• 대한구순구개열학회지
• /
• 제6권2호
• /
• pp.91-105
• /
• 2003

There are significant limitations in the precision of mandibular distraction in setting a desired occlusal and facial esthetic outcome. The purpose of this study is to present the simulation method for the distraction osteogenesis treatment planning. 3-D surgery simulation software programs V-works and V-Surgery(Cybermed, Seoul, Korea) were used from the 3D CT data in addition to the conventional data facial photography, panorama and cephalogram, dental cast model. We have utilized already for the various surgical procedures to get information preoperatively for the maxillofacial surgery like cancer localization and reconstructive surgery, orthognathic surgery and implant surgery in the department of Oral and Maxillofacial surgery, Seoul National University Hospital. On the software, bone cutting can be done at any place and any direction. Separated bone segment can be mobilized in all 3 dimensional direction. After the 3D simulation on the software program, mock surgery on the RP model can be performed. This planning method was applied to two hemifacial microsomia patients. With this protocol, we could simulate the movement of bony segment after maxillofacial distraction osteogenesis

• 융합정보논문지
• /
• 제9권1호
• /
• pp.61-67
• /
• 2019

본 연구의 목적은 시뮬레이션 기반 교육이 간호대학생의 전문심폐소생술 지식, 수행에 대한 자신감, 비판적 사고성향, 임상실무능력에 영향을 미치는 효과를 파악하고자 실시된 단일군 사전-사후 실험연구이다. 연구대상자는 J지역에 소재한 간호학과 4학년 성인간호학교과목을 수강한 35명의 학생으로 자료는 설문지를 이용하여 시뮬레이션 실습교육 전 후에 수집되었다. 연구결과 전문심폐소생술 지식, 수행에 대한 자신감, 비판적 사고성향, 임상실무능력 모두가 통계적으로 유의미하게 향상되었다. 그러므로 시뮬레이션 기반 교육이 간호대학생의 전문심폐소생술 지식, 수행에 대한 자신감, 비판적 사고성향, 임상실무능력에 미치는 긍정적인 효과를 확인하였다. 전문심폐소생술 지식, 수행에 대한 자신감, 비판적 사고성향, 임상실무능력을 상승시키는 시뮬레이션 기반교육의 실습모듈 개발 및 교육효과를 검증할 수 있는 후속연구가 필요하다고 생각된다.

• 문화기술의 융합
• /
• 제9권3호
• /
• pp.435-442
• /
• 2023

본 연구의 목적은 간호대학생의 호흡기 감염질환 지식과 임상수행에 대해 표준화 환자를 활용한 시뮬레이션 교육의 효과를 분석하는 것이다. 간호학과 4학년생 112명을 대상으로 2020년 3월 2일부터 6월 15일까지 표준화 환자를 활용하여 전염성 호흡기계 환자 간호를 위한 단일군 전후 설계이다. 호흡기 감염병 교육 프로그램 '폐 감염병 지식', '손 씻기', '마스크 착용', '환자 및 간병인에게 마스크 착용 유도', '정맥주사' '3way 주사', '외과적 무균술', '소독 의료기기', '오염된 린넨 관리', '감염자 관리 매뉴얼' 등 10개 교육 과제 수행이며 강의, 기술 훈련, 표준화된 환자를 이용한 시뮬레이션, 디브리핑으로 구성되었다. 표준화된 환자를 이용한 시뮬레이션 교육 후 호흡기 감염질환에 대한 학생의 지식과 임상수행능력이 유의미한 향상을 보였으며, 다양한 감염관리 실습에 활용될 것으로 기대한다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권8호
• /
• pp.4072-4089
• /
• 2018

This paper introduces a scheme for optimizing the material properties of mass-spring systems of different resolutions to provide coherent behavior for reduced level-of-detail in MSS(Mass-Spring System) meshes. The global optimal material coefficients are derived to match the behavior of provided reference mesh. The proposed method also gives us insight into levels of reduction that we can achieve in the systematic behavioral coherency among the different resolution of MSS meshes. We obtain visually acceptable coherent behaviors for cloth models based on our proposed error metric and identify that this method can significantly reduce the resolution levels of simulated objects. In addition, we have confirmed coherent behaviors with different resolutions through various experimental validation tests. We analyzed spring force estimations through triangular Barycentric coordinates based from the reference MSS that uses a Gaussian kernel based distribution. Experimental results show that the displacement difference ratio of the node positions is less than 10% even if the number of nodes of $MSS^{sim}$ decreases by more than 50% compared with $MSS^{ref}$. Therefore, we believe that it can be applied to various fields that are requiring the real-time simulation technology such as VR, AR, surgical simulation, mobile game, and numerous other application domains.

