X선에 노출된 보리의 생장과 엽록소 측정

이원정(Won-Jeong Lee),이모권(Mo-Kwon Lee),이중록(Lee Jung Rok),김하늘(Kim Ha Neul),유세종(Se-Jong Yoo),이배원(Bae-Won Lee),정순철(Sun-Cheol Jeong) 대한방사선과학회(구 대한방사선기술학회) 2021 방사선기술과학 Vol.44 No.3

The purpose of this study is to measure of growth and chlorophyl in barley exposed by X-ray. Barley seed was soaked 24h duration in water, then was classified into two group; pre-seed germination group (Pre-G) or post-seed germination group (Post-G). Also, divided as control subgroup and experimental subgroup(10Gy, 20Gy, 30Gy) in each group. Experimental subgroups were exposed by X-ray using linear accelerator (Clinac IS, VERIAN, USA). Expose condition was 6 MV X-ray, SSD 100 cm, 18×10 cm, 600 MU/min. Length was measured every day for 10 days and 10th day for weight. Chlorophyl was analyzed using spectrophotometer(uv-1800, shimadzu, japan) in l0th day. Data analysis was performed using SPSS ver 22.0(Chicago, IL, USA), ANOVA test (Dunnett_T3) between control subgroup and experimental subgroup in group and Independent T-test between Pre-G and Post-G in subgroup. In Pre-G, length of barley was significantly difference between control and 30Gy in 4th day (4.3 vs. 1.5, p= 0.011). Length of 30Gy was statistical difference with control(10th day; 14.4 vs. 6.3, p < 0.01), and was not in 10Gy or 20Gy in all day. In experimental subgroup, length was shorter as increasing radiation dose. In Post-G, length of barley was not difference statistically between control and experimental subgroup in first day, but more difference between two subgroup with increasing duration after exposing. Length of experimental subgroup was shorter significantly compared with control in 10th day, and no significant difference between experimental subgroup. Density of chlorophyl was increasing with increasing radiation dose in Pre-G and Post-G. Chlorophyl density of control was lower than 30Gy; 0.26ppm in Pre-G, 0.29ppm in Post-G). Growth and chlorophyl of barley was effected by X-ray. It is expected to be used as basic data for future radiobiological research.

접촉성 감염환자 흉부검사 시 의료관련감염 예방에 대한 연구

이상원(Sang-Won Lee),김동진(Dong-Jin Kim),이배원(Bae-Won Lee) 대한방사선과학회(구 대한방사선기술학회) 2018 방사선기술과학 Vol.41 No.4

This study proposes measures and methods to reduce healthcare associated infections by comparing and analyzing the bacterial contamination level before and after putting on personal protective equipment (PPE) on the test equip-ment and the contact infected patients getting chest PA projections. Among the 50 inpatients who were diagnosed with C. difficile, MRSA, and VRE, 28 patients who were instructed to undergo chest PA projection and follow-up were chosen, The 3 parts that come in contact with the detector, chin, chest, and hands, were designated for all, and the bacterial contamination level before and after disinfection and before and after putting PPE was determined. Statistical analysis was performed using Medcalc version 14, and quantitative analysis was performed using paired student t-test, with statistical significance being noted at p<0.05. Results for the comparison of the mean values before and after disinfection of the detector, chin (3.000), chest (2.000), and hands (3.430), showed that the number of bacteria after disinfection was lower than it was before disinfection. Analyzing for each part before and after disinfection, there were statistically significant differences for the chin, chest, and hands (p<0.01). Results for the comparison of the mean values before and after putting on PPE, chin (2.202), chest (2.140), and hands (4.213), showed that the number of bacteria after putting on PPE was lower than it was before putting on PPE. Analyzing for each part before and after putting on PPE, there were statistically significant differences for the chin, chest, and hands (p<0.03). As a result, it was confirmed that the number of bacteria after putting on PPE was lower than it was before putting it on. In the future, expanding the research scope for contact infected patients will establish standards for quarantine guidelines depending on the way it spreads, and contribute to the prevention of healthcare associated infections.

