PACS운영 시스템 차이에 따른 의료 영상 업로드 시 무손실 압축 방식의 유용성 분석

최지안(Ji-An Choi),황준호(Jun-Ho Hwang),이경배(Kyung-Bae Lee) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.3

본 연구는 타 병원 전원 시 발급받는 의료영상이 서로 다른 소프트웨어를 사용하는 경우 PACS상의 영상화질에 영향을 미칠 수도 있다는 점을 착안하였다. A 대학병원 영상을 DICOM 파일로 복사하여 B 대학병원 PACS상에 등록하였고 해당 대학병원에서 사용하는 소프트웨어의 압축에 따른 용량과 화질을 SNR, CNR, 히스토그램을 통해 평가하였다. 압축률이 커질수록 SNR, CNR은 떨어졌고, 주목할 점은 No Compression에 비해 Lossless Compression은 용량은 1/2로 줄었지만 SNR, CNR은 변화가 없었다. 히스토그램은 압축률이 높아질수록 언더플로우 현상에 의한 정보손실이 눈에 띄게 나타났다. 타 병원 전원 시 병원마다 다른 시스템을 사용하기 때문에, 압축하여 영상을 등록하면 영상의 화질이 저하되고 정보량이 손실되므로 비압축 또는 무손실 압축방식을 사용해야 한다. 결론적으로 업로드 시 대기시간과 경제적 효율성을 고려하면, 무손실 압축방식 사용이 유용하다. This study focused on the fact that medical images that are issued at different hospitals may affect image quality on PACS when different software is used. A university hospital image was copied to the DICOM file and registered on the PACS of the university hospital B. The capacity and image quality of the software used in the university hospital were evaluated by SNR, CNR and histogram. As the compression ratio increased, SNR and CNR tended to decrease. Note that Lossless Compression decreased the data size by half compared to No Compression, but SNR and CNR did not change. As a result of the histogram analysis, the information loss due to the underflow phenomenon was conspicuous. When moving to another hospital, No compression or lossless compression method should be used. In conclusion, it is useful to use the lossless compression method, considering waiting time and economic efficiency in uploading.

다문화가족의 조기정착을 위한 효율적 지원방안

최지안 ( Choi Ji An ) 한국사회복지경영학회 2019 사회복지경영연구 Vol.6 No.1

한국은 최근 다문화 사회로 급속도로 진화했다. 외국인 인구는 전체 인구의 4.6%를 차지하고 있으며 매년 이러한 경향은 점차 증가하고 있다. 다문화사회 란 외국인 인구 비율이 5% 이상이며 2020년이되기 전에 한국이 다문화 사회로 성장할 것으로 기대되는 사회를 말한다. 현재 연구는 다문화 가족을 지원하기 위한 중요한 미래 정책적 영향을 부여하고자 한다. 결혼한 이민자들로 구성된 중요한 것은 조사결과가 한국의 사회 문화적 환경에 적응하고 문화적으로 다양한 공동체에서 사회적 결속에 기여할수 있는 언어적, 문화적, 사회적 격차를 해소하는데 도움이 되는 해결책을 제시한다는 것이다. 한국 사회에서의 조기 해결을 돕기 위해 다양한 정책과 실용 노력이 더 강조되어야 한다. 첫째, 가정 방문 교육자의 도움으로 여성 외국 배우자의 언어 실력을 향상시킬 수 있는 지원이 필요하다. 둘째, 다문화 가정에 대한 경제적 지원을 강화해야 한다. 셋째, 다문화 가족 지원 센터가 다문화 가정에 다양한 서비스를 제공 할 수 있는 능력을 높이기 위한 노력이 필요하다. 넷째, 다문화 가정 상담 서비스가 필요하다. 다섯 째, 다문화 가정 자녀의 학교 생활 적응을 향상시키기 위한 조치가 필요하다. 마지막으로, 다문화 가정이 지역 사회의 다양한 보건 서비스에 쉽게 접근 할 수 있도록 포괄적인 사례 관리가 필요하다. South Korea has recently evolved into a multicultural society at a rapid pace: foreign residents accounted for 46% of the entire population, and this trend is steadily increasing every year. The multicultural society refers to a society where the proportion of foreign residents of the total population is over 5 percent, and South Korea is expected to become a multicultural society before 2020. The current study aims to impart important future policy implications to support multiculturalfamilies (primarily composed of married immigrants). Importantly, the findings of the study suggest solutions that help them adapt to the sociocultural environment of South Korea and bridge the linguistic, cultural, and social gaps,which may contribute to social cohesion in culturally diverse communities. Multicultural families encounter many obstacles in their early settlement years. These include: difficulties in communication skills; heterogeneity of cultural patterns; difficulties in childcare; marital conflict and domestic violence; child's poor academic performance and maladjustment to school; poverty problems; prejudice and discrimination against female foreign spouses; a lack of communication among immigrant groups; and insufficient support services for multicultural families. Such issues need attention as they make the living conditions of multicultural families more painful, and often leads to more severe problems including problems with marriage (spousal abuse, separation, and divorce), and school (bullying). To help their early settlement in Korean society, various policy and practical efforts should be further addressed. First,there is a need to support female foreign spouses to enhance their language skills with the help of home-visiting educator Second, economic support should be strengthened for multicultural families. Third,more efforts are warranted to increase the ability of multicultural family support center to provide a wide range of services to multicultural families. Fourth, providing counseling services to multicultural families are required. Fifth,actions are needed to improve school life adjustment of children in multicultural families. Lastly, comprehensive case management is necessary to allow multicultural families to have easy access to various health services in the community.

