoro. Ultrasound PACS, with the main PACS in the Seoul S Hospital as large scale hospital. And we manipulated the intelligent image distribution and the CT. MRI Interfaces never experienced beforein the Anyang J Hospital and the Chungju C Hospital as mid or small scale hospital. Technically, we developed both the DICOM Interface and the Non-DICOM Interface. At the last, the DICOM Worklist and the DICOM Print Interface were implemented in the Seoul B Hospital, the Bucheon SJ Hospital and the Seoul K Hospital independently with PACS. The Oracle, Sybase and MS-SQL are used as database, and UNIX, Macintosh, MS Windows as operating systems. And the Visual C++ and UNIX C are the main programming tools. We have used UTP, coaxial and fiber optic cable under 10/100 mbps LAN for networking.

• 대한의용생체공학회:의공학회지
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• 제9권2호
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• pp.195-210
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• 1988

We build up distributed database of medical picture and design and realize H/W & S/W of special image workstation. We build up high speed image transmission system for distributed database and retrieval of various medical pictures in w ard through image transmission system and realize integrated image diagnosis. This system improves medical service by speedy diagnosis and enables more precise diagnosis by integrated image diagnosis through distributed database. In economical view this system curtails huge cost of film processing and transmission, which make medical expense cheaf, because it does not use film. We built up PACS in pediatric hospital of Seoul National University Hopital and tested the system with various medical pictures and showed that speedy integrated image diagnosis is possible.

• 대한방사선협회지
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• 제25권1호
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• pp.18-18
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• 1999

We have studied DR of medical science at SNUH since early 90's, founded the basis of Picture Archiving Communication System(PACS) used for actual clinic parts, has acquired images gradually since January H and came to acquire images in all examinations ex

• 대한의용생체공학회:의공학회지
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• 제10권2호
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• pp.173-178
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• 1989

A vector quantization technique using a variable block size was applied to image compression of digitized X -ray films. Whether the size of VQ block should be subdivided or not is determined experimentally by the threshold value. The simulation result shows that the performance of the proposed vector quantizer is suitable for the medical image coding, which is applicable to PACS( Picture Archiving and Communication System).

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2003년도 춘계학술발표논문집 (중)
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• pp.787-790
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• 2003

통신기술과 의료장비의 발달은 환자에 대한 의료혜택의 기회를 확대하고, 최상의 의료서비스를 제공하려는 병원들에 있어서 전산 시스템은 빼놓을 수 없는 병원내 주요 기반시설로서 등장하게 되었다. 멀티미디어 기술과 정보통신의 발달은 의료분야의 정보화 및 자동화 기술 발전에 커다란 영향을 주어 의료 영상 및 각종 의료정보를 고속의 네트워킹 올 통해 전송할 수 있는 PACS(Picture Archiving and Communications System)의 개발을 가능하게 하였다. 본 논문에서는 무선네트워크의 발달과 PDA(Personal Digital Assistants)의 보편화에 따라 PDA를 이용하여 HIS(Hospital Information System)/RIS(Radiology Information System)/PACS의 자료를 검색 및 갱신할 수 있도록 설계하고, 현재 병원의 데이터베이스와 PDA의 연동이 가능하도록 병원관리 에이전트를 분석 및 설계하였다.

• Imaging Science in Dentistry
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• 제34권4호
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• pp.175-178
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• 2004

Purpose: Picture Archiving and Communication System (PACS) is difficult to implement in the best of situations, but evidence is growing that the benefits are significant. The aims of this study are to analyze the current status of full PACS and establish successful installation standard of dental PACS. Materials and Methods : Materials and methods were based on the investigation of current working status and installation standard of PACS, and observation of variable issues to installation of dental PACS. Results: By September 30,2004, full PACS implementations in their facilities were 88.1 % in specialized general hospitals (37 installations out of total 42 hospitals), 59.8% in general hospitals (144 installations out of total 241 hospitals), 12.3% in medical hospitals (116 installations out of total 941 hospitals) and 3.6% in dental hospitals (4 installations out of total 11 0 hospitals) Only 4 university dental hospitals currently have installed and are operating full PACS. Major obstacle to wide spread of dental PACS is initial high investments. Conclusions: Clinical environments of dental PACS differed from medical situation. Because of characteristic dental practice, the initial investments for dental PACS are generally much greater than those of medical PACS. Also new economic crisis makes users scruple. The best way to overcome these limitations is to establish an economic installation standard for dental PACS. Also the clear technical communication between the customer and the supplier before both sides are committed to the obstacles are critical to its success.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.1796-1800
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• 1991

