• 한국컴퓨터정보학회논문지
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• 제10권3호
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• pp.331-337
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• 2005

DICOM(Digital Imaging and Communications on Medicine) 표준은 2004년 4월에 발표된 "Supplement 23:DICOM SR(Structured Reporting)"을 통해 모든 임상정보의 표준화된 교환이 가능하도록 확장함으로써 의사의 판독보고서와 신체의 특정 부위와의 관계를 체계적으로 연결할 수 있게 되었다. DICOM SR은 정보를 정확하게 표현하기 위해 코드체계를 사용하며, 구성 항목들의 계층적인 트리로써 구조화된 정보를 표현할 수 있다. 본 논문에서는 병원정보시스템의 영상 판독결과 보고서를 분석하여 발견(finding), 결론(conclusion) 및 권고(recommendation)로 세분화하고 구조화한 후 실제로 의사가 진료에 활용할 수 있도록 DICOM SR 시스템을 구현하였다. X-ray와 같은 영상 데이터는 판독결과나 환자의 정보와 같은 텍스트 데이터와 별도로 관리되고 있다. DICOM SR로 표현된 판독결과 보고서는 영상에 대한 참조가 가능하므로 텍스트와 영상이 통합된 정보를 제공할 수 있다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.98-100
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• 2004

We report a novel manner for preparing single layer anti-reflective coatings with excellent optical properties (<1% reflection) over a broad wavelength regime. The technology is based upon the self-assembly and UV curing of reactive nano-particles, leading to nano-structured coatings with a gradient in refractive index. The single processing step leading to such coatings is fast, robust and cost effective. Furthermore in this paper we will address the mechanical durability of such nano-structured coatings.

• Korean Journal of Radiology
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• 제21권12호
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• pp.1326-1333
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• 2020

Objective: To evaluate urologist satisfaction on structured prostate MRI reports, including report with tumor-node-metastasis (TNM) staging (report B) and with Prostate Imaging Reporting and Data System (PI-RADS) score with/without TNM staging (report C, report with PI-RADS score only [report C-a] and report with PI-RADS score and TNM staging [C-b]) compared with conventional free-text report (report A). Materials and Methods: This was a prospective comparative study. Altogether, 3015 prostate MRI reports including reports A, B, C-a, and C-b were rated by 13 urologists using a 5-point Likert Scale. A questionnaire was used to assess urologist satisfaction based on the following parameters: correctness, practicality, and urologist subjectivity. Kruskal-Wallis H-test followed by Nemenyi test was used to compare urologists' satisfaction parameters for each report type. The rate of urologist-radiologist recalls for each report type was calculated. Results: Reports B and C including its subtypes had higher ratings of satisfaction than report A for overall satisfaction degree, and parameters of correctness, practicality, and subjectivity (p < 0.05). There was a significant difference between report B and C (p < 0.05) in practicality score, but no statistical difference was found in overall satisfaction degree, and correctness and subjectivity scores (p > 0.05). Compared with report C-b (p > 0.05), report B and C-a (p < 0.05) showed a significant difference in overall satisfaction degree and parameters of practicality and subjectivity. In terms of correctness score, neither report C-a nor C-b had a significant difference with report B (p > 0.05). No statistical difference was found between report C-a and C-b in overall satisfaction degree and all three parameters (p > 0.05). The rate of urologist-radiologist recalls for reports A, B, C-a and C-b were 29.1%, 10.8%, 18.1% and 11.2%, respectively. Conclusion: Structured reports, either using TNM or PI-RADS are highly preferred over conventional free-text reports and lead to fewer report-related post-hoc inquiries from urologists.

