• The Journal of Korean Society for Radiation Therapy
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• v.35
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• pp.41-51
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• 2023

Purpose: This study compares and analyzes the image quality of 3D-CBCT(Cone Beam Computed-Tomography) and Gated CBCT according to baseline changes during SBRT(Stereotactic Body RadioTherapy) in lung cancer patients to find a useful CBCT method for correcting movement due to breathing Materials and methods : Insert a solid tumor material with a diameter of 3 cm into the QUASAR^TM phantom. 4-Dimentional Computed-Tomography(4DCT) images were taken with a speed of the phantom at period 3 sec and a maximum amplitude of 20 mm. Using the contouring menu of the computerized treatment planning system Eclipse^TM Gross Tumor Volume was outlined on solid tumor material. Set-up the same as when acquiring a 4DCT image using Truebeam STx^TM, breathing patterns with baseline changes of 1 mm, 3 mm, and 5 mm were input into the phantom to obtain 3D-CBCT (Spotlight, Full) and Gated-CBCT (Spotlight, Full) images five times repeatedly. The acquired images were compared with the Signal-to-Noise Ratio(SNR), Contrast-to-Noise Ratio(CNR), Tumor Volume Length, and Motion Blurring Ratio(MBR) based on the 4DCT image. Results: The average Signal-to-Noise Ratio, Contrast-to-Noise Ratio, Tumor Volume Length and Motion Blurring Ratio of Spotlight Gated CBCT images were 13.30±0.10%, 7.78±0.16%, 3.55±0.17%, 1.18±0.06%. As a result, Spotlight Gated-CBCT images according to baseline change showed better values than Spotligtht 3D-CBCT images. Also, the average Signal-to-Noise Ratio, Contrast-to-Noise Ratio, Tumor Volume Length and Motion Blurring Ratio of Full Gated CBCT images were 12.80±0.11%, 7.60±0.11%, 3.54±0.16%, 1.18±0.05%. As a result Full GatedCBCT images according to baseline change showed better values than Full 3D-CBCT images. Conclusion : Compared to 3D-CBCT images, Gated-CBCT images had better image quality according to the baseline change, and the effect of Motion Blurring Artifacts caused by breathing was small. Therefore, it is considered useful to image guided using Gated-CBCT when a baseline change occurs due to difficulty in regular breathing during SBRT that exposes high doses in a short period of time

• The Monthly Diabetes
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• s.261
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• pp.46-47
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• 2011

서울대병원 약물유해반응 관리센터와 지역약물감시센터가 공동으로 일반인들을 대상으로 '약물유해반응 경험 및 인식도 조사'를 한 결과 우리나라 성인 10명 중 2명은 의약품 부작용을 직접 경험하고도 적극적으로 조치하지 않은 것으로 나타났다. 또 약물유해반응으로 인해 조취를 취한 경우는 20.8%에 그쳐 의약품 부작용에 관한 홍보가 절실한 것으로 드러난다.

• Tuberculosis and Respiratory Diseases
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• v.48 no.3
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• pp.308-314
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• 2000

Background : DNA fingerprinting of Mycobacterium tuberculosis with RFLP is a very useful tool for deciphering the molecular epidemiology of tuberculosis. An international comparison of the RFLP pattern became possible with the proposal to standardize RFLP methodology using Pvu-II restricted IS-6110, and the comparison has noted some predominance of RFLP pattern in East Asia. The RFLP patterns of tuberculosis strains collected at SNUH was studied and was compared with other strains from East Asia. Method : Fifty strains of M. tuberculosis were isolated from patients who visited 'or were admitted to the SNUH in 1998. Some isolates belonging to the Beijing family were also received. After the extraction of DNA from M. tuberculosis isolates, the chromosomal DNAs were digested with Pvu-II and analyzed by the Southern blot method with DNA probe to IS6110. Result : Six strains belonged to the Beijing family. The RFLP patterns of other 9 strains were similar to each other. No statistically significant endobronchial tuberculosis, presence of underlying disease. and the province of residence were found. Conclusion : Few groups of M. tuberculosis strains from SNUH showed similar RFLP patterns, but their clinical implications are not yet clear.

• Journal of Dental Rehabilitation and Applied Science
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• v.39 no.3
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• pp.146-157
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• 2023

The bite collapses due to posterior teeth loss or wear results in inadequate space for restoration and esthetic concerns. Increasing the occlusal vertical dimension to improve space deficiency rotates the mandible posteriorly, creating a gap between the maxillary and mandibular anterior teeth, leading to loss of anterior guidance. To solve this problem, the prosthodontics or orthodontics treatments are the commonly used methods for proper anterior guidance. However, it is reasonable to assume that the anterior teeth can naturally relapse to their original position when the occlusal force is eliminated. Therefore, this case report aimed to test whether natural relapse could recover the lost anterior guidance to develop a less invasive and more convenient treatment method. Digital superimposition was used to evaluate the changes in anterior teeth alignment to confirm the change of the recovered anterior guidance. The appropriate indications for this new treatment method were defined and applied clinically.

• Journal of the Korean Society of Radiology
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• v.81 no.6
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• pp.1334-1347
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• 2020

Coronavirus disease (COVID-19) has threatened public health as a global pandemic. Chest CT and radiography are crucial in managing COVID-19 in addition to reverse transcription-polymerase chain reaction, which is the gold standard for COVID-19 diagnosis. This is a review of the current status of the use of chest CT and radiography in COVID-19 diagnosis and management and anㄷ introduction of early representative studies on the application of artificial intelligence to chest CT and radiography. The authors also share their experiences to provide insights into the future value of artificial intelligence.