• 한국컴퓨터정보학회논문지
• /
• 제28권12호
• /
• pp.89-96
• /
• 2023

본 논문에서는 GPU기반으로 옷감을 찢는 데 필요한 동적 재메싱를 실시간으로 처리할 수 있는 방법을 제안한다. 얇은 쉘 재질은 물리 기반 시뮬레이션/애니메이션, 게임, 가상현실 등 다양한 분야에서 활용되고 있다. 옷감을 찢는 것은 기하학과 연결 구조를 동적으로 갱신해야 되기 때문에 그 처리 과정이 복잡하고 계산양이 크다. 특히 인터랙티브 콘텐츠를 다루는 분야에서는 이 과정이 빠르게 수행되어야 한다. 대부분의 방법에서는 실시간을 유지하기 위해 저해상도 시뮬레이션을 통해 재메싱을 수행하거나 이미 분할된 패턴을 그대로 이용하기 때문에 동적 재메싱이라고 보기 어려우며, 찢어진 패턴의 품질이 낮다. 본 논문에서는 GPU에 최적화된 동적 재메싱 알고리즘을 새롭게 제안함으로써 고해상도 옷감 찢어짐을 실시간으로 처리할 수 있게 한다. 본 논문에서 제안하는 방법은 사전에 쪼개진 메쉬 형태가 아닌 동적 재메싱이 가능하기 때문에 가상 수술시뮬레이션이나, 실시간을 요구하는 게임 및 가상환경에서 물리 기반 모델링울 할 때 활용될 수 있다.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제41권
• /
• pp.14.1-14.10
• /
• 2019

Background: Condylar dislocation can arise as a complication in patients who required mandibular and/or condylar reconstruction and were operated on with fibula free flap (FFF) using surgical guides designed using simulation surgery. Surgeons should be aware of the complications in these present cases when planning and performing reconstructions as well as predicting prognoses. Cases presentation: Two cases showed condylar dislocation in mandibular reconstruction using a FFF fixed with a reconstruction plate. Three cases showed condylar dislocation in mandibular reconstruction using a fibula free flap fixed with a mini-plate. Conclusion: Despite the lack of clinical symptoms in these cases following mandibular reconstruction using an FFF, the mandibular condyle was severely displaced away from the glenoid fossa. A surgeon must have sufficient time to consider the use of a long flap with thickness similar to that of the mandible, ways to minimize span and bending, and methods of fixation. The patient, moreover, should be educated on condylar dislocation. Customized CAD/CAM-prototyped temporomandibular condyle-connected plates may be a good alternative even if virtual simulation surgery is to be performed before surgery. These considerations may help reduce the incidence of complications after mandibular reconstruction.

• Archives of Plastic Surgery
• /
• 제40권4호
• /
• pp.302-303
• /
• 2013

Current educational interventions and training courses in microsurgery are often predicated on theories of skill acquisition and development that follow a 'practice makes perfect' model. Given the changing landscape of surgical training and advances in educational theories related to skill development, research is needed to assess current training tools in microsurgery education and devise alternative methods that would enhance training. Simulation is an increasingly important tool for educators because, whilst facilitating improved technical proficiency, it provides a way to reduce risks to both trainees and patients. The International Microsurgery Simulation Society has been founded in 2012 in order to consolidate the global effort in promoting excellence in microsurgical training. The society's aim to achieve standarisation of microsurgical training worldwide could be realised through the development of evidence based educational interventions and sharing best practices.

