분지 혈관 Model에서 MRI 신호 변화에 미치는 영향

여진동 ( Jin Dong Yeo ),전병규 ( Byeong Kyu Jeon ),고인호 ( In Ho Ko ) 한국위생과학회 2009 한국위생과학회지 Vol.15 No.2

순환골재가 함유된 철근콘크리트보 휨거동의 고찰

여진동(Yeo Jin-Dong),박태희(Park Tae-Hee),김우석(Kim Woo-Suk),강현구(Kang Thomas H.-K.),홍성걸(Hong Sung-Gul),곽윤근(Kwak Yoon-Keun) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.9

Developed society is beginning to face an environmental crisis in that enormous quantities of demolished concrete are both damaging to the environment and wasteful to the economy. Conversely, most of the waste concrete can be one of the largest market values by recycling. The problem is that the demolished concrete is currently not recycled economically and efficiently, and is used worthlessly for landfill or road basement. In many cases, the demolished concrete remains as just waste concrete, which can cause a serious environmental problem. Up to now, the Korean architectural and civil engineering society has barely found the value of the recycled concrete that can be matched with that of high performance concrete, both of which are especially useful for the mega construction site. The result from this recycled concrete study is very important in these aspects. The RCA (recycled concrete aggregate) must be researched more in terms of mechanical properties and structural performance. The moment strength, cracking and steel yielding processes and failure mode are investigated for varying steel ratios and percentage of RCA. The normal strength concrete with a 24 MPa compressive strength is used. In recycled concrete aggregate (RCA), the compressive strength is particularly important, because the RCA requires more water than NCA (normal concrete aggregate) so that a lower strength can be produced. Therefore, more efforts are needed to gain the design strength. This experiment investigates the flexural performance and suggests the possible application of RCA for building structures. Furthermore, this research will play an important role toward the establishment of the structural design standard for recycled concrete.

정량적 전산화 단층촬영법을 이용한 척추 골밀도 측정

여진동,박재성,Yeo, Jin-Dong,Park, Jae-Seong 보건의료산업학회 2009 보건의료산업학회지 Vol.3 No.2

The purpose of this study is to evaluate the relationship between osteoporotic postmenopausal women and its bone mineral density value by using the single energy quantitative CT. 1. Decreasing BMD with age is evident. There is a significant low BMD value in the osteoporotic women compared with the healthy subgroup. 2. BMD decrease from T12 to L4, except in healthy premenopausal women. 3. Relationship of spinal BMD expressed as average BMD of T12 through L4 Show strong correlation with mean BMD in all vertebral levels. 4. There are significantly different BMD value from T12 through L4 in subgroup 1, 2, 3 but there is no statistically significant difference between subgroup 2 and 3. Conclusion, There is a significant decreasing BMD with age but it is difficult to differentiate postmenopausal relatively healthy women from osteoporotic women by BMD.

재 촬영 필름 감소방안

여진동,김차곤,오문영,yeo jin dong,kim cha kon,oh moon young 대한방사선사협회 2003 대한방사선사협회지 Vol.29 No.1

This study was performed To investigate radiographic repeat rate on QI factors and to compare numbers of repeat film according to eachyear radiogical technologist. I wanted to make basic data to use QI programs in department of diagnostic radiology, This

