CT flouroscopy를 이용한 중재적 시술의 유용성

전혜정,박정희,서보경,박상우,신현준,최영철,한혜승,이창희 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Conventional CT-guided needle localization has been reported many times, but a few reports of interventional procedures by using multidetector CT scan with CT-fluoroscopy have been described. We presented 36 cases of CT-fluoroscopy guided interventional procedures focusing on the puncture technique. Two cases of small pneumothorax and one case of pulmonary hemorrhage out of 2lcases after lung biopsy, were not needed any treatments We can easily and accurately access to the lesion by using CT-fluoroscopy and unique our marker system.

치과용 아말감의 압축 및 인장강도에 관한 연구

김철위,전혜림,허준호 大韓齒科器材學會 1990 대한치과재료학회지 Vol.17 No.2

The purpose of this study was to evaluate the compressive and tensile strength of representative five commercially available dental amalgams (DA, HA, HV, UT and HA-21) used in Korea. The specimens were prepared in 4.0 ×8.0 mm. stainless steel cylindrical molds and the prepared specimens were stored in 37 ±1℃ and 100% relative humidity conditions. The compressive and tensile strength tests were determined in the Instron Universal Testing Instruments and the compressive measurements were made at the end of one-hour, using a cross-head speed of 0.25mm/min, and the tensile strength measurements were made at 15 minutes, 1 hour, 24 hours and 7 days, using a cross-head speed of 0.05 mm/min. These tests were performed by the methods of KDA specification No. 4, ISO specification No. 1549, and ANSI/ADA specification No. 1. The results obtained in this study were as follows: 1. The results show that the compressive strength at one-hour of the high-copper amalgams (HA-21) was higher than that of the others, and the conventional HA, HV, and UT amalgams considerable no difference according to the products. 2. The diametral tensile strength of the conventional amalgams were considerably higher than the high-copper amalgams, the initial tensile strength at 15 minutes were increased in HA and HA-21 amalgams, and the final tensile strength of DA and HA amalgams were higher than that of the others.

n-CdS_(0.46)Se_(0.54)/p-Cu_92-x)S_(0.46)Se_(0.54) 이종접합 태양전지의 제작과 그 특성에 관한 연구

유상하,최승평,이상열,홍광준,서상석,김혜숙,전승룡,윤은희,문종대,신영진,정태수,신현길,김택성,유기수 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-

승화방법에 의해 CdS_0.46Se_0.54 단결정을 성장하여 결정구조를 조사하고, Van der Pauw 방법으로 Hall effect를 측정하여 carrier density의 온도 의존성과 mobility의 온도 의존성을 조사하였다. 성장된 CdS_0.46Se_0.54 단결정을 치환반응하여 n-CdS_0.46Se_0.54/p-Cu_2-xS_0.46Se_0.54 이종접합 태양전지를 제작하였다. Spectral response, 전류-전압특성 및 전력변환 효율을 조사하여 그 결과로부터 개방전압은 0.48V, 단락 전류 밀도는 21mA/㎠, fill factor와 전력변환효율은 각각 0.75와 9.5%를 얻었다. CdS_0.46Se_0.54 single crystal was grown by a sublimation method. The crystal structure and the temperature dependence of carrier density and mobility of CdS_0.46Se_0.54 single crystal were studied. Heterojunction solar cells on n-CdS_0.46Se_0.54/p-Cu_2-xS_0.46Se_0.54 were fabricated by the substitution reaction. The spectral response, the J-U characteristics and the conversion efficiency of the n-CdS_0.46Se_0.54/p-Cu_2-xS_0.46Se_0.54 heterojunction solar cells were studied. The open-cricuit voltage, short-circuit density, fill factor and conversion efficiency of n-CdS_0.46Se_0.54/p-Cu_2-xS_0.46Se_0.54 heterojunction solar cells under 80mW/㎠ illumination were found to be 0.48V, 21mA/㎠, 0.75 and 9.5%, respectively.

C.V.D. 방법에 의한 Cd_0.78Zn_0.22 S박막 성장과 광전기적 특성연구

유상하,이상렬,홍광준,서상석,김혜숙,전승룡,윤은희,문종대 조선대학교 기초과학연구소 1993 自然科學硏究 Vol.16 No.1

We had grown Cd_0.78Zn_0.22S polycrystal thin films on slide substrate using chemical vapour deposition(CVD) method. We measured X-ray diffraction patterns in order to study Cd_0.78Zn_0.22S polycrystal structure. We studied its band gap using transmission curves and photocurrent and also analyzed photoluminescence using configurational coordinate model. We measured Hall effect·on this sample by Van der Pauw method and studied on carrier density and mobility depending on temperature.

