Volume Manipulation Algorithms for Simulating Sophisticated Surgical Operations

• Main Authors: Deng ,An-Cheng, 鄧安成
• Other Authors: Ming-Dar Tsai
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/43694039358744683995

碩士 === 中原大學 === 資訊工程研究所 === 83 === In this thesis, we developed a data structure to represent boundaries of interested tissues in medical volume. For each voxel, we use a boundary pointer that points the next boundary of any kind of tissue in depth direction and a pointer to its reverse direction. By manipulating the boundary pointer data in voxel, we can simulate the operation for the hard tissue and the soft tissue that are associated with the hard tissue. We interpolate the correct position between two voxels by their values. Besides, using 3×3 sampling points that are determined from 2×3×3 neighboring voxels, we can obtain a quadratic approximated tissue surface on the voxel. Based the local quadric surfaces, our system can provide high quality images. We normalized the voxel value of every kind of tissue. That means we can move the sectioned anatomical structure to any place (of othervoxels) while need not to change the voxel values of the structure. By manipulating the boundary position data, we have developed the algorithms that allow the clinician to section the anatomical structure from various directions and move the sectioned structure to any place in spite of our 2(1/2)D boundary representation. We compute the new position of soft tissue simultaneously with the reposition of the hard tissue. We also provide the interactive environment to assist the sophisticated operations.