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슬관절의 3 차원 CT 영상과 2 차원 Xray 영상의 고속 정합에 알맞은 최적화 단계의 설정 방법 연구
우성경(Sungkyung Woo),감동욱(Donguk Kam),김대욱(Dae Wook Kim),이건우(Kunwoo Lee) (사)한국CDE학회 2016 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2016 No.동계
Numbers of patients who agree to take ‘Robotic Surgery’ rather than real human doctor is continually increasing. While taking TKA, Total Knee Anthropology, the accurate registration of the tibia bone and femur bone is needed, because the knee joint has to stand for human weight. TKA is surgery for replacing knee joint with the implant knee joint. We suggest the surgery plan should be performed by using radiography with information brought by registration of the CT image and X-ay image. Because of the unique shape of the knee joint, tibia, and femur, we also suggest which similarity metric produce the best result of registration. In order to do that, we also give guideline for using optimization methods for registration of medical images. The optimization methods showed different result which depends on the combination of similarity metric and optimization methods. The research also finds out which and why the combination caused different result.
의료 CT 영상으로 얻은 디지털 방사선 이미지와 X-ray 간의 고속 정합을 위한 최적화 방법
우성경(Sungkyung Woo),백승엽(Seung-Yeob Back),이건우(Kunwoo Lee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
TKA is surgery to replace worn and broken knee-joint into artificial joint made by steel or ceramics and etc. Digitally reconstructed radiography from 3D CT data should be extracted in order to be compared with X-ray image of patient. The accuracy of whole process of TKA surgery should be evaluated so that force distribution of body weight can be well defined. And also during surgery, the process should be checked to make sure if the axis of bones are well aligned. This process should be done as short as possible, because time delay may cause failure of whole process. Several optimization methods are compared in order to accomplish rapid registration of 3D CT to 2D x-ray image. In this paper, the applied Powells method will be used for making rapid registration of Medical Image, and the time matter will be analyzed. And also the reduction of error of registration process will be discussed.
3D model을 LEGO 블록으로 설계할 수 있는 자동화 알고리즘
장성제(Seongje Jang),우성경(Sungkyung Woo),감동욱(Dong-Uk Kam),백승엽(Seung-Yeob Baek),이건우(Kunwoo Lee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
We propose a novel approach to convert 3d mesh model into constructable brick layout. To make a 3D object with building blocks such as LEGO bricks, There are 3 restriction needed; constructability, solidity, stability. Constructabilty means building blocks in Lego layout are able to be assembled by basic rules of LEGO kits. Solidity means they are all connected to each other so that they make one solid 3d object. And stability means each block should be firmly interlocked so that the entire model has a certain level of stability. To satisfy these considerations, we employ a graphbased structural anaysis. This approach has a significance to make 3 criteria for converting 3d model to LEGO layout and satisfy them in any case.