POLICY & ISSUES 환경정책 - 2013년 환경규제 추진방향과 개선과제

성지원,Seong, Ji-Won 환경보전협회 2013 환경정보 Vol.403 No.-

정부는 규제를 통해 삶을 보호하고 보장해 주는 정부의 역할을 기대하는 국민의식을 반영하여 쾌적하고 안전한 생활에 불가피한 규제의 신설과 강화를 중점분야로 표명함으로써, 규제를 완화하는 것만이 능사가 아님을 명확히 하고 있다. 이에 따라, 이제는 규제가 국민의 건강과 생명을 보호하고 쾌적하고 안전한 삶을 보장하는 '공공서비스'로서 국민과 더 가까워질 것으로 기대된다.

MEMS 가속도 센서를 이용한 환자 호흡동작 모니터링 체계 연구

성지원,윤명근,정원규,김동욱,신동오,Sung, Jiwon,Yoon, Myonggeun,Chung, Weon Kuu,Kim, Dong Wook,Shin, Dong Oh 한국의학물리학회 2013 의학물리 Vol.24 No.1

본 연구팀은 호흡 훈련을 통해 호흡의 안정성과 재현성을 증대시킴으로써 환자 적용 범위를 넓히고자 미세전자기계시스템(micro-electro-mechanical system, MEMs) 가속도 센서를 이용한 새로운 호흡훈련시스템을 개발하고자 한다. 본 연구는 호흡동작 모니터링의 선형연구로 MEMS 센서의 성능평가를 Respiratory Gating Platform (RGP)을 이용하여 2.5, 3.0, 3.5 s/cycle의 속도와 4.0, 3.0, 2.0 cm을 진폭으로 하는 1차원 왕복운동에 대한 MEMS 가속도 센서의 순간중력가속도에 대한 반응을 측정하였고 이를 Varian RPM (real time patient monitoring system) 시스템과 비교하였다. RGP의 운동 주기에 대한 MEMS 가속도 센서의 주기 오차는 0.6~6.0%로 측정되었으며 RPM 시스템과 MEMS 가속도 센서에 대한 진폭 감도오차는 1%와 3.6~11.5%로 측정 되었다. 본 연구를 통하여 MEMS 가속도 센서에 대한 환자 호흡 훈련용으로서의 가능성을 확인할 수 있었다. In this study, we developed and evaluated the patient respiration training method which can help to avoid the problems for the limitation of RGRT applicable patient cases. By using the MEMS (micro-electro-mechanical-system) acceleration sensor, we measured movement of motion phantom. We had compared the response of MEMS with commercially introduced real time patient monitoring (RPM) system. We measured the response of the MEMS with 1 dimensional motion phantom movement for 2.5, 3.0, 3.5 second of period and the 2.0, 3.0, 4.0 cm of the amplitudes. The measured period error of the MEMS system was 0.6~6.0% compared with measured period using RPM system. We found that the shape of MEMS signals were similar with RPM system. From this study, we found the possibility of MEMS as patient training system.

센서 기술을 활용한 음성보안 시스템 연구

성지원,이효준,조시헌,이우기 한국정책학회 2019 한국정책학회 동계학술발표논문집 Vol.2019 No.-

사람은 의사소통을 위해 언어적 단계와 생리학적 단계, 그리고 음향적 단계를 반복하는 말하기 듣기의 과정을 거친다. 이러한 인간의 음성 활동에서 측정이 가능한 생체신호를 이용하여 다양한 센서 기술들을 활용한 음성인식 기술이 최근 몇 년 동안 급속히 발전하고 있다. 특히, 인공지능을 기반으로 한 음성 인식기술의 발달로 관련 시장이 확대되어 다양한 서비스로 출시되고 있다. 그러나 음성인식에 대한 문제는 여전히 존재하며 악용하는 사례들도 증가하고 있다. 또한 후두적출 환자나 발음 장애가 있는 사람은 기술의 발전에도 불구하고 관련 서비스를 이용하지 못하는 문제점이 존재한다. 그렇기 때문에 본 논문에서는 발성이 필요 없는 무성인식에 초점을 맞추어 센서 기술을 포함한 앞으로 음성보안 시스템 구현에 사용 가능성이 있는 기술들을 소개하고, 나아가 기술 활용 시 프라이버시와 관련하여 고려해야하는 문제와 지원정책의 제시가 필요함을 이야기한다.