요로결석 위치 진단에 대한 복부자세 변화에 따른 연구

김동진(Dong-Jin Kim),채종상(Jong-Sang Chae),유채민(Chae-Min Yoo),이배원(Bae-Won Lee) 대한방사선과학회(구 대한방사선기술학회) 2018 방사선기술과학 Vol.41 No.1

Patients who visit the emergency room with urinary stones have difficulty lying down in a supine position due to severe pain when performing the KUB test. The purpose of this study was to find methods to reduce the patients pain and image distortion, and obtain medical images with high diagnostic values. After checking the standard classification of disease and cause of death, the target group consisted of 121 patients who had clearly distinguished stones from computed tomography. Patients with stones in the ureteralvesical junction were excluded. Qualitative image evaluation was performed by confirming the location of the stone in the computed tomography images. and evaluated the rate of visual discrimination of stones possible through KUB and abdominal plain X-ray. Quantitative image evaluation was performed on the KUB, abdominal plain X-ray images. The transverse process of the first lumbar vertebrae served as the standard point, and the length from this point to the lower part of the stone was measured. Results from looking at the rate of visual discrimination of stones possible through KUB and abdominal plain X-ray showed: 94 patients (77.6%) for KUB images and 91 patients (75.2%) for computed tomography images. The standard deviation for KUB and abdominal X-ray was 3 (2.4%). Comparing and analyzing the location from KUB images and abdominal plain X-ray images, the stone position was 10.1 mm in the kidney, 10.5 mm in the ureteropelvic junction, and 9.7 mm in the ureters. It was shown that the stone moved 10 mm on average with significant statistical difference (P<0.05). In cases where the pain is so severe that it is impossible to perform the test in the supine position, an alternative may be to check the stone position by performing a modified KUB test by having the patient stand in a vertical position. In the future, this will provide convenience to both the examiner and the patient when performing the examination, and it will contribute with its reproducibility.

고령화에 따른 구강건강이 삶의 질에 미치는 영향 -한국거주 노인과 미국거주 노인을 대상으로-

김영순 ( Young Soon Kim ),신경희 ( Kyoung Hee Shin ),정순희 ( Soon Hee Chung ),김연선 ( Yeon Sun Kim ),이배원 ( Bae Won Lee ),김윤신 ( Yoon Shin Kim ) 대한보건협회 2014 대한보건연구 Vol.40 No.1

연구목적 : 본 연구의 목적은 미국거주 노인과 한국 거주 노인의 삶의 질과 관련요인을 비교하고 삶의 질에 영향을 주는 요인을 규명하여, 우리나라 특성에 맞는 삶의 질을 향상시키는 중재프로그램 개발에 기초 자료로 제공하기 위함이다. 연구방법 : 미국에서 거주한 20년 이상의 한인 65세 이상 60명과, 한국거주 65세 이상 198명을 대상으로 하였다. 자발적 참여 동의한 분들을 대상으로 개별 면접조사 방법으로 조사 분석하였다. 연구결과 : 노인의 구강건강이 삶의 질에 미치는 영향은 경제수준에서 한국보다 미국에 거주하는 노인들이 더 높게 나타났으나 통계적 차이는 없었으나, 의료보장(t=-2.788, p<0.01), 치과처치도(t=-3.545, p<0.01), 예방교육(t=-4.807, p<0.01)은 한국거주 노인들이 더 높았다. 한국은 R2 0.512으로 회귀모형이 51.2%의 설명력을 보였으며, 미국의 경우 R2 0.523으로 52.3%의 설명력을 가지고 있었다. 결론 : 고령화에 접어든 노인의 삶의 질을 향상시키기 위한 프로그램 개발이 고려되어야 할 것으로 사료된다. Objectives: This study is aimed to provide basic data for the development of a decent intervention program which can enhance the quality of life customized to the circumstances of Korea after comparing quality-of-life factors between the aged in the U.S. and Korea and analyzing the matters which have an effect of their quality Methods: A personal interview has been performed against the following volunteer respondents; 60 Korean elderly people (aged 65 or older) who have been living in the U.S. for over two (2) decades, 198 senior citizens (65 or older) in Korea. Results: In terms of the effect of oral health on the quality of life, those living the U.S. were higher than Korean elderly people without statistical difference. In terms of medical security (t=-2.788, p<0.01), dental treatment (t=-3.545, p<0.01) and preventive education (t=-4.807, p<0.01), the elderly living Korea were higher. In terms of the R2 of regression, Korea was 0.512 (51.2%) while the U.S. was 0.523 (52.3%). Conclusion: It appears that it is necessary to develop a program which can improve seniors` quality of life.