• Journal of Broadcast Engineering
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• v.17 no.1
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• pp.73-80
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• 2012

Recently, medical equipments are developed and used for diagnosis or studies. In addition, demand of techniques which automatically deal with three dimensional medical images obtained from the medical equipments is growing. One of the techniques is automatic bone segmentation which is expected to enhance the diagnosis efficiency of osteoporosis, fracture, and other bone diseases. Although various researches have been proposed to solve it, they are unable to be used in practice since a size of the medical data is large and there are many low contrast boundaries with other tissues. In this paper, we present a fast and accurate automatic framework for bone segmentation based on multi-resolutions. On a low resolution step, a position of the bone is roughly detected using constrained branch and mincut which find the optimal template from the training set. Then, the segmentation and the registration are iteratively conducted on the multiple resolutions. To evaluate the performance of the proposed method, we make an experiment with femur and tibia from 50 test knee magnetic resonance images using 100 training set. The proposed method outperformed the constrained branch and mincut in aspect of segmentation accuracy and implementation time.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.285-288
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• 2013

의료영상에서의 노이즈는 환자 진단에 있어서 막대한 영향을 미치는 영상의 화질을 떨어트림으로써, 진단에 대한 유효성을 낮추게 된다. 특히, 현재 이슈화 되고 있는 저선량 의료영상은 기존의 고선량 의료영상보다 노이즈 레벨이 높으며, 이에 따라서 의료영상에서의 노이즈 제거 기술은 매우 중요한 사안으로 부각되고 있다. 본 논문에서 제시하는 노이즈 제거 기술은 각각의 투영 영상을 여러개의 부대역(sub-band)으로 분해하는 것으로부터 시작한다. 분해된 각각의 부대역 영상은 엣지 검출기를 통하여 엣지 부분과 평탄한 영역으로 구별되어 진다. 검출된 엣지는 0 ~ 1 사이의 값으로 정규화 되며, 퍼지기반의 연산을 통하여 엣지의 확실성을 나타내는 엣지맵으로 변환하게 된다. 이 엣지맵을 통하여 각 부대역 영상의 필터링 정도를 제어하고, 분해된 각 부대역을 결합하는 방식을 취함으로써 영상의 엣지 부분을 최대한 보존하면서 노이즈는 효과적으로 제거하도록 하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.301-304
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• 2021

4차 산업혁명 시대가 도래함에 따라 사물인터넷(IoT)이 다양한 산업의 영역에서 활용되고 있다. 특히 IoT 기술 및 서비스를 활용하는 분야 중 하나인 스마트 의료 분야는 최근 소프트웨어 및 네트워크의 연결성이 강화되면서 사이버보안 사고가 급증하고 있다. 따라서 스마트 의료 기기·서비스 개발단계부터 보안을 고려하여 안전하게 개발하는 것이 필요하며, 서비스 제공시에도 보안을 고려하여 안전하게 관리 및 서비스를 제공하는 것이 필요하다. 이에 본 연구에서는 IoT 서비스 활용 분야 중 스마트 의료 분야에서 원격의료 서비스의 개인정보 침해 요인을 도출하고 이를 토대로 어택트리 기반의 시나리오 분석을 수행하고자 한다.

• Journal of radiological science and technology
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• v.37 no.4
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• pp.295-305
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• 2014

This study is to provide accurate information as medical imaging equipment to check for the presence of body disease US equipment. We investigated the status of medical US equipment performance in Daegu and criteria US phantom (ATS-539) for US equipment performance measurements. The results in this study, 1. US phantom measurement results: The test passed rate were 88.6% and the failed rate were 11.4%. 2. The difference between the group of mean and the pass/failed groups were statistically significant. Focal zone and 4 mm functional resolution in the two items that are not present the passing standard. 3. The difference was statistically significant number of years and used equipment and pass the failed equipment (4.13 vs 7.25 years). We investigated the performance status of US equipment used in the clinical area in Daegu. The basis for the two items are not present this proposed passing standard. Equipment performance was associated with the number of years of using US equipment. It is necessary to maintain the best performance of the equipment phantom measurements for performance testing of US equipment.

• Journal of radiological science and technology
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• v.36 no.4
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• pp.281-290
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• 2013

This study aimed to assess whether the changes in compliance rates of evaluation criteria after healthcare accreditation among radiologic technologists working at four university hospitals which had acquired healthcare accreditation in Daejeon metropolitan area. In this study, the evaluation criteria of healthcare accreditation were reclassified and reevaluated to three areas which include patient safety, staff safety, and environmental safety. Each area has eight, three, and five questions, respectively. Each compliance rate was quantitatively measured on a scale of 0 to 10 before and after in this study. The result shows that the overall compliance rates were decreased on all areas compared to the time healthcare accreditation was obtained. The compliance rate of hand hygiene was drastically reduced. To maintain the compliance rates, not only individuals but healthcare organizations should simultaneously endeavor. In particular, healthcare organizations should make an effort to provide continuous education opportunity to their workers and supervise the compliance regularly.