• 정보관리학회지
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• 제19권3호
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• pp.91-110
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• 2002

최근, 키워드 기반 정보검색의 한계를 극복하기 위한 구조문서 기반의 연구가 활발하게 진행되고 있지만, 실제 적용에는 많은 어려움이 존재한다. 본 고에서는 구조문서에 대한 본문검색시스템을 제안한다. 본문검색시스템에 적용된 문서는 XML로 구축된 국가 연구개발보고서를 대상으로 하였으며, XML 연구보고서의 DTD. 본문 간의 이동을 위한 네비게이션 정보추출, 본문검색을 위한 검색엔진의 적용 방안에 관하여 살펴본다. 본 시스템은 XML 문서에 대해 문서의 구조정보를 저장하고 이를 검색하여 다양한 형태로 열람할 수 있는 검색엔진의 부재 상황을 본문검색이라는 방법으로 극복하기 위한 것이다.

• 한국표면공학회지
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• 제53권6호
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• pp.330-342
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• 2020

Since the original report on ferroelectricity in Si-doped HfO2 in 2011, fluorite-structured ferroelectrics have attracted increasing interest due to their scalability, established deposition techniques including atomic layer deposition, and compatibility with the complementary-metal-oxide-semiconductor technology. Especially, the emerging fluorite-structured ferroelectrics are considered promising for the next-generation semiconductor devices such as storage class memories, memory-logic hybrid devices, and neuromorphic computing devices. For achieving the practical semiconductor devices, understanding polarization switching kinetics in fluorite-structured ferroelectrics is an urgent task. To understand the polarization switching kinetics and domain dynamics in this emerging ferroelectric materials, various classical models such as Kolmogorov-Avrami-Ishibashi model, nucleation limited switching model, inhomogeneous field mechanism model, and Du-Chen model have been applied to the fluorite-structured ferroelectrics. However, the polarization switching kinetics of fluorite-structured ferroelectrics are reported to be strongly affected by various nonideal factors such as nanoscale polymorphism, strong effect of defects such as oxygen vacancies and residual impurities, and polycrystallinity with a weak texture. Moreover, some important parameters for polarization switching kinetics and domain dynamics including activation field, domain wall velocity, and switching time distribution have been reported quantitatively different from conventional ferroelectrics such as perovskite-structured ferroelectrics. In this focused review, therefore, the polarization switching kinetics of fluorite-structured ferroelectrics are comprehensively reviewed based on the available literature.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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• pp.310.1-310.1
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• 2013

We show the novel hot electron based-solar energy conversion using tandem structured Schottky diode with double Schottky barriers. In this report, we show the effect of the double Schottky barriers on solar cell performance by enhancing both of internal photoemission and band-to-band excitation. The tandem structured Au/Si diode capped with TiO2 layer as second semiconductor exhibited improved ability for light harvesting. The proposed mechanisms consist of multiple reflections of hot electrons and additional pathway of solar energy conversion due to presence of multiple interfaces between thin gold film and semiconductors. Short-circuit photocurrent measured on the tandem structured Au/Si diodes under illumination of AM1.5 increased by approximately 70% from 3.1% to 5.3% and overall incident photon to electron conversion efficiency (IPCE) was enhanced in visible light, revealing that the concept of the double Schottky barriers have significant potential as novel strategy for light harvesting.

• 대한방사선기술학회지:방사선기술과학
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• 제38권4호
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• pp.483-489
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• 2015

현대의 의료용 방사선 발생장치는 영상을 저장하고 전송하기 위해 의료영상 표준규격으로 Digital image communications in medicine(DICOM)을 채택하고 있다. DICOM 규격에서는 피폭선량 정보 표시를 위해 DICOM dose Structured Report(DICOM dose SR)를 표준으로 제정하여 사용하고 있다. 이와 더불어 DICOM Modality Performed Procedure Step(DIOCM MPPS) 정보와 DICOM tag 정보에서도 부분적인 피폭선량 정보를 표시하고 있다. 본 연구에서는 DICOM과 관련된 피폭선량정보 표시방법에 대해 고찰하고 의료정보 시스템간의 상호연동 테스트를 위한 Integrating the Healthcare Enterprise(IHE)의 Radiation Exposure Monitoring(REM) 프로파일에 대해 살펴보았다. 의료기관에서 의료방사선피폭선량정보에 대한 품질관리를 위해서는 DICOM 정보에서 표시되는 피폭선량 정보형식에 대한 이해가 반드시 수반되어야 하고 장비도입 단계에서 관련 규격에 대한 검토가 이루어져야 한다.