치과병원에 내원한 환자의 방사선피폭 인지도에 관한 연구

여진동 ( Jin-dong Yeo ),고인호 ( In-ho Ko ) 한국방사선학회 2018 한국방사선학회 논문지 Vol.12 No.2

본 연구는 치과병원에 내원 환자를 대상으로 방사선 검사 시 방사선피폭 인지도에 대한 관련요인을 분석하여 방사선피폭 인식의 변화를 위한 교육 자료를 만드는데 기초자료를 제공하기 위해 시도하였다. 방사선 장치 중 가장 방사선 피폭을 가장 많이 받는 검사에 대해서는 전체 65.5%로 CT가 가장 높았으며, 방사선 검사 시 피폭에 가장 민감한 부위에 대해서는 생식선 56.1% 가장 많았고, 방사선에 대한 정보 파악은 전체 26.3%가 TV나 신문을 통해 습득하는 것이 가장 많았다. 방사선 인식도, 방사선 유해성, 방사선 검사 시 심리상태, 방사선 피폭방지, 방사선 필요성에 대해서는 성 별간 남자가 더 높게 나타났으며, 통계학적으로는 유의한 차이가 있었다. 본 연구를 통해서 환자들로 하여금 방사선피폭에 대하여 올바르게 인식을 할 수 있도록 교육프로그램의 개발이 시급하며, 방사선사들에게는 환자의 피폭선량을 경감을 위한 세심한 배려가 필요하다고 하겠다. 또한 환자들은 방사선에 대해서 올바르게 인식하는 것이 촬영 시 불안감과 방사선피폭을 줄일 수 있을 것이다. The purpose of this study was to investigate factors of perception by inpatients of the Dental Hospital institutions about exposure to radioactivity at the time of radioactive examination, providing basic information for making educational materials aimed to change their perception. Most of those patients, 65.5.0% responded that CT was a type of radioactive examination bringing highest exposure to radiosensitivity. Most of the subjects, 56.1% said that a body part most vulnerable to exposure to radiosensitivity was the genital gland at the time of radiosensitivity examination. And most of the participants, or 26.3% responded that they obtained information about radiation from TVs or newspapers. Among the surveyed patients, men were higher in scores for factors of the perception of radiation such as recognition of radiation, harmfulness of radiation, psychological state at the time of radioactive examination, prevention of exposure to radioactivity and necessity of radiation that women were, with statistically significant differences between the two groups. These findings suggest that it is urgently needed to develop an education program which helps patients better perceive exposure to radioactivity and that radiologists should be very careful to reduce the does of that exposure. If patients better perceive radiation, they would be less anxious and less exposed to radioactivity when receiving the radioactive examination.

방사선과 대학생이 지각한 방사선사 이미지와 자아존중감에 관한 연구

여진동,전병규,Yeo, Jin-Dong,Jeon, Byeong-Kyu 대한디지털의료영상학회 2014 대한디지털의료영상학회논문지 Vol.16 No.1

For this study, this researcher conducted a questionnaire survey of college students as juniors who were majoring in radiology at universities located in Daegu and Gyeongbuk. The distribution and collection of the questionnaire copies were made from April 2nd to 30th, 2013 when the researcher explained the purpose of this study to those students and asked them to fill in the documents. Out of the distributed coies, 220 were finally collected and analyzed. The findings of this study can be summarized as follows. 1. Concerning conventional images of the radiological technologists, the male college students of radiology were most affirmative about 'being rational and logical' and 'doing business with putting patients first' while, the female ones of the same major, 'being accurate in doing business' and 'being reliable'. 2. Regarding social images of the radiological technologists. the male college students of radiology were most affirmative about 'being highly intellectual' while, the female ones of the same major, 'being attractive in profession'. 3. In terms of professional images of the radiologist, the college students, irrespective of gender, were most affirmative about 'having highly professional skills' and 'having expertise'. 4. In relation to personal images of the radiologist, both the male and female college students of radiology were most affirmative about 'being kind', but most negative about 'being egocentric'. 5. The radiology students' perceived images of the radiological technologists, and their self-esteem were statistically, significantly correlated with each other. Among those images, conventional ones were found most correlated with self-esteem.

7) 진단방사선과 방사선사 업무실태에 관한 연구

여진동,오문영,Yeo Jin Dong,Oh Moon Young 대한방사선사협회 1999 대한방사선사협회지 Vol.25 No.1

As a result of execution of study through questionaries conerning the actual status of working being done by radiologises of the diagnostic radiation department, making 171 radioists who responded mon 200 radiogists City as of October 1998, as the subject

