최대운동시의 호흡성 가스교환 및 환기기능

조용근 ( Yong Keun Cho ),정태훈 ( Tae Hoon Jung ) 대한결핵 및 호흡기학회 1995 Tuberculosis and Respiratory Diseases Vol.42 No.6

3차원 입체영상에서 시지각(時知覺) 요인의 상관관계

조용근(Yong Keun Cho) 한국만화애니메이션학회 2010 만화애니메이션연구 Vol.- No.19

인간이 외부세계를 지각하는데 70%이상을 의존하고 시각을 통한 지각경험은 3차원 입체 영상기술의 발전으로 실재감 재현의 주축이 되고 있으며 다양한 연구 분야의 접목을 통해 발전하고 있다. 3차원 입체지각 기술은 양안시차의 지각요인의 원리를 경험적 지각요인과 결합하여 실재감을 재현하는 기술로, 인간이 지닌 시각의 생리적 특징을 메카니즘으로 한 것이다. 하지만 인간의 지각요인은 생리적인 요인으로만 설명하기엔 부족함이 많다. 대상을 지각하는데 있어 일정하게 지각하는 것이 아니라 인간의 심리적인 요인이나 물리적인 상태에 따라 다양하게 인지된다는 특성이 있기 때문이다. 따라서 시지각 요인간의 상관관계가 3차원 입체지각에 영향을 미치는지를 프로토타입을 제작하여 검증하고자 한다. 특히 3차원 입체를 지각하는 경험적, 생리적 요인과 형태를 지각하는 물리적, 심리적 요인을 중심으로, 게슈탈트의 집단화 및 단순화 현상과 3차원 입체지각 간의 관계를 실험을 통해 살펴볼 것이다. 본 연구를 통해 3차원 입체의 지각특성을 을 일부 파악하고 이는 실재감 재현을 위한 3차원 입체 콘텐츠제작에 기초연구가 될 것으로 본다. Human beings experience the outside world through senses and have developed various ways of representation to preserve what they’ve experienced. The rapid progress of digital technology has opened a new era of representation technology, and furthermore, is functioning as a technology which offers new experiences. The sensory experiences through the sense of sight, which humans depend on more than 70% to perceive the outside world, have been becoming the center of representing the reality as the 3-D graphics technology has been growing, and developing by being grafted onto different areas of study. Various technologies to express the sense of reality, such as the technology to reinforce the virtual reality and to represent it in the reality, computer graphic, TUI technology, and five sensory technologies which apply humans’ senses, are making advancement based on humans’ visual features and sensory elements. In particular, the 3-D technology to display solidness provides not only representation but also new sensory experiences, and is emerging as the key technology to image contents. However, compared to the development of technology of 3-D graphics, there have been few basic studies on the principles of the sense of vision. Therefore, in this study, the principles and elements to sense videos will be examined. The sensory features of 3-D images to represent the sense of reality will be researched into, especially focusing on the experiential and physiological elements to sense 3-D structures, and the physical and psychological elements to sense shapes, which might be hopefully the basic study for producing 3-D contents.

비알코올 지방간질환의 선별검사, 진단 및 평가

조용근 ( Yong Keun Cho ) 대한간학회 2018 간학회 싱글토픽 심포지움 Vol.2018 No.2

The prevalence and incidence of non-alcoholic fatty liver disease(NAFLD) are rapidly increasing in South Korea. And thus, appropriate assessment of NAFLD is essential. Although the natural clinical course of simple steatosis is benign, some patients with steatohepatitis and fibrosis can further progress to have an advanced stage of liver disease. Liver biopsy is the gold standard for evaluation of NAFLD. However, the invasive procedure carries some morbidity and mortality risk. Therefore, the development of a reliably non-invasive method of evaluation is pertinent. To date, some biochemical parameters, panels, and transient elastography have been employed but these measures require further validation of their utility. This overview aims to summarize various options for the diagnosis and evaluation of NAFLD.

