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( Min Keun Cho ),( Sung-hoon Moon ),( Tae Jun Song ),( Raymond E. Kim ),( Dong Wook Oh ),( Do Hyun Park ),( Sang Soo Lee ),( Dong Wan Seo ),( Sung Koo Lee ),( Myung-hwan Kim ) 대한간학회 2018 Gut and Liver Vol.12 No.5
Background/Aims: Differentially diagnosing focal-type autoimmune pancreatitis (f-AIP) and pancreatic cancer (PC) is challenging. Contrast-enhanced harmonic endoscopic ultrasound (CEH-EUS) may provide information for differentiating pancreatic masses. In this study, we evaluated the usefulness of CEH-EUS in differentiating f-AIP from PC. Methods: Data were collected prospectively and analyzed on patients who underwent CEH-EUS between May 2014 and May 2015. Eighty consecutive patients were diagnosed with f-AIP or PC. PC and f-AIP were compared for enhancement intensity, contrast agent distribution, and internal vasculature. Results: The study group comprised 53 PC patients and 27 f-AIP patients (17 with type-1 AIP [15 definite and two probable], two with probable type-2 AIP, and eight with AIP, not otherwise specified). Hyper- to iso-enhancement in the arterial phase (f-AIP, 89% vs PC, 13%; p<0.05), homogeneous contrast agent distribution (f-AIP, 81% vs PC, 17%; p<0.05), and absent irregular internal vessels (f-AIP, 85% vs PC, 30%; p<0.05) were observed more frequently in the f-AIP group. The combination of CEH-EUS and enhancement intensity, absent irregular internal vessels improved the specificity (94%) in differentiating f-AIP from PC. Conclusions: CEH-EUS may be a useful noninvasive modality for differentially diagnosing f-AIP and PC. Combined CEH-EUS findings could improve the specificity of CEH-EUS in differentiating f-AIP from PC. (Gut Liver 2018;12:591-596)
미세 대조도 영상을 기반한 디지털 방사선 영상 시스템의 자동노출제어 조절인자 간의 상관관계 분석
임세훈(Lim Se-Hun),성열훈(Seoung Youl-Hun) 대한방사선과학회(구 대한방사선기술학회) 2021 방사선기술과학 Vol.44 No.1
The purpose of this study was to analyze the effect of automatic exposure control (AEC) control factors in digital radiography systems based on the fine contrast images using coin phantoms. The AEC control factors were targeted at the range of dominent zone, sensitivity, and density. The dominent zone was divided into cases where a single coin was used to cover the field configuration, and cases where seven coins were used to cover the field configuration. The sensitivity was classified into three stages (200, 400, 800) and the density was classified into three stages (2.5, 0, 2.5). Image quality was evaluated by signal to noise ratio (SNR) and contrast to noise ratio (CNR). Then, the automatically exposed tube current was measured. As a result, the X-ray image of seven coins obtained a result value of about 1.2 times higher for SNR and 1.9 times higher for CNR than the X-ray image for one coin. The tube current was also about 1.6 times higher. In conclusion, In AEC, the higher the field configuration and dominent zone are matched and the higher the density, the lower the sensitivity, which increases the tube current and CNR, which increases the image quality. Therefore, it is judged that the appropriate setting of the range of dominent zone, sensitivity, and density of the control, which is the AEC control factor, could improve the fine contrast of images.
다양한 크기의 척추침을 이용한 IOHEXOL 척수강조영술 : 부작용의 발생빈도를 중심으로
이용철 대한영상의학회 1992 대한영상의학회지 Vol.28 No.1
Side effects of iohexol myelography are known to largely depend on the leakage amount of cerebrospinal fluid at the puncture site of the dura. To evaluate the relationship between side effect incidence and spinal needle size and to assess the possibility of performing myelogrphy in outpatients, iohexol myelography was performed in 100 patients (58 inpatients and 42 outpatients) using variable sized needles. A questionaire including presence or absence, duration and degree of various side effects was used for evaluation of side effects. The overall side effects included headache(15%), back pain (14%), dizziness(9%), and nausea (4%), etc. The incidences of side effects were 28.0% in total, and 16.7%, 23.5%, 26.3%, 46.4% in patients using 25G, 23G, 22G, 21G spinal needles, retrospectively. The difference of side effect incidence was not significant between male and female. In conclusion, the use of fine spinal needles (25-26G) is recommended to decrease the side effect incidences in myelgraphy. Our findings support the use of fine needle myelography as a safe, less side-effect procedure, not only for in patients but also for out patients.
들로네 (S. Delaunay) 의 직물디자인에 나타난 리듬과 색체에 관한 연구
정혜정(Hye Jung Chung) 한국복식학회 2000 服飾 Vol.50 No.6
This paper analyses the geometric aspect of Sonia Delaunay`s works on the basis of design elements and principles. Geometric pattern is one of the distinct features of early 20th century avant-garde works. The significance of its pattern and colour comes from the fact that it has not only influenced the contemporary fine art but also offered the basic principle of modern costume design. In 1925 she was designing clothes which could be worn today without appearing old-fashioned. She foresaw the future trends in fashion and interior decoration. One might claim she belongs to the avant-garde even today and no less astonishing a phenomenon than she was in 1925. Sonia Delaunay`s art was one of the first expressions of abstract painting and her simultaneous contrasts are among the earliest example of the aesthetic. In Delaunay`s geometric abstraction it is found that the technique of simultaneous contrasts is exploited almost without exception. Colour as well as Collage was the favourite technique Delnaunay used in creating a distinct simultaneity. Many inobjective paintings as she herself called unite the rigour of simple geometric forms with an inner life and poetry which emanate from the richness of the colour, the musicality of the rhythm, the vibrant breadth of the execution.
Present status and perspectives of endosonography 2017 in gastroenterology
Michael Hocke,Barbara Braden,Christian Jenssen,Christoph F. Dietrich 대한내과학회 2018 The Korean Journal of Internal Medicine Vol.33 No.1
Endoscopic ultrasound has become an essential tool in modern gastroenterology and abdominal surgery. Compared with all other endoscopic methods, it has the most potential for innovation and its future looks bright. Thus, we compiled this summary of established and novel applications of endoscopic ultrasound methods to inform the reader about what is already possible and where future developments will lead in improving patient care further. This review is structured in four parts. The first section reports on developments in diagnostic endoscopic ultrasound, the second looks at semi-invasive endoscopic ultrasound, and the third discusses advances in therapeutic endoscopic ultrasound. An overview on the future prospects of endoscopic ultrasound methods concludes this article.