IoT 기반 상·하지 재활의료기기 훈련이 후기 뇌졸중 생존자의 보행에 미치는 영향: 사례연구

성지원,조영채,서은영,김록현,윤범철 대한스포츠물리치료학회 2019 정형스포츠물리치료학회지 Vol.15 No.2

Purpose: For stroke survivors, abnormal gait patterns lead to a significant risk of falls. We have recentlydeveloped an IoT-based Upper and Lower Extremity Rehabilitation Medical Device (RoBoGat) that enablescontinuous passive motion (CPM) training, squat training (ST), and gait training (GT). The purpose of thisstudy was to test the effectiveness of RoBoGat on gait in a chronic stroke survivor. Methods: In this study, an individual with right-side chronic hemiparesis post-stroke participated. Theparticipant underwent 14 days of RoBoGat training that involved continuous passive motion training, squattraining, and gait training. During the training, knee and hip joint angles were adjusted within the range wherethe subject felt no pain. We assessed gait, timed up and go test, and visual analog scale at baseline andafter first and final interventions. Results: After the intervention, positive changes were observed such as stride, gait velocity, and loadingphase. Improvements were also observed in timed up and go tests. However, there was no significant changein VAS, which assessed pain in training and daily life. Conclusion: The main finding of this case-control study is that robot-based upper and lower extremity trainingmay be a feasible approach in the neurorehabilitation field. It can be concluded that repetitive and continuousrobot rehabilitation exercises have a positive effect on improving the physical function of chronic strokesurvivors.

Estimate of the Shielding Effect on Secondary Cancer Risk due to Cone-beam CT in Image-guided Radiotherapy

성지원,백태성,윤명근,김동욱,김동현 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.5

This study evaluated the effect of a simple shielding method using a thin lead sheet on the imagingdose caused by cone-beam computed tomography (CBCT) in image-guided radiation therapy(IGRT). Reduction of secondary doses from CBCT was measured using a radio-photoluminescenceglass dosimeter (RPLGD) placed inside an anthropomorphic phantom. The entire body, except forthe region scanned by using CBCT, was shielded by wrapping it with a 2-mm lead sheet. Changes insecondary cancer risk due to shielding were calculated using BEIR VII models. Doses to out-of-fieldorgans for head-and-neck, chest, and pelvis scans were decreased 15 100%, 23 90%, and 23 98%, respectively, and the average reductions in lifetime secondary cancer risk due to the 2-mmlead shielding were 1.6, 11.5, and 12.7 persons per 100,000, respectively. These findings suggestthat a simple, thin-lead-sheet-based shielding method can effectively decrease secondary doses toout-of-field regions for CBCT, which reduces the lifetime cancer risk on average by 9 per 100,000patients.

Examination of a Micro-electro-mechanical System Based on a Portable Respiratory Monitoring System

성지원,윤명근,허현도,신동오,정원규,김동욱 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.4

This study aimed to examine the feasibility of a portable respiratory monitoring system (PRMS) based on a micro-electro-mechanical system (MEMS). The performance of the PRMS was estimated by comparing the actual and the measured movements of the linear and the angular motions by using a one-dimensional motion phantom. The results indicated that differences between the actual and the measured movements ranged from −0.3% to −0.9% and from −7.07% to 2.93% for the periods and the amplitudes in linear motion and from −6.5% to 4.3% and from −9.5% to −5.2% for the periods and the amplitudes in angular motion. The PRMS reproduces a signal that is similar to the actual motion, and the uncertainty generated in the electronic error and the tilting movement was reduced when the velocities of movement were higher than 0.6 cm/s and 0.08 /s. In this study, we found that the PRMS is applicable to respiratory motion training for relatively normal or fast respiratory cases and that with a more sensitive sensor, it can be the expanded to slower respiration cases.

운동프로그램이 주의력결핍과잉행동장애(Attention Deficit Hyperactivity Disorder) 아동 및 청소년의 주의집중력에 미치는 영향: 체계적 고찰

성지원,이민아,김준식,이경인,김민아,이유나 한국노인작업치료학회 2023 한국노인작업치료학회지 Vol.5 No.2

Objective : This study investigated how exercise programs affect the attention of children and adolescents with Attention Deficit Hyperactivity Disorder (ADHD). Methods : The study searched the Research Information Sharing Service, Korean studies Information Service System, DataBase Periodical Information Academic, Science on, and PubMed databases to gather studies conducted between January 2019 and March 2023 using “ADHD,” “attention,” and “exercise program” as search terms. Among the results, seven studies met the inclusion criteria. Results : All seven studies found that exercise programs significantly improved the attention of children and adolescents with ADHD. Significantly positive effects were also observed on their motor functions, self-confidence, and impulsivity. Conclusion : This systematic review confirmed the effectiveness of exercise programs for children and adolescents with ADHD. These results suggest that such children and adolescents could benefit from the effects of exercise programs.

