CAJ | 학술논문

软组织模型的切割是虚拟手术中的一个重要组成部分，传统切割方法的重点在于用较短的时间将网格进行分裂，这样往往忽略了切割后网格单元的质量，为后续的变形计算埋下了隐患。本文提出了改进切割方法，按照切割交点与其周围四面体单元的拓扑关系，采用光顺性规则对切割交点和相邻单元进行调整，提高了网格的质量。基于肝脏四面体模型的切割结果表明，与传统的最少单元法相比，改进后的切割方法在满足虚拟手术实时性要求的同时，能够有效地提高切割后网格单元的质量。
연조직모형적절할시허의수술중적일개중요조성부분，전통절할방법적중점재우용교단적시간장망격진행분렬，저양왕왕홀략료절할후망격단원적질량，위후속적변형계산매하료은환。본문제출료개진절할방법，안조절할교점여기주위사면체단원적탁복관계，채용광순성규칙대절할교점화상린단원진행조정，제고료망격적질량。기우간장사면체모형적절할결과표명，여전통적최소단원법상비，개진후적절할방법재만족허의수술실시성요구적동시，능구유효지제고절할후망격단원적질량。
The soft-tissue-cutting plays an important role in the virtual surgery.The traditional cutting methods are fo-cused on dividing the mesh with a relatively short time,and in most cases the element quality of the resulting mesh is ig-nored which could bury some hidden troubles to subsequent deformation computations.In this paper,an improved element subdividing method is proposed.The mesh quality is modified by adj usting the positions of the cutting intersections and ad-jacent tetrahedral elements,based on the smoothing rules.Compared to the traditional minimal new element creation meth-od,our improved method demonstrates the better quality of the resulting meshes through several examples,while meeting the real-time demand.