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대한민국 표준체형의 인체 파라메트릭 분절모델 및 골격모델 생성
구본열(Bon-yeol Koo),최명환(Myeong-hwan Choi),김재정(Jay-jung Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Human body models representing the medical and engineering properties are becoming an important part in various fields such as military, medical, industrial and sports. However most of the human models used in such fields are based on European or American bodies. Therefore it has been reported that engineering analysis and simulation results for Koreans are not proper. In this paper, we propose a deformable parametric human model of Korean based on the principal parameters of height and weight which compose the segment and skeleton models for the standard bodies. For this, we divide the human body into individual 19 segments which are joined at the positions representing the physical 17 joints. Then the segment and skeleton models are parametrically defined to include key dimensions of a human body. The models can be scaled using the regression equations to represent different body shapes based on height and weight
한국인의 인체측정 데이터를 이용한 파라메트릭 인체분절모델 생성
구본열(Bon-Yeol Koo),최명환(Myeong-Hwan Choi),채제옥(Je-Wook Chae),김재정(Jay-Jung Kim) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.6
In this paper, we propose a methodology of generating a parametric segment model for human body using the Korean anthropometric data. The model is defined as an articulated body model consisted with 19 ellipsoid primitives. The primitives are joined at locations representing the physical joints of human body. A lot of previous researches have suggested methodologies of generating body models using the European or American anthropometric data, so that these models were inappropriate for engineering analyses and simulations in case of the Koreans. We defined a set of 35 body dimensions representing our segment model based on the anthropometric data of Koreans. Also we defined four key parameters of age, height, weight and waist circumference, and then we applied regression equations to associate the parameters to the aforementioned dimensions. As the results, we obtained the parametric human body segment models according to the various body types and the subject-specific models for a specific individual. The models in the various industries can be used as the base models for static and dynamic analysis considering the Koreans.
Tracking-Pin과 Fluoroscopic G-arm 이미지를 이용한 경골근위부절골술 지원시스템 개발
구본열(Bon-Yeol Koo),김철웅(Cheol-Woong Kim),이순혁(Sun-Hyuk Lee),배지훈(Ji-Hoon Bae),박철우(Cheol-Woo Park),김재정(Jay-Jung Kim) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2
High tibial osteotomy (HTO) is a widely accepted treatment for unicompartmental osteoarthritis of the knee and other lower extremity deformities, particularly for young and active patients. However, it is generally recognized as a technically demanding procedure. Thus the limitations of conventional surgical methods have been reported. Currently, the use of computer-aided surgery (CAS) system for successful surgery was increased. However it has been reported many problems such as expensive equipment, infection or fracture caused by inserting half-pin and delaying surgery. Therefore we propose a novel method which can be tracked by using tracking-pin inserted in arbitrary locations of the femur and tibia, and fluoroscopic images obtained from G-arm of antero-posterior and lateral-medial.
개방형 근위경골절골술의 3차원 수술계획을 위한 절골해석모델
구본열(Bon-yeol Koo),박병건(Byoung-keon Park),최동권(Dong-kwon Choi),김재정(Jay-jung Kim) (사)한국CDE학회 2013 한국CDE학회 논문집 Vol.18 No.6
Opening wedge high tibial osteotomy (OWHTO) is widely used to treat unicompartmental osteoarthritis of the knee caused by degenerative deformations of the anatomical axes of the leg. However, since it is difficult to accurately plan the surgical degrees of adjustment such as coronal correction angle and tibial posterior slope angle to align the axes before the actual procedure, a number of studies have proposed analytical models to solve this problem. While previous analytical models for OWHTO were limited to specific cases, this study proposes an analytical osteotomy model (AOM) and a surgical planning system (SPS) that are suitable for a wide range of tibial morphologies and tibia conditions. The validity and generality of the model were verified in a total of 60 OWHTO cases. Results of the test showed that, as predicted, surgical degrees are affected quite significantly by tibia shape and slope of the resected surface. Comparison of the required surgical degrees and the degrees estimated from virtual surgery simulations using AOM showed a very small average difference of 0.118˚. SPS, based on AOM, allows the operating surgeon to easily calculate surgical parameters needed to treat a patient.
