Model Cutting and Reconstruction in A Surgical Simulation System

• Main Authors: Shih, Ming-Yu, 石明于
• Other Authors: Din-Chang Tseng
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/98779528101678513745

碩士 === 國立中央大學 === 資訊工程研究所 === 85 === We have proposed a surgical simulation system; the research topics in the the sisare parts of the system. There are three topics in this thesis: (i) geometr icalmodeling, (ii) cutting operations, and (iii) model reconstruction. At firs t, wepropose a method to construct a geometric model with triangulated irregul arsurface from many slices of color medical images. We sample points from colo rimages and make them a polygon to form the contour of an organ, and link each vertex in a polygon with points on another polygon in the adjacent image tocon struct a complete organ model. Secondly, we build a VR environment and put akn ife and into this environment and operate this knife to cut the model.Moreover , we discuss how to cut a model into two pieces according the knifelocation an d orientation and how to lacerate a breach in the surface of a organ.After cut ting operations, we need to reconstruct a triangles meshes to representthe cut surfaces. We propose an approach to find a jut from a non-convex polygonno ma tter what the contour of the polygon be lined in order or not. Thisprocedure w ill be executed iteratively until all triangles be found that thispolygon can be cut into many triangles in parts.