한국의 펌의 역사에 관한 연구(1910년대~2000년대)

최지안 ( Ji-an Choi ),이영미 ( Young-mi Lee ) 한국미용예술경영학회 2008 미용예술경영연구 Vol.2 No.1

The rapid development of modern society has entailed the change of mind-set. And there are changes in the standard of beauty and its trend along with the flow of the changing times as well. Modern people express themselves not only through clothes but in a liberal and diverse manner. Specifically, hairstyle is one of the ways for them to express themselves, and that is one of primary factors to determine their first impression at the same time. Relevant literature including books and the Internet were investigated to find out the history of perm in Korea. In Korean society, perm made a great contribution to changing people’s way of thinking as well as beauty trends. And that was part of hairstyle that is esthetic and marked by practicality that was increasingly important in current society where there was an increase in the number of working men and women. The flow of beauty was a mirror of the times, and the types and tools of perm were under the great influence of the source of energy. The technical advance served to diversify the sorts of perm, and looking into the history of perm made it possible to anticipate what would be to come in the field of perm.

환자안전에 대한 간호장교, 간호군무원의 지식, 태도, 수행 측정도구 개발

최지안 ( Ji An Choi ),금경림 ( Kyeong Lim Keum ),최선영 ( Seon Yeong Choi ),김명자 ( Myung Ja Kim ) 국군간호사관학교 군진간호연구소 2015 군진간호연구 Vol.33 No.2

Purpose: The study aimed to develop an instrument to measure patient safety knowledge, attitude and skills among nursing officers and civilian military nurses working for military hospitals in South Korea. Methods: The primary questionnaire was established through comprehensive literature review and revised after content validity examination by the experts. 480 subjects were asked to participate in the study and finally 434 out of 480 answers were included for the analysis. Psychometric properties of the instrument were examined, including the content and construct validity (exploratory factor analysis with varimax rotation) and the reliability (internal consistency). Results: The total number of questions for the final instrument was 71. Attitude (30) and skills (24) questions were psychometrically sound. The reliability of the knowledge (17) questions was low, however, the value of the reliability was estimated within acceptable range. Conclusion: The obtained data using the instrument would be expected to serve as the basis for the patient safety education and evaluation. This study suggested that the developed instrument is a useful tool to investigate the patient safety competencies.

전두-안와 구역에 발생한 섬유성 이형성증의 근치적 절제술 및 자가두개골 이식을 이용한 재건을 통한 치료: 증례보고

최지안(Ji-An Choi),곽정하(Jung-Ha Kwak),윤청민(Chung-Min Yoon) 대한두경부종양학회 2021 대한두경부 종양학회지 Vol.37 No.1

Fibrous dysplasia is a bone condition characterized by the replacement of normal bone tissue and the medullary cavity by abnormal fibrous tissues. Craniofacial fibrous dysplasia causes facial asymmetry compromising the aesthetics as well as vision and hearing. A 21-year-old male visited the clinic due to vertical orbital dystopia and exophthalmos that had developed over the previous 2 months. The patient was diagnosed with a fibrous dysplasia of the frontal, ethmoid bones and superior orbital wall. By a bicoronal incision on the scalp, the radical resection of the lesions was done. After harvesting the remaining frontal bone, we did the autogenous reconstruction using split calvarial bone graft. Postoperatively, the vertical orbital dystopia and exophthalmos significantly improved. The patient is satisfied with the surgical outcomes and has not reported any recurrence.

