입체 방사선 치료 기술과 입자선 에너지를 이용한 종양 치료

지연상,최성관,Ji, Yeon-Sang,Choe, Seong-Gwan 한국전기전자재료학회 2010 전기전자재료 Vol.23 No.10

입출력 데이터 클러스터링에 의한 퍼지 교통 제어기의 설계

지연상(Ji-yeon Sang),최완규(Wan-kyoo Choi),이성주(Sung-joo Lee) 한국지능시스템학회 2001 한국지능시스템학회논문지 Vol.11 No.3

PDA기반 의료영상의 전송시스템 구현

지연상(Yeon-Sang Ji),동경래(Kyung-Rae Dong),김창복(Chang-Bok Kim) 한국콘텐츠학회 2009 한국콘텐츠학회논문지 Vol.9 No.4

PACS(Picture archiving communication system)란 의료영상정보를 디지털 영상으로 획득, 저장 하여 외래나 병동에서 언제든지 검색 및 조회가 가능한 시스템을 의미 하지만 휴일과 야간에는 의료영상정보에 대한 접근이 공간적으로 제한되어 있어서 환자의 검사결과에 대한 정보를 조회 할 수 없는 문제점이 있다. 이에 대한 해결 방안은 무선 LAN과 CDMA 전화기가 내장된 PDA를 이용하여 판독의사나 수술의사 등이 원외에서도 의료영상정보에 접근하여 환자의 처치 등에 관하여 원격으로 처방 할 수 있는 서비스 방식이 유용 하다. 이런 방식은 PDA와 무선랜의 하드웨어적 특성상 JPEG 파일 형태로 서비스 할 수밖에 없는데 10:1 압축 방식에서 진단가치를 잃지 않으면서도 최대의 효과를 낼 수 있었다. 또한 추후 네트워크 속도와 하드웨어적 사양이 개선된다면 DICOM 무손실 이미지의 조회도 구현 가능함을 알 수 있었다. PACS(Picture archiving communication system) is a system that enables medical images such as X-ray, CT, MRI, PET to be stored electronically viewed on computer screens so that doctors and other authorized people can access search the information as needed. But if they are not in hospital area for example on holiday or at night, that are not able to access the PACS system instantly. We have to solve this problem for more efficient patient care. So we try to suggest a method that use the PDA system that wireless LAN and CDMA cellular phone are equipped. This system may help to access easier to PACS system regardless of the location and can also attribute the development of telemedicne.

RFID와 Worklist 중심의 OCS 프로그램 접목을 통한 환자유도시스템 개발과 환자만족도 조사

지연상(Yeon-Sang Ji),동경래(Kyung-Rae Dong),김창복(Chang-Bok Kim) 한국콘텐츠학회 2009 한국콘텐츠학회논문지 Vol.9 No.5

컴퓨터가 도입된 이후 업무편리성이 증가한 반면 업무의 융통성이 줄어들어 업무의 일정 부분에서는 인간이 컴퓨터에 종속된 경향이 있다. 기존에는 영상의학과 접수에서 촬영완료에 이르기 까지 사람이 작업함으로써 많은 시간이 소요되고 환자 입장에서는 촬영순서 및 촬영 과정을 인지하기 어려운 단점이 있었다. 임상에서 RFID는 종합검진센터에서 환자의 위치추적을 목적으로 사용한바 있기 때문에 영상의학과에서 업무 효율성을 증가할 목적으로 RFID와 Workflow 중심의 OCS 시스템을 적용하여 업무 흐름을 개선하고자 하였다. 그래서 RFID를 접목 시킨 Worklist 중심 OCS 프로그램을 개발한 결과 환자 만족도와 업무 흐름이 월등히 개선되는 효과를 거두었다. 이런 결과를 토대로 RFID 시스템은 추후 PACS등과 연계하여 Worklist에 접목 시킨다면 병원 업무에서 진정한 의미의 Ubiquitous를 구현하는 방안으로 유용한 시스템이라 여겨진다. With the introduction of the computer, convenience at work may have increased but flexibility decreased along with a tendency for humans to become secondary to computers with regards to work schedules. As it exists, from entering the department of radiology to completion of imaging requires a great deal of time and difficulties in understanding the imaging process adds to patient dissatisfaction. Since clinics use RFID bars to track patient locations at comprehensive medical testing centers, departments of radiology may apply RFID and Worklist at the core of the OCS system in order to increase work efficiency and improve work flow. As a result of developing an RFID and Worklist centered OCS program, there was a vast improvement in patient satisfaction and work flow. Theses results are the basis of an RFID system that in the future may be connected to PACS and other systems with an intergrated Worklist. There is a need to realize a plan the can offer ubiquity to hospital work.