복부 비만 진단을 위한 CT, MRI, DITI 분석 및 임상적 유용성

여진동(Jin-Dong Yeo),전병규(Byeong-Kyu Jeon) 한국콘텐츠학회 2011 한국콘텐츠학회논문지 Vol.11 No.6

본 연구는 복부지방면적과 복부표면온도와의 상관관계를 알아보고자 연구하였다. CT와 MRI 검사을 시행하여 복부지방면적을 분석 하였고, 복부지방면적에 따른 복부표면온도는 적외선체열진단 검사로 측정하였다. 20명의 남녀 대학생을 대상으로 시행하였다. 분석 결과, CT와 MRI검사를 이용한 복부영역별 지방면적은 체중그룹과 모두 통계적으로 유의한 차이가 있었다. 복부표면온도는 T12번 부위에서만 통계적 유의성이 있었다. 체중그룹간의 복부표면 온도 차이는 0.7℃이상이었다. 결론적으로, CT는 가장 정확한 복부지방 측정 방법이다. 그러나 방사선 피폭과 고가의 검사 비용이 단점이다. 본 연구에서는 복부지방면적과 복부표면온도와의 상관관계가 있는 것으로 확인되었다. 따라서 적외선체열진단검사는 복부비만을 간편하게 진단 할 수 있는 방법이고, 임상적으로 유용할 것으로 생각된다. This study was to find out the correlation between abdominal surface temperature and abdominal fat areas. CT and MRI methods have been used to assess abdominal fat area. Abdominal surface temperature according to abdominal fat area was also measured by DITI. 20 college students were selected as the subjects for the study. The results, showed that there were statistically different significance in abdominal fats measured by CT and MRI according to weight groups. Abdominal surface temperature gap were measured by DITI and there was a statistically significant difference in only T12 region. temperature gaps between weight groups were over 0.7℃. In conclusion, CT method is the most accurate method to measure abdominal fat. However, weak points are radiation exposure and high cost for study. The correlation between abdominal surface temperature and abdominal fat areas were strong. Therefore, DITI may be considered as useful convenient method to evaluate the abdominal obesity and clinical usefulness.

음악요법이 경정맥요로조영 검사시 환자의 불안에미치는 영

여진동(Jin-Dong Yeo):고인호(In-Ho Ko) 한국방사선학회 2017 한국방사선학회 논문지 Vol.11 No.2

본 연구는 음악요법이 경정맥요로조영 검사로 인한 불안정도와 검사 시 불편감에 미치는 음악요법의 효과를 파악하고자 시도된 비동등성 대조군 사전-사후 실험설계의 유사 실험이다. “음악요법을 받은 군은 음악요법을 받지 않는 군보다 검사 중 불안 점수가 낮을 것이다”는 음악요법 실시 후 실험군의 불안점수가 대조군의 불안점수와 비교하여 유의한 차이가 있어 채택되었다. “음악요법을 받은 군은 음악요법을 받지 않는 군보다 검사 후 활력징후가 낮을 것이다”는 수축기 혈압, 이완기혈압에 대한 가설은 기각되었지만, 맥박에서는 유의 한 차이가 나타나 부분적으로 채택 되었다. “음악요법을 받은 군은 음악요법을 받지 않는 군보다 주간 적 불편감이 낮을 것이다”는 두 집단 간의 유의한 차이를 보였다. 한편 주관적인 불편 감의 하부요인 중 긴장감 에서만 유의한 차이가 있었으며, 동통, 어지러움, 공포감에서는 유의한 차이가 없었다. 이상의 연구결과로 볼 때 음악요법은 경정맥요로조영 검사 중 환자의 상태불안을 감소시킬 수 있는 유용한 대체검사법이 될 수 있을 것이라고 생각된다. This study is a research based on the non-equivalent control group pretest-posttest design whose purpose is to examine the effects of music therapy on the anxiety of patients who take the Intravenous Urography test and their feeling of discomfort during the test. The first hypothesis that the experimental group who receive music therapy will be lower in score for anxiety during the Intravenous UrographyI test than the control group who do not was supported because after the therapy, the experimental group was found significantly decreased in that score in comparison to the control group. The second hypothesis that the experimental group who receive music therapy will be fewer in vital signs after the Intravenous Urography test than the control group who do not was rejected in terms of both systolic and diastolic blood pressure. But the same hypothesis was partially supported because the two groups showed a significant difference in pulse rate after the test. The third hypothesis that the experimental group who receive music therapy will be less in the feeling of subjective discomfort during the Intravenous Urography test than the control group who do not was verified to find that the two groups were significantly different from each other in the feeling. Specifically, there was a significant difference between the two groups in only one sub-area of that These findings suggest that music therapy could be an alternative method which can effectively reduce the state anxiety of patients during the Intravenous Urography test.

자기공명영상에서 척추압박골절의 신호강도

여진동 ( Jin Dong Yeo ) 한국위생과학회 2009 한국위생과학회지 Vol.15 No.1