Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Interactive Virtual Anthroscopy Using Isosurface Raycasting Based on Min-Max Map

최대-최소맵 기반 등위면 광선투사법을 이용한 대화식 가상 관절경

  • 임석현 (인하대학교 전자계산공학과) ;
  • 신병석 (인하대학교 전자계산공학과)
  • Published : 2004.04.01
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Abstract

A virtual arthroscopy is a simulation of optical arthroscopy that reconstructs anatomical structures from tomographic images in joint region such as a knee, a shoulder and a wrist. In this paper, we propose a virtual arthroscopy based on isosurface raycasting, which is a kind of volume rendering methods for generating 3D images within a short time. Our method exploits a spatial data structure called min-max map to produce high-quality images in near real-time. Also we devise a physically-based camera control model using potential field. So a virtual camera can fly through in articular cavity without restriction. Using the high-speed rendering method and realistic camera control model, we developed a virtual arthroscopy system.

가상 관절경은 무릎, 어깨 둥 관절에 대한 단층촬영 영상으로부터 관절 내부의 해부학적 구조를 3차원으로 재구성함으로써 광학 관절경을 모사 하는 기법이다. 이 논문에서는 볼륨 렌더링 기법의 일종인 등위면 광선투사법을 이용하여 3차원 영상을 신속하게 생성하는 가상 관절경 기법을 제안한다 여기서 제안하는 등위면 광선투사법은 최대-최소맵을 이용하여 전처리 과정 없이도 실시간에 가까운 속도로 고화질의 영상을 얻을 수 있다. 또한 물리 기반 카메라 제어 모델을 이용함으로써 사용자가 복잡한 해부구조를 가진 관절강 내부에서 가상 카메라를 자유롭게 이동시킬 수 있다. 이러한 고속 렌더링 방법과 현실감 있는 카메라 제어기법을 이용하여 대화식 가상 관절경을 개발하였다.

Keywords

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