외부의료영상의 PACS 등록 시 OCS상 FTP Module의 유용성

정명진,동경래,지연상,최정길,전재두,Jung, Myung-Jin,Dong, Kyung-Rae,Ji, Yeon-Sang,Choi, Jung-Gil,Jeon, Jae-Doo 대한디지털의료영상학회 2009 대한디지털의료영상학회논문지 Vol.11 No.1

This study was conducted to improve performance flow of PACS registration and output of external medical images by developing or adding File Transfer Protocol(FTP) Module on Order Communication System(OCS) and to upgrade efficiency of performance. The numbers of requests for examination of external medical images from January 2004 to December 2007 were investigated and the numbers of cases of examinations and losses were done respectively from January to June, 2007 as a period before the improvement and from July to December, 2007 as a period after it. Satisfaction of persons inputting external medical images of CD was asked directly before and after the improvement. When the numbers of requests for examination of external medical images from 2004 to 2007 2004 were investigated, they were 12,783, 16,774, 21,613 and 27,487 cases in 2004, 2005, 2005 and 2007 respectively. For the numbers of the requests from January to December, 2007 it was the lowest in February by recording 1846 and it was 2800 in October. While the number of loss of external medical images was averagely 3.6 before using FTP Module on OCS, it reduced to 0 and satisfaction increased to 98% after it. By utilizing FTP Module on OSC for PACS registration of external medical images, the images were delivered simultaneously with occurrence of order, PACS registration of many patients was conducted together and CDs were returned to patients immediately after sending images from outpatient clinics or wards to remove possibility of losing them. In addition, because the module was established on OCS and data were sent associated with order, problems related with order were decreased. By eliminating movement distance it was turned out to be very effective in terms of time and space.

증감약제를 투여한 마우스에 고에너지 방사선 조사 후 혈액학적 변화에 관한 연구

정묘영(Jung Myo-Young),지연상(Ji Yeon-Sang),동경래(Dong Kyung-Rae) 한국콘텐츠학회 2009 한국콘텐츠학회 종합학술대회 논문집 Vol.7 No.1

최근 노인인구의 증가와 평균수명의 연장으로 암 발생빈도가 증가 추세에 있고, 암환자를 위한 방사선치료가 증가되면서 장해의 인식과 중요성이 널리 알려져 있다. 본 연구에서는 미량의 선량부터 고 선량의 방사선을 마우스에 조사하여 급성장해로 나타나는 혈액세포의 변화를 비교 실험함으로 종양치료 환자들의 조혈기계 장해를 알 수 있었다. 따라서 증감제 투여는 말초혈액 성분의 많은 장해를 초래할 수 있으므로 종양환자 치료 시 조혈기계 장해의 위험성을 고려해야 될 것으로 사료되며, 합리적인 방사선 치료가 이루어질 것으로 판단된다. The current population of elderly is increasing and the with an extended average lifespan, the frequency of cancerous occurrences have also increased, with these increases and the increase in radiotherapy for cancer patients, recognitions of harm and importance have become known. This article was known tumor treatment of patients with hematopoietic disorder by doing a comparative study on the changes in blood cells caused by the acute effects of trace dose to high dose of radiation exposed to mice. According to the sensitizer injection may give rise to harm to the components of peripheral blood. This material needs to be considered when for treating tumor patients and the risks of hematopoietic harm and believe that radiation therapy will be reasonable.