도시가스의 시장리스크프리미엄(RP) 적정성 분석

최지안(Choi ji-an),정희용(Chung Hee-yung),김보식(Kim bo-sik) 한국가스학회 2023 한국가스학회 학술대회논문집 Vol.2023 No.11

인터벤션에서 자동노출제어장치 이용 시 내장형 면적 선량계와 이동형 면적 선량계의 면적선량 비교를 통한 선량계 오차분석과 교정지침 필요성 연구

최지안(Ji-An Choi),황준호(Jun-Ho Hwang),이경배(Kyung-Bae Lee) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.11

본 연구는 인터벤션 장비의 자동노출제어장치(Automatic Exposure Controller, AEC) 이용 시 내장형면적 선량계와 교정된 이동형 면적 선량계의 오차를 분석하여 선량계 교정의 중요성과 교정지침의 필요성을 알아보고자 하였다. 실험방법은 NEMA 팬텀의 메뉴얼에 따라 팬텀을 Thin, Normal, Heavy Adult로 조립하고 내장형 면적 선량계와 이동형 면적 선량계로 면적선량을 측정하였다. 그 결과 모든 두께에서 내장형 면적 선량계가 이동형 면적 선량계보다 나타내는 선량 값이 높았고 두께가 두꺼울수록 그 차이가 커졌다. 또한 각 항목에 대하여 paired t-test를 시행하였고, 그 결과 각 항목은 p<0.05로 유의한 차이가 있었다. 결론적으로 피폭에 많이 노출되는 인터벤션 시술을 고려해 볼 때, 장비의 자동노출제어장치 사용시 정확한 선량 파악 여부가 중요하고 현재 내장된 면적 선량계에 대한 교정지침이 없으므로 교정지침을 마련하는 것이 필요하다. The purpose of this study was to analyze the errors of the built - in dose area product and the calibrated moving dose area product when using automatic exposure controller of the interventional equipment. And then, the importance of the dosimeter calibration and the necessity of the calibration guideline were investigated. The experimental method was to assemble the phantom into Thin, Normal, and Heavy Adult according to the NEMA Phantom manual and to measure the dose area with the built-in dose area product and the moving dose area product. As a result, in all thicknesses, the built-in dose area product showed higher doses than the moving dose area product, and the thicker the thickness, the larger the difference. In addition, paired t-test was performed for each item and there was a significant difference in each item between p<0.05. In conclusion, considering the intervention which is highly exposed to the radiation exposure, it is that we have to know the accurate dose when using the AEC of the equipment. And there is no calibration guide for the built-in dose area meter, thus calibration guidelines should be prepared.

Analysis of static postural balance in patients with Parkinson’s disease

Ji-Won Kim(김지원),Ji-An Choi(최지안),Yu-Ri Kwon(권유리),Do-Young Kwon(권도영) 대한인간공학회 2022 대한인간공학회 학술대회논문집 Vol.2022 No.10

고딕ㆍ르네상스 시대 헤어스타일의 비교분석에 관한 연구

이영미 ( Young-mi Lee ),최지안 ( Ji-an Choi ) 한국미용예술경영학회 2008 미용예술경영연구 Vol.2 No.1

This study examines the effect of socio-cultural background and historical background of costume on hairstyle during the Gothic and Renaissance period. In addition, changes in hairstyle were studied through a comparative analysis. As method of study, previously conducted studies and documented materials were used. Moreover, further examination was conducted using documented images and photographs containing portraits from the time period. The results of this study can be summarized as follows : 1) During the gothic period, chastity was persistently demanded due to emphasis on religious values. As a result, veil were worn to cover the head, and in order to display adoration toward the heavens, the hennin became popular. On the other hand, natural physical beauty was emphasized in the renaissance period due to the pursuit of humanism. Accordingly, hair and ears that were hidden were revealed and were used for decorative effects. 2) Costume of the gothic period was not overstated. As a result, they were able to wear their hair down in a natural hairstyle. Meanwhile, costumes during the renaissance period were overstated due to enlargement of ruff. As a result, men cut their hair short and women wore their hair tied up. 3) Hairstyle appeared differently in the gothic period and the renaissance period. They appear to have been influenced by social atmosphere as well as by costume styles that were popular.

2D바코드를 활용한 모바일 3D 가상 피팅 서비스

최자령(Ja-Ryoung Choi),최지안(Ji-An Choi),이은지(Eun-Ji Lee),임순범(Soon-Bum Lim) 한국멀티미디어학회 2008 한국멀티미디어학회 학술발표논문집 Vol.2008 No.2

본 논문에서는 언제 어디서든 휴대폰을 이용하여 3D 가상 피팅을 해 볼 수 있는 모바일 3D 가상 피팅 서비스를 구현하였다. 사용자가 백화점 쿠폰북이나 홈쇼핑 카탈로그, 의류 카탈로그 등에 인쇄 된 2D 바코드를 휴대폰 카메라로 촬영하여 서버로 전송하면, 서버에서는 인식한 2D바코드를 해독하여 3D 스캔을 받은 자신의 아바타를 이용해 가상 피팅을 한 GIF 애니메이션 이미지를 생성한다. 서버에서 생성된 가상 피팅 이미지를 사용자의 휴대폰으로 전송하여, 사용자가 휴대폰을 통해 가상 피팅을 체험할 수 있도록 하였다.