객혈 환자에서의 기관지동맥 색전술의 효과

조용근(Yong Keun Cho),김상훈(Sang Hoon Kim),김연재(Yeun Jae Kim),이영석(Yung Seuk Lee),이원식(Won Sik Lee),정태훈(Tae Hoon Jung),김용주(Yong Joo Kim) 대한내과학회 1991 대한내과학회지 Vol.40 No.2

N/A To evaluate the effectiveness of bronchial artery embolization (BAE) in control of massive or recurrent hemoptysis, a retrospective comparison study was made between 74 patients treated with BAE and 116 patients treated without BAE. The most frequent cause of hemoptysis was tuberculosis (67%)-43% active and 24% inactive, followed by bronchiectasis (20%). Immediate control of hemoptysis was achieved in 49 of 74 patients (66.2%) treated with BAE and 49 of 116 patients (42.2%) treated without BAE; the patients treated with BAE showed a higher success rate. The rebleeding rate was 69% in patients with BAE and 58% in patients without BAE, with no remarkable difference. The complications such as chest pain, voiding difficulty, fever, rash and paralysis of lower limbs were recovered. These facts suggest that the BAE is relatively safe and more useful in immediate control of massive hemoptysis.

고령화시대 노인의 경제활동에 관한 연구

이갑용 ( Kab-yong Lee ),송원호 ( Won-ho Song ),강장석 ( Jang-suk Kang ),이재희 ( Jae-hee Lee ),조용근 ( Yong-keun Cho ) 공주대학교 KNU 기업경영연구소 2010 기업경영리뷰 Vol.1 No.1

우리나라는 이미 2000년에 고령화 사회로 접어들었으며 2018년부터 심각한 고령사회가 되는 변화에도 불구하고 현행 경제. 사회 운영 틀을 그대로 유지할 경우 내수가 위축되거나 노동력부족 등으로 구조적침체가 발생할 가능성이 높다. 따라서 초 고령화 시대, 여러 가지 노인문제 중 노인들의 경제활동에 주안점을 두고 연구한 바 노인의 인구사회학적 특성과 경제활동 간에 밀접한 관련성이 있는 것으로 나타났으며 노인의 인구사회학적 특성 중에서 여자노인이고, 연령은 65세~69세, 교육수준은 무학인 노인층은 노인의 가구소득, 빈곤지위, 취업여부, 종사상지위와 높은 상관관계를 가진다는 것을 의미한다. 노인의 인구사회학적 특성은 경제활동 만족도에 따라 차이가 다르게 나타났으며 노인의 인구사회학적 특성 중에서 남자노인이고 교육수준은 2년제 대학의 노인층은 노인의 경제활동 만족도, 사회적 친분관계만족도, 전반적 만족도와 높은 상관관계를 가진다는 것으로 나타났다. 노인의 교육수준과 가구소득은 경제활동 만족도에 긍정적인 영향을 미치는 것으로 나타났으며 노인의 교육수준과 가구소득이 높은 노인들은 그렇지 않은 노인들보다 노인의 경제활동만족도, 사회적 친분관계만족도, 전반적 만족도가 모두 높게 인식하고 있다는 것을 의미한다. 이 연구결과를 국가 고령화 정책수립시 참고한다면 노인의 자립지원 및 Active Senior상 정립으로 노후 삶의 질을 향상하고 고용 및 산업구조를 고령사회 친화적으로 전환하여 신 성장 동력을 확보하고 삶의 질 향상을 위한 기반구축과 노후소득 보장체계를 강화하여 건강하고 보호받는 노후를 보장하는 복지국가 건설에 유용한 시사점을 제시해 줄 것으로 기대된다. Korea has already entered the aging society in 2000, but with current economic and social management, a structural stagnation such as decrease in domestic demand or lack of labor is expected to occur in 2018. The issues on old people of early aging era can be categorized into economic, healthy, leisure and social-psychologic conflicts and exclusion problems. Concentrating on economic issues, it was found that the population sociological features of old people are closely related to their economic activities and that amongst those features, for the group of old people of age between 65∼69 and illiteracy, the household income, poverty status, employment status and profession status are highly relevant to the economic activities. The population sociological features of old people were found to differ depending on the degree of satisfaction in economic activities, and amongst those features, for the group of old people of the male sex and literacy of 2-year university study, the degree of satisfaction in economic activities and social relationship, and overall degree of satisfaction are found to be highly relevant to the economic activities. The education level and household income was found to give a positive effect to the degree of satisfaction and this would mean that old people of high education level and household income highly recognize the degree of satisfaction in economic activities, social relationship and in overall. Referring to this result when establishing a policy, it is expected that better quality of life by independence of old people and definition of the active senior, the insurance of new motive power by conversion to senior-friendly structure for employment and industry, the base construction for better quality of life and reinforcement of insuring system for health and protection of the aged would be encountered and suggested.