Tracking-Pin과 Fluoroscopic G-arm 이미지를 이용한 경골근위부절골술 지원시스템 개발
구본열(Bon-Yeol Koo),김철웅(Cheol-Woong Kim),이순혁(Sun-Hyuk Lee),배지훈(Ji-Hoon Bae),박철우(Cheol-Woo Park),김재정(Jay-Jung Kim) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.5
High tibial osteotomy (HTO) is a widely accepted treatment for unicompartmental osteoarthritis of the knee and other lower extremity deformities, particularly for young and active patients. However, it is generally recognized as a technically demanding procedure. Thus the limitations of conventional surgical methods have been reported. Currently, the use of computer-aided surgery (CAS) system for successful surgery was increased. However it has been reported many problems such as expensive equipment, infection or fracture caused by inserting half-pin and delaying surgery. Therefore we propose a novel method which can be tracked by using tracking-pin inserted in arbitrary locations of the femur and tibia, and fluoroscopic images obtained from G-arm of antero-posterior and lateral-medial.
〈학술논문 or 기술논문〉 단층촬영 이미지를 이용한 인체골격의 파라메트릭 모델 생성
구본열(Bon-yeol Koo),김재정(Jay-jung Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this paper, we describe a method to create parametric models of the 3D human skeleton reconstructed from Computerized Tomography (CT). For this, we use 50 human skeleton samples which are composed of about 206 bones in each. Before generating the parametric models for these entire human bones, firstly we apply this method to a femur which is a large bone in the upper part of a leg. We define some feature points representing characters of femur with a semi-auto process for correspondence, and then we align the models to coincide the center of mass to one point. Based on the database deduced from the above process, we define parameters distinguishing the shape of a femur for using Principal Component Analysis (PCA) and parameterize the femur. By editing the parameter value came out from PCA, we obtain the new conformation of the feature points of averaging models. As transforming averaging models using Radial Basis Function (RBF), we finally generate the shapes of a femur we demand.
기능기반변형안 및 Computed muscle control 기술을 이용한 인체 동작 모사 및 예측을 위한 디지털 근골격모델의 개발
구본열(Koo, Bon-yeol),박병건(Park, Byoung-keon),박은주(Park, Eun-joo),채제욱(Chae, Jae-wook),김재정(Kim, Jay-jung) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
본 연구는 선행 개발된 기능기반변형기술(이하 FBD)을 이용하여 선정된 대상의 대퇴골 형상을 제어하고, 변형된 대퇴골의 형상과 이로 인한 근육 부착점의 이동이 대상의 보행에 어떠한 영향을 미치는 지를 분석한다. 또한 분석된 골격 형상과 보행 패턴의 관계를 기반하여 특정 대상인의 보행 패턴을 가상의 환경에서 모사하고, 나아가 골격의 형상만으로 대상의 보행을 예측할 수 있는 방법을 제안한다. 제안된 방법은 FBD를 이용함으로 정밀한 근육 부착점 및 고관절 형상을 기반으로 하였기 때문에 기존의 보행 예측방안에 비해 보다 정확한 근육활성도 분석모델 및 보행 예측 모델을 얻을 수 있었다. 제안된 방안의 유효성을 평가하기 위해 실제 사람의 보행 패턴을 삼차원으로 측정한 데이터와 가상에서 모사된 보행을 비교, 평가하였다.
기능기반 형상변형기술을 응용한 환자맞춤형 근골격 모델의 보행패턴 예측에 관한 연구
박병건(Byoung-Keon Park),구본열(Bon-yeol Koo),박은주(Eun-joo Park),체재욱(Jae-wook Chae),이순혁(Soon-Hyuk Lee),김재정(Jae-Jung Kim) (사)한국CDE학회 2012 한국CDE학회 논문집 Vol.17 No.6
The configuration of a musculoskeletal (MS) system is closely related to the individual motions of the human body. Many researches have been focused on evaluating the associations between the MS configuration and the individual motion using patient-specific MS models, but it still remains a challenging issue to accurately predict the motion by differed configurations of the MS system. The main objective of this paper is to predict the changes of a patient-specific gait by altering the geometric parameters of the hip joint using function-based morphing method (FBM). FBM is suitable for motion analysis since this method provide a robust way to morph a MS model while preserving the biomechanical functions of the bones. Computed-muscle control technique is used to calculate the muscle excitations to reproduce the targeted motion within a digital MS model without the motion-captured data. We applied this approach to a patient who has an abnormal gait pattern. Results showed that the femoral neck length and the angle significantly affect to the motion especially for the hip abduction angle during gait, and that this approach is suitable for gait prediction.