Picture Archiving and Communication Systems(PACS) provide an integration of digital imaging information in a hospital, which encompasses various imaging equipment, viewing workstations, database archive systems, and a high speed fiber optic network. One of the most important requirements for integration is the standardization of communication protocols to connect devices from different vendors. Since 1985, the ACR-NEMA standard provides a hardware interface, a set of software commands, and a consistent set of data formats for point-to-point interconnection of medical equipment. However, it has been shown to be inadequate for PACS networking environments, because of its point-to-point nature and its inflexibility to allow other services and protocols in the future. Based on previous experience of PACS developments in The University of Arizona, a new communication protocol for PACS networks has been suggested to the ACR-NEMA Working Group VI. The defined PACS protocol is intended to facilitate the development of PACS's capable of interfacing with other hospital information systems. Also, it is intended to allow the creation of diagnostic information data bases which can be interrogated by a variety of distributed devices. A particularly important goal is to support communications in a multivendor environment. The new protocol specifications are defined primarily as a combination of the International Organization for Standardization / Open Systems Interconnection (ISO/OSI) protocols and the data format portion of ACR-NEMA standard. This paper addresses the specification and implementation of the proposed PACS protocol into network node. The protocol specification, which covers Presentation, Session, Transport, and Network layers, is summarized briefly. The implementation has natural extentions to Global PACS environments. The protocol implementation is discussed based on our implementation efforts in the UNIX Operating System Environment. At the same time, results of performance evaluation are presented to demonstrate the implementation of defined protocol. The testing of performance analysis is performed on the PACS prototype node.

• 대한의용생체공학회:의공학회지
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• 제19권4호
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• pp.351-360
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• 1998

아날로그 감마카메라에 비해 디지털 카메라는 Q.C가 편리하고, Calibration과 조작이 매우 쉬운 장점들을 갖고 있어 영상 질을 향상시킬 뿐만 아니라 진단의 정확도를 높일 수 있다. 더욱이, 디지털 카메라로 획득한 디지털 영상은 PACS(Picture Archiving and Communication System) 뿐만 아니라 원격진료에도 활용될 수 있다. 그러나, 많은 병원들이 아직도 아날로그 카메라를 사용하고 있고 이들을 디지털 카메라로 대체하기는 어려운 상황에 있다. 본 연구는 아날로그 감마카메라를 디지털화 할 수 있는지의 가능성을 보는 것이었다. 카메라를 디지털화 한 후 균일도 계수능력 등의 물리적 특성을 측정하였다. 임상에서의 사용 가능성을 보기 위해 아날로그 시스템과 디지털 시스템을 동시에 연결하여 임상 데이터들을 획득하였다. 이들의 결과는 임상환경에서 아날로그 카메라를 디지털화 하 수 있다는 가능성을 보여주었다.

• 한국방사선학회논문지
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• 제1권2호
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• pp.13-22
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• 2007

본 논문은 유비쿼터스 의료를 위한 의료영상의 무선전송의 개발을 목적으로 한다. 컴퓨터 시스템의 발달로 인해 의료 장비와 의료 기록 체계에 대한 많은 변화가 일어났다. 그 중 병원내의 진료 및 의무기록을 자동화하고 관리하는 HIS(Hospital Information System) 시스템과 환자에게서 촬영된 영상에 대한 관리 체계인 PACS(Picture Archiving Communication System)은 대표적인 예라할 수 있다. 이러한 자동화된 진료 시스템은 병원 내에 있지 않을 경우 이용이 곤란하며, 응급상황이나 의사 부재시에 신속한 영상 판독이 요구되는 경우 이를 즉시 수행하기는 곤란하였다. 이러한 이동에 따른 단점을 보완하기 위하여 각 의사마다 지급된 PDA를 사용하여 병원내의 영상 획득 장치로부터 생성된 환자 영상을 원격에서 CDMA 망을 사용하여 검토할 수 있는 시스템을 구현하였다. 이를 위하여 의사 및 환자의 계정 관리와 환자 영상을 영상획득 장치로부터 수신 받아 각 의사별로 할당하도록 하는 서버 시스템을 구현 하였으며, PDA를 사용하여 서버에 접속하여 환자의 영상을 검토할 수 있도록 구현하였다. 개인별로 시스템 사용에 대한 인증을 위하여 PDA에서는 데이터베이스 RDA(Remote Data Access) 방식을 사용하여 서버 데이터베이스를 엑세스하였으며, 환자 영상을 서버로부터 다운로드 하기 위하여 FTP(File Transfer Protocol)를 사용하였다. 실험 결과 한 파일의 크기가 0.37Mbyte 인 832x488*24 영상 30매를 보낸다고 가정하였을 때 약 90초 정도의 시간이 걸렸으며 이는 긴급히 또는 원격에서 영상의 수신과 검토에 문제가 없음을 나타낸다.