• Korean Journal of Digital Imaging in Medicine
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• v.6 no.1
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• pp.9-18
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• 2003

디지털 영상 검출기와 디스플레이 기술의 발달과 의료영상전달시스템(PACS)의 출현은 전통적 필름방식에 비하여 디지털 방식으로 방사선과 영상을 획득하고 전송, 저장하는 매우 효과적인 수단을 제공하고 있다. 2002년 8월, 연세의료원 세브란스병원은 진단 영상 판독 목적으로 18 대의 CRT(Braco View, Belgium)와 32대의 평판 LCD(Totoku Electric Co., Ltd., Japan) 디스플레이 장치를 GE full-PACS(GE 메디칼시스템코리아 : GEMSK)와 연계하여 설치 완료하였다. 본 연구에서, 기하학적 왜곡, 반사, 휘도 반응, 휘도 균일도, 분해능, 노이즈,베일링 글레어, 칼라 균일도 항목들을 AAPM TG18 보고서 9.0에 따라서 시각적 그리고 부분적으로는 정량적인 방법으로 인수검사를 실시하여 보고한다. 사용된 장비는 색도계로도 사용되는 간편한 휘도계, TG18 테스트 패던, AAPM Tg18 AT plug-in software(Barco View Ltd., Kortrijk, Belgium)이었다. 칼라 균일도를 제외한 모든 테스트 결과는 AAPM TG18에서 권고하는 기준에 일치하였으며 진단 영상 판독에 사용하기에 전적으로 수락할 수 있는 성능이었다. 결론으로, 사용된 인수검사는 단지 인수 검사 표준을 제공하는 것 뿐만 아니라 품질검사(QC)의 지침, 판독 환경의 최적화 그리고 교체 시기나 업그레이드 시기를 결정하여주는 중요한 역할을 할 수 있을 것이다.

• Journal of Korea Society of Industrial Information Systems
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• v.14 no.3
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• pp.30-36
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• 2009

With the rapid progress of medical image information system, a variety of researches for the system that can read and decipher the medical images in anytime and anywhere have been studied. In this paper, we develop personal digital assistant (PDA) device based mobile digital imaging and communications in medicine (DICOM) image viewer that can process the received medical images at any time. In particular, with the aid of the proposed mobile DICOM image viewer, we can read several images simultaneously and we can read the selected image only from the several images. To cope with the small size of PDA screen, the function of image enlargement is also included in the proposed mobile DICOM image viewer.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.1
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• pp.142-148
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• 2003

We compress medical images in order to solve problems both of request of storage mediums and of a low network speed. In this paper, integration compression environment has been developed for unity of various compression methods. Various compression methods that are implemented by integration compression environment, RLC, Lossless JPEG, and JPEG, comply with the DICOM 3.0. A compression method using DWT is implemented at it. And a unit method of Lossless compression method and lossy compression method is designed to improve images quality and to progress compression ratio. Diverse medical images can be compressed by each compression method. And integration compression environment is operated together database so that information of medical images is administered.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2004.11a
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• pp.53-55
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• 2004

In emergency cases, such as the severe trauma involving the fracture of skull, spine, or cervical bone, from auto accident or a fall, and/or pneumothorax which can not be diagnosed exactly by the eye examination, it is necessary the radiological examination during transferring to the hospital for emergency care. The aim of this study was to design and evaluate the prototype of mobile medical image communication system based on CDMA 1X EVDO. The system consists of a laptop computer used as a transmit DICOM client, linked with cellular phone which support to the CDMA 1X EVDO communication service, and a receiving DICOM server installed in the hospital. The DR images were stored with DICOM format in the storage of transmit client. Those images were compressed into JPEG2000 format and transmitted from transmit client to the receiving server. All of those images were progressively transmitted to the receiving server and displayed on the server monitor. To evaluate the image quality, PSNR of compressed image was measured. Also, several field tests had been performed using commercial CDMA2000 1X-EVDO reverse link with the TCP/IP data segments. The test had been taken under several velocity of vehicle in seoul areas.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.828-832
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• 2009

In this paper we suggest the technique to improve the reliability of U-Health system. The idea is that a video recoding start at only the emergency data of patients. This technique reduces the reliability of U-Health system. In the suggested U-Health system based on video control technique, bio sensors are used to send the state information of patients to a server. The server analyzes the health state of patients from base nodes and start video recoding and sends the video information about the patients in the emergent state to the nearest hospital.