• The Journal of the Korea Contents Association
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• v.14 no.7
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• pp.281-290
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• 2014

This study is a quasi-experimental research using non-equivalent control group pre-post design in order to understand the effectiveness of biomedical ethics education using movies. This study selected the first-year 45 students and 63 students who were attending at two 4-year-course nursing colleges as an experimental group and control group, respectively. Then, this study provided the experimental group with the lecture on biomedical ethics for 16 weeks using the movie related to the ethical issues covering 10 areas. Data collection was done for 5 days from August 26, 2013 until December 5, 2013, and conducted pre-post questionnaire survey on the 1st week session and 16th session after explaining there search purpose and getting a written agreement from the subjects. As a result of analysis of the collected data using SPSS Statistics 18, it was found that students' average point of biomedical ethics awareness improved to 3.31 from 3.07; additionally, in the analysis of the data by sub-area, the point in artificial abortion improved to 3.69 from 3.08; artificial insemination from 2.99 to 3.57; fetal diagnosis from 3.10 to 3.45; a newborn's right to life from 3.39 to 3.55 and organ transplant from 3.26 to 3.53, respectively(P<.001). On the contrary, the research results showed that there was no change in the point of the mercy-killing, brain death, and human biotechnology areas, respectively(p>.05). Conclusively, movie-aided education could be diversely used for nursing education provided movie contents should be in accord with a lecture subject in a way that can arouse students' interest and concern, and improve educational satisfaction.

• The KIPS Transactions:PartB
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• v.18B no.3
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• pp.131-138
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• 2011

In this paper, we compare our proposed method with previous methods for the volumetric image segmentation using level set. In order to obtain an exact segmentation, the region and boundary information of image object are used in our proposed speed function. The boundary information is defined by the gradient vector flow obtained from the gradient images and the region information is defined by Gaussian distribution information of pixel intensity in a region-of-interest for image segmentation. Also the regular term is used to remove the noise around surface. We show various experimental results of real medical volume images to verify the superiority of proposed method.

• Journal of the Institute of Convergence Signal Processing
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• v.3 no.1
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• pp.33-40
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• 2002

In this paper, we proposed a lossless compression algorithm of medical images which is essential technique in picture archive and communication system. Mammographic image and magnetic resonance image in among medical images used in this study, proposed a region growing segmentation algorithm for compression of these images. A proposed algorithm was partition by three sub region which error image, discontinuity index map, high order bit data from original image. And generated discontinuity index image data and error image which apply to a region growing algorithm are compressed using JBIG(Joint Bi-level Image experts Group) algorithm that is international hi-level image compression standard and proper image compression technique of gray code digital Images. The proposed lossless compression method resulted in, on the average, lossless compression to about 73.14% with a database of high-resolution digital mammography images. In comparison with direct coding by JBIG, JPEG, and Lempel-Ziv coding methods, the proposed method performed better by 3.7%, 7.9% and 23.6% on the database used.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.13 no.6
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• pp.511-522
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• 2020

The purpose of this thesis is to derive a strategy to establish an ecosystem for promoting health my data projects in the public domain. To this end, first, the types of my data business were classified by business domain, subject, purpose, and method, and based on this, my data business being promoted in Korea and abroad was analyzed by type. After that, based on the analysis results, scenarios for my data projects that public domain can promote and the roles and major issues of each subject were identified, and the strategic direction for each subject of the ecosystem was presented. Such an attempt is of primary significance in revealing the role that the health MyData project can take the lead in the public domain to settle in Korea targeting sensitive information. Through this, it is expected that it will be a cornerstone of discussion to identify issues that are expected to establish an ecosystem in Korea, and to present a direction in which the my data business can be promoted in the right direction in the future.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.7-7
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• 2019

우리나라에서의 대마는 마약류로 분류되어 기호용과 의료용 모두 법적인 제재를 받아왔으나 최근에 의료용 대마가 법적으로 허용이 되어 환자들에게 처방 받을 수 있게 되었다. 하지만 우리나라 사람들에게 대마는 환각성분을 가진 마약류로 깊이 인식되어 왔으며 의료용 대마에 대한 연구는 거의 전무한 실정이다. 노지재배에서 발생할 수 있는 범죄의 위험성, 자연교배에 의한 품질저하를 피할 수 있으며 재배조건(양액, 광조건, 광주기, 대기환경조성) 등을 제어할 수 있는 밀폐형 LED 식물공장은 의료용 대마 생산에 제일 적합한 모델이 될 수 있다. 식물체의 광합성은 가시광선 중 특정 파장 450nm 청색광과 660nm 적생광을 주로 이용하며 'LED (Light Emitting Diode) 발광다이오드'는 식물체의 광합성에 적합한 파장으로 광원을 조사할 수 있는 장점이 있다. 이러한 LED를 이용한 광합성은 식물체의 2차 대사물질 Anthocyanins, phenolic compounds 등의 향상과 생육에도 긍정적인 영향을 미치며 식물 뿐만 아니라 광합성을 하는 미세조류(micro algae)에서도 이용이 가능하며 해마토 코쿠스(Hematococcus)의 세포증식과 항산화물질 아스타잔틴(astaxathin)생산에 유용하게 쓰이고 있다. 최근 미국과 다른 나라에서도 기호용, 의료용 대마사업에 대한 관심이 높아지고 있으며 캐나다와 미국에서는 밀폐형 유리온실과 식물공장을 이용한 의료용 대마를 생산, 추출, 가공까지 하여 산업적인 영역을 넓히고 있는 실정이다. 특히, 실내재배에서는 광원이 필수적인 요소이며 식물생육에 선택적인 파장을 조사할 수 있는 LED와 재배조건을 정밀하게 제어할 수 있는 밀폐형 식물공장을 이용한 의료용 대마 생산에 대한 연구가 절실히 필요한 시점이다.