Characteristics of Korean Employees Without Depression but Having Suicidal Ideation

Jeon Hye Jeong,Oh Kang Seob,Shin Young-Chul,Shin Dong-Won,Cho Sung Joon,Jeon Sang Won 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.7

Objective The aim of this study was to identify the factors related to suicidal ideation targeting the risk group showing suicidal ideation despite the absence of depression in Korean workers.Methods The data of 14,425 participants who were employees aged of 18 to 75 years who attended a mental health checkup program at the Workplace Mental Health Institute, Kangbuk Samsung Hospital from June 2015 to October 2019 were analyzed. A self-report questionnaire consisting of sociodemographic factors, suicidal ideation, job stress, levels of depression and anxiety, and resilience was administered. A Hierarchical logistic regression model was used with suicidal ideation as dependent variable. Separate analyses were conducted according to depressive symptoms using the 20-item Center for Epidemiological Studies Depression (CES-D) scale.Results Being women, older, and having low resilience, more perceived stress, more severe anxiety and less sleeping hours were associated with suicidal ideation in no-depression group (CES-D <16). In the subcategories of job stress, lack of reward was significantly associated with suicidal ideation in no-depression group.Conclusion This study identified the characteristics of a group that has no depression but has suicidal ideation in Korean workers. Among job stress items, lack of reward is a clear characteristic to be considered with caution in this group.

Quantitative Vertebral Bone Density Seen on Chest CT in Chronic Obstructive Pulmonary Disease Patients: Association with Mortality in the Korean Obstructive Lung Disease Cohort

Hwang Hye Jeon,이상민,Seo Joon Beom,Kim Ji-Eun,Choi Hye Young,Kim Namkug,Lee Jae Seung,Lee Sei Won,Oh Yeon-Mok 대한영상의학회 2020 Korean Journal of Radiology Vol.21 No.7

Objective: Patients with chronic obstructive pulmonary disease (COPD) are known to be at risk of osteoporosis. The purpose of this study was to evaluate the association between thoracic vertebral bone density measured on chest CT (DThorax) and clinical variables, including survival, in patients with COPD. Materials and Methods: A total of 322 patients with COPD were selected from the Korean Obstructive Lung Disease (KOLD) cohort. DThorax was measured by averaging the CT values of three consecutive vertebral bodies at the level of the left main coronary artery with a round region of interest as large as possible within the anterior column of each vertebral body using an in-house software. Associations between DThorax and clinical variables, including survival, pulmonary function test (PFT) results, and CT densitometry, were evaluated. Results: The median follow-up time was 7.3 years (range: 0.1–12.4 years). Fifty-six patients (17.4%) died. DThroax differed significantly between the different Global Initiative for Chronic Obstructive Lung Disease stages. DThroax correlated positively with body mass index (BMI), some PFT results, and the six-minute walk distance, and correlated negatively with the emphysema index (EI) (all p < 0.05). In the univariate Cox analysis, older age (hazard ratio [HR], 3.617; 95% confidence interval [CI], 2.119–6.173, p < 0.001), lower BMI (HR, 3.589; 95% CI, 2.122–6.071, p < 0.001), lower forced expiratory volume in one second (FEV1) (HR, 2.975; 95% CI, 1.682–5.262, p < 0.001), lower diffusing capacity of the lung for carbon monoxide corrected with hemoglobin (DLCO) (HR, 4.595; 95% CI, 2.665–7.924, p < 0.001), higher EI (HR, 3.722; 95% CI, 2.192–6.319, p < 0.001), presence of vertebral fractures (HR, 2.062; 95% CI, 1.154–3.683, p = 0.015), and lower DThorax (HR, 2.773; 95% CI, 1.620–4.746, p < 0.001) were significantly associated with all-cause mortality and lung-related mortality. In the multivariate Cox analysis, lower DThorax (HR, 1.957; 95% CI, 1.075–3.563, p = 0.028) along with older age, lower BMI, lower FEV1, and lower DLCO were independent predictors of all-cause mortality. Conclusion: The thoracic vertebral bone density measured on chest CT demonstrated significant associations with the patients’ mortality and clinical variables of disease severity in the COPD patients included in KOLD cohort.