• Journal of the Korean Society of Radiology
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• v.1 no.2
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• pp.13-22
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• 2007

The purpose of this study was to survey a development of the wireless transmission system of medical images for ubiquitous medicine. There have been many changes in medical equipments and medical record medical treatment and medical record within hospital and PACS(Picture Archiving Communication System) which is picture management system for patients can be typical cases. It is difficult to use these automated medical systems unless they are within hospital and in case of rapid image reading in the emergency cases or in absence of doctor, it is difficult to perform it immediately. The present study implemented an image transmission system using CDMA connection so that images in the server can be viewed at any time and in any place. Remote wireless diagnosis based on medical images using PDA is applicable to medical areas that require mobility, and the use of PDA can be an ideal alternative for point of care. The use of PDA enables prompt and accurate access to digital medical images, which in turn reduces medical accidents and improves the quality of medical services through high productivity and efficiency of medical practitioners' works. It also enables quick response to patients' demands and high-quality medical services and, consequently, patients' high satisfaction.

• Journal of Satellite, Information and Communications
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• v.9 no.2
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• pp.80-84
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• 2014

As an integrated technology with IT and biomedical sciences, U-health offers various healthcare services without time and space limit. In order to make a proper diagnosis, doctors need two key technologies: biosignal measurement and high reliability communication technologies. In this paper, we introduce an implementation process of a bio signal system with using an electrocardiography(ECG) sensor, video, global positioning system(GPS), communication module and micro controller unit(MCU).

• Journal of the Korea Society for Simulation
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• v.18 no.4
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• pp.197-206
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• 2009

The medical information system is an effective medical diagnosis assistance system which offers an environment in which medial images and diagnosis information can be shared. However, this system can only stored and transmitted information without other functions. To resolve this problem and to enhance the efficiency of diagnostic activities, a medical image classification and retrieval system is necessary. The medical image classification and retrieval system can improve efficiency in a medical diagnosis by providing disease-related images and can be useful in various medical practices by checking diverse cases. However, it is difficult to understand the meanings contained in images because the existing image classification and retrieval system has handled superficial information only. Therefore, a medical image classification system which can classify medical images by analyzing the relation among the elements of the image as well as the superficial information has been required. In this paper, we propose the method for learning and classification of brain MRI, in which the superficial information as well as the spatial information extracted from images are used. The superficial information of images, which is color, shape, etc., is called low-level image information and the logical information of the image is called high-level image information. In extracting both low-level and high-level image information in this paper, the anatomical names and structure of the brain have been used. The low-level information is used to give an anatomical name in brain images and the high-level image information is extracted by analyzing the relation among the anatomical parts. Each information is used in learning and classification. In an experiment, the MRI of the brain including disease have been used.

• Journal of the Korea Society of Computer and Information
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• v.10 no.3 s.35
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• pp.331-337
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• 2005

'Supplement 23:DICOM SR' announced on April 2000 made possible co-relations between the clinical reports and human body parts by standardizing the exchange of clinical information. DICOM SR uses its own coding schemes and values to represent information, which convey hierarchically structured content items. This paper analyzes radiology reports produced in HIS(Hospital Information System) and categorizes content structures into three parts such as, finding, conclusion, and recommendation, and implements a system which can be used by clinicians. Digital X-ray images and their reports have been managed separately. Since the report made by DICOM SR can refer to images, the integrated information of reports and images is possible.

• Journal of Biomedical Engineering Research
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• v.18 no.4
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• pp.349-356
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• 1997

In this paper, we propose the lossless coding: scheme for progressive transmission of medical images. The input image is decomposed by the proposed fast adaptive subband decomposition method which is suited for a lossless coding. The decomposed images are coded by an arithmetic coder with two conditioning pixels, and the conditioning pixels are selected differently according to the property of the subbands. The conditioning contexts are usually quantized to reduce the conditional state, and the optimization method of quantization is proposed For the purpose of improving compression ratio in this paper. The proposed lossless coding scheme provides the asymmetric structure of cosec and results in better compression ability than the JPEC lossless coding[ 1 ].