CAJ | 학술논문

在虚拟手术系统模型中，特别是脑外科手术中，由于背景图像色彩的非规则性和非均匀性，导致对脑部损伤区域的手术入刀切割点的定位不准，影响手术精度和效果。传统方法采用损伤区域差异特征信息提取方法实现入刀点定位，对脑部特征二维灰度图片缺陷边界的定位效果不佳。提出一种基于背景差分法的虚拟手术损伤区入刀点定位算法，构建了虚拟手术的总体结构模型，将背景图像和人体软组织目标图像划分为多个子块，基于直方图选择阈值对差分图像序列进行二值化，得到高斯虚拟人体器官解析模型。设计医学图像分割算法，采用背景差分技术确定手术器械与软组织发生碰撞的激励因子，快速获取碰撞点，实现对虚拟手术入刀点的准确定位。实验结果表明，采用该算法实现虚拟手术系统设计和图像重构，对手术过程中器官损伤区域切割入刀点定位准确，性能优越，视景效果较好，计算时间缩短，精度提高。
재허의수술계통모형중，특별시뇌외과수술중，유우배경도상색채적비규칙성화비균균성，도치대뇌부손상구역적수술입도절할점적정위불준，영향수술정도화효과。전통방법채용손상구역차이특정신식제취방법실현입도점정위，대뇌부특정이유회도도편결함변계적정위효과불가。제출일충기우배경차분법적허의수술손상구입도점정위산법，구건료허의수술적총체결구모형，장배경도상화인체연조직목표도상화분위다개자괴，기우직방도선택역치대차분도상서렬진행이치화，득도고사허의인체기관해석모형。설계의학도상분할산법，채용배경차분기술학정수술기계여연조직발생팽당적격려인자，쾌속획취팽당점，실현대허의수술입도점적준학정위。실험결과표명，채용해산법실현허의수술계통설계화도상중구，대수술과정중기관손상구역절할입도점정위준학，성능우월，시경효과교호，계산시간축단，정도제고。
In the virtual operation system model, especially in the department of cerebral surgery operation, due to irregular background image color and non uniformity, resulting in inaccurate positioning on the brain injury region operation into the knife cutting point, influence the accuracy and the effect of operation. The damage of regional difference of feature informa?tion extraction methods to achieve the traditional method into the knife point positioning, positioning effect on brain fea?tures of 2D gray image defect boundary is poor. A knife point positioning technology of virtual operation damage zone is pro?posed based on background difference method, the virtual human organ model is obtained. Medical image segmentation al?gorithm is designed, using the background subtraction incentive factor operation instruments and soft tissue collision deter?mination technology, rapid access to the collision point, and realize the accurate positioning of the virtual operation into the knife point. The experimental results show that, using the algorithm for virtual operation system design and image recon?struction, the knife point positioning is accurate, it has superior performance, visual effects is better, it can shorten the time of calculating, improve the accuracy.