OCT 광학기기의 레진 컴파짓 수복평가의 응용

Sang Mi Jeon,Young Hee Lee,Hyeong Joon Ji,Hye Joung Cho,Seo Jin Kim,Hye Eun Kim,SUN QIAOCHU,Kyu Hyeon Ahn,Hong Ran Choi,Ok Joon Kim 대한구강악안면병리학회 2016 대한구강악안면병리학회지 Vol.40 No.4

Composite resins are developed as restorative materials to improve esthetics and mechanical properties. To improve the physical properties of resin material, resin filler have to be added. However, no imaging method is adopted for resin filler distribution. Optical coherence tomography (OCT) is a optical imaging technique to delineate microscopic structures within biological tissue. The OCT application to dental composites resin and its filler is not described yet. So, this new and advanced optical method is needed for clinical application for evaluation of dental composite resin. To analyze the spatial distribution of dental composite resin and to evaluate the resin restoration in cavity, frequency domain optical coherence tomography (FD-OCT) was used for their analysis. Resin restored tooth was prepared. For morphological observation, serially sectioned teeth, conventional X-ray taking and micro computed-tomography (CT) images were compared with OCT images. The experiment has done to evaluate the success of the resin restoration using 3 dimensional structure OCT image. In this research, OCT is evaluated as a new technique to image resin restoration. The evaluation of resin restored tooth was performed by OCT. Inappropriate restoration such as marginal adaptation, large porosities, internal integrity and poor contour could be detected. Resin filler also could be checked by OCT. The distribution, number, regularity and size of resin filler can be differentiated from several commercial products. Considering the characteristics of the OCT, it can be used to evaluate the defects of resin restoration, resin filler distribution, and internal integrity between resin material and tooth structure. The OCT can be considered to be a new and advanced method for the evaluation of resin restorations.

The Effects of Interferential Current Therapy on Functional Dyspepsia

Ja Pung Koo,Hee Joon Shin,Nyeon Jun Kim,Hye Mi Jeon,Joo Hyun Park,Young Dae Yun,Joon Hee Lee,Sang Wan Lim,Ki Mai Um,Ji Sung Kim 국제물리치료학회 2013 Journal of International Academy of Physical Ther Vol.4 No.1

This study aims to address the effect of interferential current therapy and thereby to provide basic resources to physical therapies for internal medicine by identifying symptoms for functional dyspepsia and serum gastrin level that shows gastric motility. Following results were obtained by performing interferential current therapy to 16 subjects composed of 8 for functional dyspepsia group and 8 for control group for 20 minutes a day, 3 days a week, for 6 weeks. In control group, serum gastrin level was significantly( p<.01), lowered after the therapy whereas there was no significant difference observed in all questions from questionnaire for symptoms of functional dyspepsia between before and after the therapy. In functional dyspepsia group, serum gastrin level was significantly(p<.01), lowered after the therapy and there was also significant(p<.01) reduction in every question from questionnaire for symptoms of functional dyspepsia between before and after the therapy. There was more significant decrease in serum gastrin level and reduction in questionnaire for symptoms of functional dyspepsia in the functional dyspepsia group compared to the control group(p<.01). This study confirms the interferential current therapy as an effective therapeutic method for internal diseases including functional dyspepsia since it not only improves the symptoms of functional dyspepsia but also allows the gastric motility close to normal.

Bisacodyl Induced Severe Rectal Ulcer with Proctitis

Hye Jin Cho,Jae Uk Shin,Su Sin Jin,Hyeon Jeong Kang,Ho Wook Jeon,Joon Yub Lee 이화여자대학교 의과학연구소 2017 EMJ (Ewha medical journal) Vol.40 No.1

Constipation is a prevalent, often chronic, gastrointestinal motility disorder. Bisacodyl, a stimulant laxative, is widely used to treat constipation in adults and children. This drug is usually safe, but it has some side effects including diarrhea, abdominal pain, colitis, and proctitis. There have been reports that rectal administration of bisacodyl could cause injury to the rectal mucosa by mechanical and chemical mechanisms. However, there has been no report of severe proctitis with rectal ulcers in patients taking oral bisacodyl. In this report, we describe the case of an 80-year-old woman with severe rectal ulcers and proctitis after taking oral bisacodyl for several days, and review the literature.

Case Reports : Fatal spontaneous utero-ovarian vessel rupture during pregnancy in a patient with endometriosis

Hye Jun Lee,Joon Seok Hong,Eun Seon Im,Yong Tak Jeon,Kyo Hoon Park 대한산부인과학회 2009 Journal of Womens Medicine Vol.2 No.3

To report the fatal outcome of hemoperitoneum caused by spontaneous utero-ovarian vein rupture during pregnancy in a patient with endometriosis (ES). A 33-year-old patient with a prior history of endometriosis developed spontaneous left utero-ovarian vein rupture accompanied by fetal death in utero at 32 weeks gestation. Despite surviving hypovolemic shock, systemic inflammatory response syndrome due to hypoxia-reperfusion injury in multiple organs eventually led to maternal death. Obstetricians must be aware of the possibility of spontaneous utero-ovarian vein rupture, especially if a pregnant woman with endometriosis presents with symptoms of hemoperitoneum.