RapidArc를 이용한 호흡연동 회전세기조절방사선치료 할 때 전달선량의 정확성 평가

성지원,윤명근,정원규,배선현,신동오,김동욱,Sung, Jiwon,Yoon, Myonggeun,Chung, Weon Kuu,Bae, Sun Hyun,Shin, Dong Oh,Kim, Dong Wook 한국의학물리학회 2013 의학물리 Vol.24 No.2

환자 호흡할 때 흉 복부 내부에 있는 장기의 위치는 주기적으로 변한다. 이에 따라 방사선치료 동안 종양에 대한 선량불확도가 발생하게 되며, 불확도를 줄이기 위한 여러 방사선치료방법이 제시되고 있다. 호흡연동방사선치료는 특정 위상 또는 진폭에만 방사선을 조사하는 방법으로 불필요한 피폭선량은 줄일 수 있는 장점이 있지만 긴 치료 시간과 노력이 필요하다는 단점이 있다. 호흡연동방사선치료 중 회전세기조절방사선치료(respiratory gated Volumetric Modulated Arc Therapy, VMAT)는 다른 호흡연동치료시스템에 비해 치료 시간이 짧다는 장점이 있기 때문에 본 연구는 respiratory gated VMAT 치료 선량의 정확성을 검증하여 임상 적용의 적절성을 평가하고자 한다. 본 연구는 총 6개의 VMAT 치료계획(Eclipse, ver. 8.6, Palo Alto, USA)을 토대로 수행되었으며, 각각의 치료계획은 AAA 알고리즘을 이용해서 선량이 계산되었다. 환자의 호흡운동을 구현하기 위해 환자 테이블 위에 1차원운동팬텀이 사용되었으며, 영상 기반 추적 시스템(Real-time Position Management, RPM, Varian Medical Systems, Palo Alto, USA)을 통해 운동 주기 신호를 획득하였다. 또한, 2차원-이온함-배열(MatriXX, IBA, Germany) 측정기를 이용하여 특정 호흡 신호 위상에 따른 전달 선량을 측정하였다. 측정된 선량과 치료 계획된 선량을 정성적인 분석을 위해 상용화되어 있는 선량분석용 프로그램(I'mRT, IBA, Germany)을 통해 2차원 선량분포를 0에서 1사이의 감마지표(Gamma index) 비교 결과 모든 케이스에서 97% 이상의 일치함을 확인하였다. 따라서 호흡연동 회전세기조절 방사선치료는 호흡연동방사선치료의 단점인 시간적인 제약을 일정 부분 해소할 수 있었으며 2차원 선량분포 비교 결과 오차값 3%이내의 정확도에서 환자정도관리 수준을 만족하였고 임상적용이 가능함을 확인하였다. The position of the internal organs can change continually and periodically inside the body due to the respiration. To reduce the respiration induced uncertainty of dose localization, one can use a respiratory gated radiotherapy where a radiation beam is exposed during the specific time of period. The main disadvantage of this method is that it usually requests a long treatment time, the massive effort during the treatment and the limitation of the patient selection. In this sense, the combination of the real-time position management (RPM) system and the volumetric intensity modulated radiotherapy (RapidArc) is promising since it provides a short treatment time compared with the conventional respiratory gated treatments. In this study, we evaluated the accuracy of the respiratory gated RapidArc treatment. Total sic patient cases were used for this study and each case was planned by RapidArc technique using varian ECLIPSE v8.6 planning machine. For the Quality Assurance (QA), a MatriXX detector and I'mRT software were used. The results show that more than 97% of area gives the gamma value less than one with 3% dose and 3 mm distance to agreement condition, which indicates the measured dose is well matched with the treatment plan's dose distribution for the gated RapidArc treatment cases.

The Accuracy of the Calculated Dose for a Cardiac Implantable Electronic Device

성지원,손재만,박종민,김정인,최창헌 한국의학물리학회 2019 의학물리 Vol.30 No.4

The objective of this study is to monitor the radiation doses delivered to a cardiac implantable electronic device (CIED) by comparing the absorbed doses calculated by a commercial treatment planning system (TPS) to those measured by an in vivo dosimeter. Accurate monitoring of the radiation absorbed by a CIED during radiotherapy is necessary to prevent damage to the device. We conducted this study on three patients, who had the CIED inserted and were to be treated with radiotherapy. Treatment plans were generated using the Eclipse system, with a progressive resolution photon optimizer algorithm and the Acuros XB dose calculation algorithm. Measurements were performed on the patients using optically stimulated luminescence detectors placed on the skin, near the CIED. The results showed that the calculated doses from the TPS were up to 5 times lower than the measured doses. Therefore, it is recommended that in vivo dosimetry be conducted during radiotherapy for CIED patients to prevent damage to the CIED.

환경인, 정책과 기술의 조종자

성지원(Seong Jiwon) 한국환경정책학회 2016 한국환경정책학회 학술대회논문집 Vol.2016 No.2