4차원 방사선 치료시 Body Fix의 유용성 평가

김영재(Young-Jae Kim),장영일(Young-Ill Jang),지연상(Yeon-Sang Ji),한재복(Jae-Bok Han),최남길(Nam-Gil Choi),장성주(Seong-Joo Jang) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.10

본 연구에서는 간암 치료시 Body fix를 이용하여 4DRT를 실시할 경우 종양의 체적, 위치의 변화정도, 종양 및 정상조직의 선량흡수정도를 파악하여 Body fix의 유용성을 평가하였다. 사전 연구에 동의한 23명의 환자를 대상으로 Body fix의 착용 유무에 따라 각기 다른 4차원 모의치료영상을 획득하여 영상을 바탕으로 종양조직 및 정상조직을 설정하고 분석하였다. 종양의 용적을 분석해본 결과 Body fix의 사용이 GTV는 0.17%, CTV와 PTV는 3.2% 정도 체적을 줄일 수 있었으며, 종양의 운동성은 AP방향에서 29.8%, UL방향에서 5.31%의 움직임을 감소시킬 수 있었다. 종양의 흡수선량 값은 Body fix를 사용한 경우가 다소(1.3%) 높았으며 정상조직(정상간, 위, 우측신장, 척수)의 흡수선량은 5% 정도 줄일 수 있었다. 따라서 간암의 4DRT시 Body fix는 유용하게 사용할 수 있을 것으로 생각된다. This study investigates the usefulness of body fix in 4DRT on Liver cancer trying to find tumor tissues volume and located variations, absorbed dose on tumor and normal tissues. Test subjects 23 patients were agreed these test. These patients have a 4 dimensional CT scan. We make an acquisition on patients CT image by two types -put on the body fix or not-. Average tumor volume reduced by 0.17% on GTV and 3.2% on CTV and PTV. Tumors variation reduces 29.8%(anterior and posterior, AP) and 5.31% (upper and lower, UL). The absorbed tumor doses under put on the body fix was a little higher(1.3%) than other. Normal tissues(normal liver, stomach, Rt. kidney, spinal cord) absorbed dose could be reduced approximately 5%. Therefore, using body fix on 4DRT for liver cancer patient is considered effectively.

방사선 취급 작업종사자의 개인 피폭선량(Individual Dose)에 관한 연구

동경래(Kyung-Rae Dong) ⋅김창복(Chang-Bok Kim) ⋅박용순(Yong-Soon Park) ⋅지연상(Yeon-Sang Ji) ⋅김치년(Chi-Nyon Kim) ⋅원종욱(Jong-Uk Won) ⋅노재훈(Jae-Hoon Roh) 한국실내환경학회 2009 한국실내환경학회지 Vol.6 No.1

The importance of managing the exposure to radiation for radiological technologist is becoming more conspicuous as modern medical care increases the number of hospital exams involving radiation and as work of radiological technologists expand and increase in areas using advanced medical equipment for diagnosis and treatment purposes involving radiation. Measurements for individual exposure dose to radiation can differ according to the equipment and facilities in the work environment and the average number of exposures an individual is involved in. Therefore, systematic and reasonable controls on the exposure dose to radiation can be attained from core data. Shallow dose/Deep dose measurements were taken according to the year of the measurement, the technologist’s occupation post, gender, department, and age over a five year period from January 1, 2003 to December 31, 2007 using a sample of radiological technologists from ten general hospitals throughout S. Korea. When comparing individual exposure dose of each radiological technologist, there was no significant difference in the mean exposure dose according to the year the measurement was taken (p>0.05). Mean exposure dose for Deep/Shallow according to gender showed that men received significantly higher exposure dose than women (p<0.001). Mean exposure dose for Deep/Shallow according to age showed an increase in exposure dose as age decreases; however, it was not statistically significant (p>0.05). According to occupation post, technologists working in nuclear medicine received significantly higher dose than other occupation posts (p<0.001). The results of individual exposure dose were under the dose limits in accordance to all nuclear regulations. Furthermore, since stochastic effects may occur with long-term exposure to low level radiation, individual exposure dose data was thoroughly managed and the principle of As Low as Reasonably Achievable (ALARA) was implemented when establishing the design of this study.