관상동맥질환에서 운동부하 Tc - 99m Tetrofosmin 심근스캔의 진단적 유용성 : 운동부하심전도검사와의 비교

최지용(Ji Yong Choi),황진용(Jin Yong Hwang),황종현(Jong Hyeon Hwang),임현주(Hyeon Ju Lim),박헌식(Hun Sik Park),조용근(Yong Keun Cho),채성철(Shung Chull Chae),전재은(Jae Eun Jun),박의현(Wee Hyun Park),안병철(Byeong Cheol Ahn),이재태(J 대한내과학회 1997 대한내과학회지 Vol.53 No.6

N/A Objectives: Tetrofosmin is a new Tc-99m labeled myocardial perfusion imaging agent that shows slow clearance from the myocardium and rapid clearance from background organs. The purpose of this study was to assess the ability of exercise Tc-99m tetrofosmin single photon emission computed tomography(SPECT) to identify and localize coronary artery disease. Methods : The study population consists of 49 patients with suspected coronary artery disease who underwent both exercise Tc-99m tetrofosmin SPECT and coronary angiography within 2 weeks. Using the one day imaging protocol, 7-10mCi of Tc-99m tetrofosmin was injected at rest and 4 hours later, 25 mCi of Tc-99m tetrofosmin was injected at peak exercise. Results: The sensitivity and specificity of exercise Tc-99m tetrofosmin SPECT was 94.9% and 60% for detection of coronary artery disease with luminal narrowing more than 50%, and 96.4% and 33.3% for detection of coronary artery disease with luminal narrowing more than 70%. The sensitivity of exercise Tc-99m tetrofosmin SPECT for detection of individual stenosed vessels(≥50% and ≥70% coronary stenosis) was 79.2%, 100% for LAD, 55.6%, 55.6% for LCx and 85.0%, 92.9% for RCA and the specificity was 88.0%, 75.0% for LAD, 100%, 87.5% for LCx, 86.2%, 77.1% for RCA respectively. Conclusion: Exercise Tc-99m tetrofosmin SPECT appears to be an feasible and useful noninvasive test for the diagnosis of coronary artery disease

내시경적 배액술로 치료한 간위루가 합병된 아메바성 간농양1예

고성준 ( Sung Jun Goh ),조용근 ( Yong Keun Cho ),박민규 ( Min Gyu Park ),이동엽 ( Dong Yup Lee ),서용우 ( Yong Woo Seo ),장미영 ( Mi Young Jang ),정금모 ( Gum Mo Jung ),조진웅 ( Jin Woong Cho ) 전북대학교 의과학연구소 2011 全北醫大論文集 Vol.35 No.2

Amebiasis is caused by the protozoan Entamoeba histolytica. Worldwide, approximately 40 to 50 milion people are infected annually. Most infections are asymptomatic, but amebic dysentery, amebic liver abscess, and rarely pulmonary, cardiac or brain involvement can occur4. amebic liver abscess (ALA) is the most common extraintestinal manifestation of amebiasis. The most common complication of ALA is rupture into adjacent structures; the frequent sites of ALA rupture are pleuropulmonary (72%), subphrenic space (4%), and peritoneal cavity (10%). The rupture into stomach is extremely rare. To date, there have been only six case reports. the management of ALA rupture is controversial. In general, surgical treatment is recommended. We report here a case of ALA with hepatogastric fistula, which was successfully managed by endoscopic drainage and antibiotics.

삼각 섬유성 연골(TFCC) 손상 환자의 자기공명영상 검사 시 Fat Suppressed 3D FSPGR T1 강조 기법에 대한 Fat Suppressed Isotropic 3D FSE T1 강조 기법의 비교 분석 및 유용성에 관한 평가

강성진(Sung-Jin Kang),조용근(Yong-Keun Cho),이성수(Sung-Soo Lee) 한국자기학회 2016 韓國磁氣學會誌 Vol.26 No.3

In this study, For assessment of triangular fibrocartilage complex (TFCC) injury, we acquired images by fat suppressed 3D fast spoiled gradient recalled T1 and fat suppressed Isotropic 3D fast spin echo T1 techniques. For quantitative evaluation, measured signal to noise ratio and contrast to noise ratio and verified statistical significance between two imaging techniques by Mann-Whitney U verification. And for qualitative evaluation, marked 4-grade scoring (0: non diagnostic, 1: poor, 2: adequate, 3: good) on shape of TFCC, artifacts by partial volumes, description of the lesions by two radiologist, verified coincidence between 2 observer using Kappa-value verification. We used 3.0 Tesla MR equipment and 8-channel RF coil for imaging acquisition. As quantitative evaluation results, signal to noise ratio and contrast to noise ratio value of Isotropic 3D fast spin echo T1 technique is higher in every image sections, also between two imaging techniques by Mann-Whitney U verification was statistically significant (p < 0.05). As qualitative results, observer 1, 2 marked a higher grade on Isotropic 3D FSE T1 technique, coincidence verification of evaluation results between two observers by Kappa-value verification was statistically significant (p < 0.05). As a result, during MRI examination on TFCC injury, fat suppressed Isotropic 3D fast spin echo T1 technique is considered offering more useful information about abnormal lesion of TFCC.