• 한국융합학회논문지
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• 제10권6호
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• pp.33-39
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• 2019

지능형 사이버 공격 기법이 다양화됨에 따라 보안 침해 사건, 글로벌 범죄 등의 사건 발생이 증가하고 있다. 지능형 공격을 예측하고 대응하기 위해서는 공격 기법의 특성, 수법, 유형을 파악해야 한다. 이를 위해 수많은 보안 기업 회사에서는 다양한 공격 기법을 빠르게 파악하고 더 큰 피해를 막기 위해 보안 인텔리전스 보고서를 배포한다. 하지만 각 기업에서 배포하는 보고서에 대한 형식이 맞춰져 있지 않으며, 대량의 비정형 보안 인텔리전스 보고서가 배포되고 있다. 본 논문은 비정형한 보안 인텔리전스 보고서에 대한 문제점을 고려하여 정형화된 데이터로 추출하는 방안을 제안한다. 또한, 대량의 보안 인텔리전스 보고서를 파악하기 위해 소요되는 시간을 줄이고자 대량의 보고서를 주제별로 분류할 수 있는 보안 인텔리전스 보고서 토픽 자동 추출 모델을 제안한다.

• Korean Journal of Radiology
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• 제21권7호
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• pp.869-879
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• 2020

Objective: To evaluate the performance of a convolutional neural network (CNN) model that can automatically detect and classify rib fractures, and output structured reports from computed tomography (CT) images. Materials and Methods: This study included 1079 patients (median age, 55 years; men, 718) from three hospitals, between January 2011 and January 2019, who were divided into a monocentric training set (n = 876; median age, 55 years; men, 582), five multicenter/multiparameter validation sets (n = 173; median age, 59 years; men, 118) with different slice thicknesses and image pixels, and a normal control set (n = 30; median age, 53 years; men, 18). Three classifications (fresh, healing, and old fracture) combined with fracture location (corresponding CT layers) were detected automatically and delivered in a structured report. Precision, recall, and F1-score were selected as metrics to measure the optimum CNN model. Detection/diagnosis time, precision, and sensitivity were employed to compare the diagnostic efficiency of the structured report and that of experienced radiologists. Results: A total of 25054 annotations (fresh fracture, 10089; healing fracture, 10922; old fracture, 4043) were labelled for training (18584) and validation (6470). The detection efficiency was higher for fresh fractures and healing fractures than for old fractures (F1-scores, 0.849, 0.856, 0.770, respectively, p = 0.023 for each), and the robustness of the model was good in the five multicenter/multiparameter validation sets (all mean F1-scores > 0.8 except validation set 5 [512 x 512 pixels; F1-score = 0.757]). The precision of the five radiologists improved from 80.3% to 91.1%, and the sensitivity increased from 62.4% to 86.3% with artificial intelligence-assisted diagnosis. On average, the diagnosis time of the radiologists was reduced by 73.9 seconds. Conclusion: Our CNN model for automatic rib fracture detection could assist radiologists in improving diagnostic efficiency, reducing diagnosis time and radiologists' workload.

• 한국전문물리치료학회지
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• 제11권4호
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• pp.43-49
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• 2004

It is not common in rehabilitation situation to encounter patients exhibiting paralysis or other disabilities which have no apparent organic basis. Even without organic causes for their signs and symptoms these patients often require comprehensive treatment and management. Patients with conversion disorder often pose particular difficulties because of diagnostic confusion and the lack of therapeutic strategies for rehabilitation management. We feel that systematic functional rehabilitation is helpful in resolving symptom and recovering normal function in the patient suffering from conversion disorder since it provides motivation and reduces reinforcements which contribute to sustained disabled state. This report describes the patient with hysterical motor paralysis who is successfully treated with structured physical therapy. The objectives of this report are to provide therapeutic guidelines for physical therapy and to emphasize the role of physical therapist in the assessment and treatment of hysterical paralysis.