• Radiation Oncology Journal
• /
• 제29권4호
• /
• pp.277-282
• /
• 2011

Purpose: This study was performed to evaluate the change in the lumpectomy cavity volumes before and after whole breast radiation therapy (WBRT) and to identify factors associated with the change of volume. Materials and Methods: From September 2009 to April 2010, the computed tomography (CT) simulation data from 70 patients obtained before and after WBRT was evaluated. The lumpectomy cavity volumes were contoured based on surgical clips, seroma, and postoperative changes. Significant differences in the data from pre-WBRT CT and post-WBRT CT were assessed. Multiple variables were examined for correlation with volume reduction in the lumpectomy cavity. Results: The mean and median volume reduction in the lumpectomy cavity after WBRT were 17.6 $cm^3$ and 16.1 $cm^3$, respectively with the statistical significance (p < 0.001). The volume reduction in the lumpectomy cavity was inversely correlated with time from surgery to radiation therapy (R = 0.390). The presence of seroma was significantly associated with a volumetric change in the lumpectomy cavity after WBRT (p = 0.011). Conclusion: The volume of lumpectomy cavity reduced significantly after WBRT. As the time from surgery to the start ot WBRT increased, the volume reduction in the lumpectomy cavity during WBRT decreased. A strong correlation was observed between the presence of seroma and the reduced volume. To ensure appropriate coverage and to limit normal tissue exposure during boost irradiation in patients who has seroma at the time of starting WBRT, repeating CT simulation at boost planning is suggested.

• 한국산학기술학회논문지
• /
• 제16권12호
• /
• pp.8176-8186
• /
• 2015

본 연구는 간호 대학생에게 성인간호학 이론수업과 실습교육의 단절로 발생하는 문제점을 해결하기 위해 High-Fidelity 시뮬레이션 교육프로그램을 개발하여 적용함으로써 그 효과를 분석하고자 시행되었다. 분석방법은 성인간호학 이론수업의 학습목표에 따라 비뇨기계 대상자 간호에서 고칼륨혈증 대상자 간호를 위한 알고리즘, 평가체크리스트, 디브리핑을 포함한 시나리오를 개발하여 비동등성 대조군 전후설계(non-equivalent control group pre-test and post-test design)로 측정하였다. 분석결과 일반적 특성과 종속변수의 실험군과 대조군의 동질성이 확보되었다. 고칼륨혈증 대상자 시뮬레이션 교육프로그램이 간호대학생의 간호수행능력, 문제해결능력, 비판적 사고성향, 자기효능감, 간호지식정도에 미치는 효과는 시뮬레이션 교육을 받은 실험군이 대조군 보다 유의하게 증가하였고, 통계적으로 유의한 차이가 있는 것으로 나타났다(t=-83.313, p<.001, t=-3.169, p=.003, t=-2.473, p=.017, t=-4.036, p<.001, t=-5.044, p<.001). 간호학생의 성인간호학 이론수업과 연계한 High-Fidelity 시뮬레이션 프로그램은 간호수행능력, 문제해결능력, 비판적 사고성향, 자기효능감, 간호지식을 높게 하는 것으로 나타났다. 이러한 시뮬레이션 실습교육 프로그램을 교육과정에 적용함으로써 효율적인 실습교육 방안을 제시하고 간호교육의 질 제고에 기여할 수 있을 것이다.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2008년도 추계학술대회A
• /
• pp.518-522
• /
• 2008

Recently, many patients related to heart disease have surgical operation by expanding a blood vessel to treat the angiostenosis. So far most angioplasties have been performed using balloon-dilative stent made of stainless steel. Some researchers are studying the stent made of shape memory alloy (SMA) to operate the angioplasty more easily. and there are several papers which introduce the angioplasty using SMA. However, most of the analysis models for stents are constructed using solid elements. So much computing time is required to solve the analysis model. In this study, we suggest the SMA stent model using 1D truss element which is much faster than stent model using 3D solid element. To represent non-linear behavior of SMA, we apply 1D SMA constitutive equation of Lagoudas'. Pseudo-elastic behavior of stent structures is presented as a numerical example.