위에 발생한 사구종양 1예

박민규 ( Min Gyu Park ),조용근 ( Yong Keun Cho ),고성준 ( Sung Jun Goh ),서용우 ( Yong Woo Seo ),이동엽 ( Dong Yup Lee ),장미영 ( Mi Young Jang ),정금모 ( Gum Mo Jung ) 전북대학교 의과학연구소 2011 全北醫大論文集 Vol.35 No.2

사구종양은 진피나 피하조직에서 흔하게 발생하지만 위에서는 드물에 발생하는 종양으로 현재까지 국내에서 약 15예 정도가 보고되었다. 52세 여자환자가 우연히 위에서 점막하 종양이 발견되었다. 내시경 초음파상 위벽 3번째 그리고 4번째 층에서 1.8 ×1.7cm 의 경계가 명확하고 균질한 저에코 종양으로 관찰되었다. 복부 CT에서 종양은 동맥기의 간문맥과 동일한 정도로 강한 조영 증강 소견을 보였으며, 이러한 조영 증강이 문맥기까지 지속되었다. 조직학적 확진 및 치료를 위해 내시경적 점막하 박리절제술을 시도하였으나 주위 조직과의 유착으로 실패하였고 복강경을 이용한 쐐기절제술을 시행하였다. 면역조직화학염색에서 사구종양으로 진단되었다. 이에 본 저자들은 비교적드문 질환인 위에 발생한 사구종양을 진단하고 치료하였기에 보고하는 바이다. Glomus tumors are commonly observed in the dermis or subcutis but are only rarely found in the stomach, A 52-year-old woman presented with an incidental finding of a submucosal tumor in the stomach. Endoscopic ultrasonography (EUS) showed a 1.8 × 1.7 sized well-circumscribed homogemous hypoechoic tumor in the 3rd and 4th layer of the gastric wall. Contrast-enhanced abdominal computerized tomography (CT) demonstrated high enhancement of the tumor with the same level of enhancement as the portal vein for the arterial phase, with persistence of enhancement in the portal phase. For histologic confirmation and treatment, endoscopic enucleation was attempted but failed due to fibrotic adhesion with the surronding tissue. So laparoscopic wedge resections were performed. Histological and immunochemical analysis of the tumor cells were compatible with glomus tumors. Up to recently, about 15 cases of glomus tomor in the stomach was reported in Korea. We report here a case of glomus tumor in the stomach, which was experience for diagnosis and treatment in our hospital.

비수술적 요법으로 치료한 십이지장 궤양 천공 1예

김국민 ( Kook Min Kim ),조용근 ( Yong Keun Cho ),황유정 ( Yu Jeong Whang ),오수진 ( Su Jin Oh ),홍윤경 ( Yun Kyung Hong ),나영균 ( Yong Gyun Na ),강선미 ( Seon Mi Kang ),김인희 ( In Hee Kim ),김상욱 ( Sang Wook Kim ),이수택 ( Soo 전북대학교 의과학연구소 2006 全北醫大論文集 Vol.30 No.1

소화성 궤양에서 천공은 심각한 합병증 중 하나로써 적절한 치료를 받지 않을 경우 사망할 수 있다. 이에 대한 치료 방법으로 현재까지 수술적 치료가 주된 방법이지만 선택된 천공 병변에서 비수술적 치료를 시행하여도 효과적이다. 저자들은 산부인과 수술 후 발생한 자발성 십이지장 궤양 천공환자에서 비수술적 요법으로 유지 후 효과적으로 치료된 예가 있어서 문헌고찰과 함께 보고한다. The ulcer perforation is a major complication of peptic ulcer disease. Surgical repair is the standard treatment of patients with perforated peptic ulcer. However, nonoperative management was indicated in patient without the clinical sign of peritoneal inflammation because perforated peptic ulcers are frequently sealed spontaneously by omentum or adjacent organ. We report a case of perforated duodenal ulcer in a 42-year-old woman who was successfully treated with nonoperative management.