• The Korean journal of helicobacter and upper gastrointestinal research
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• v.18 no.4
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• pp.275-276
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• 2018

42세 여자가 갑작스러운 복통으로 소화기내과 외래를 방문하였다. 환자는 당일 건강검진 대장내시경이 예정되어 있었으며 전날 밤 장정결제인 피코라이트 산(sodium picosulfate hydrate 10 mg, magnesium oxide 3.5 g, citric acid 12 g; Pharmbio Korea Inc., Seoul, Korea)을 물에 녹이지 않고 그냥 복용한 후부터 증상이 발생하였다. 신체 검사에서 복부는 부드러웠으며 압통은 없었다. 즉시 시행한 상부위장관 내시경 검사에서 황색의 두터운 가피가 덮여 있는 다발성 병변이 위체부 대만 및 저부에서 관찰되었다(Fig. 1A). 가피는 생검 겸자를 이용해 쉽게 벗겨졌으며(Fig. 1B), 가피를 제거한 후 급성 출혈성 미란 병변들이 확인되었다(Fig. 1C). 이 환자에서 관찰된 위병변의 진단은 무엇인가?

• Korean Journal of Clinical Laboratory Science
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• v.54 no.3
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• pp.224-238
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• 2022

The environment and scope of work of optometric personnel in ophthalmology are unknown. We aimed to investigate these topics using an online survey. Based on the results obtained, we also make policy proposals from the perspective of clinical laboratory technologists to the University-Association-Academy. The age distribution of the study subjects was as follows; 20s (40.7%), 30s (28.4%), 40s (23.5%), and 50s (7.4%). Women constituted 56.0% of the cohort, and careers were evenly distributed from <1 to ≥15 years. We found optometric personnel had high levels of work-related stress, frequent occupational diseases, and that their duties were wide in scope. More manpower is needed to reduce work stress and improve work satisfaction. Clinical laboratory technologists held more senior positions at 48% compared to others and the occupational distribution was closely related to the senior occupation (P<0.001). Clinical laboratory technologists were responsible for about 30 types of eye examinations, and the most frequently performed examination was the refraction test; anomaloscopic examinations took the most time (27 minutes). Taken together, clinical laboratory technologists perform various eye exams. Given the importance of clinical laboratory technologists in optometry, a multifaceted effort is required at the University-Association-Academy.

• Journal of Korean Clinical Nursing Research
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• v.15 no.1
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• pp.149-165
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• 2009

Purpose: This study was done to identify the causes of turnover in nursing staff in small and medium‐size hospitals and prepare measures to decrease turnover. Nurses in these hospitals were surveyed focusing on their nursing activities, reasons for turnover, and content of their work. Method: A mail survey of hospitals with 300 beds or less was conducted using a questionnaire including items on the current state of nursing, performance of nursing tasks, turnover of nurses, working conditions, and supports and policies related to insufficient number of nurses. Results: The average number of nurses per 100 beds was 37.5, 3.3 less than the prescribed level of 40.8. The turnover rate was higher when the level of remuneration for nursing care was low, and the most frequent reason for nurses leaving was 'move to another hospital', showing that there is a continuous chain of moves for nurses. Other frequent reasons were situations related to working conditions such as childbirth, child care, irregular working hours, night work, and low wages. Conclusion: To guarantee adequate nursing coverage in these hospitals, working conditions for nurses should be improved, including higher wages, a more flexible work system, and installation and operation of 24-hour child care facilities.

• The Science & Technology
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• v.31 no.5 s.348
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• pp.30-31
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• 1998

지난2월18일부터 3일간 일본 동경 게이오플라자 호텔에서 아시아의 심혈관 학자들이 참석한 가운데 제6차 아시아 심혈관학회의 학술발표가 열렸다. 대회 첫날엔 서울대 서경필교수가 한국의 심혈관외과 현황에 대한 브리핑을 했고 한국측에서 11개의 논문이 발표되었다. 필자인 울산의대 서울 중앙병원 이재원 교수는 「대동맥 판막 치환후 좌심실근 비후의 변화」라는 논문을 발표해 큰 관심을 모았다.

• 건강소식
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• v.31 no.9 s.346
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• pp.6-13
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• 2007

이 세상의 소리를 들을 수 없다면 어떨까? 적막강산에 있는 듯 세상이 조용해져 버린다면, 삶의 즐거움은 한없이 반감될 것이다. 아름다운 음악 소리, 사랑하는 사람의 목소리, 자연의 소리, 생활의 소리를 들을 수 있다는 것은 생활의 활력이자 기쁨이 된다. 소리를 듣게 해 주는 우리 몸의 소중한 기관인 '귀' 과연 소리는 어떻게 해서 들을 수 있고, 귀에 생길 수 있는 질환은 어떠한 것이 있을까? 또 소중한 귀의 건강을 지킬 수 있는 방법에는 어떠한 것들이 있는지 이번 호에서는 인체의 신비 귀에 대해서 울산의대 서울아산병원 이비인후과 이광선 교수와 충남대병원 이비인후과 박용호 교수의 도움말로 알아본다.