基于VTK的虚拟心脏切面交互式可视化方法

为解决传统医学影像技术方向性单一的问题,满足临床医学从不同方位从整体或切面等多角度对器官组织进行观察分析的需求,提出了心脏核磁共振成像(MRI)数据的体可视化和任意角度切面的可视化方法.基于可视化工具包VTK,在VC6.0开发环境中,运用光线投射算法设计并实现了MRI羊心脏切片数据的三维体绘制,横断、冠状、矢状位置的标准切片、切面以及任意角度、任意位置切面的绘制技术.通过简单的鼠标操作就可以实时的对切面进行移动、旋转、缩放等交互操作.实验结果表明:该方法有助于医生从多个方位观察整体器官组织和切面形态.在疾病预防、医疗诊断、手术方案制定以及术后评价中具有较大的实用价值.

VTK based interactive visualization of virtual heart

To solve the fixed direction problemin traditional medical imaging technologies and satisfy the clinical medicine requirement of observing the organ in term of the whole or sections from different viewpoints,a three dimensional visualization method of the cardiac MRI data to display the whole heart volume and the arbitrary-cut sections is proposed.Using VC6.0 and VTK,the ray casting method is adopted to realize the threedimensional visualization of total and partial cardiac MRI data and the virtual sections from arbitrary viewpoint.Simple interactive operations such as scaling,translation and rotation can be realized in real time.The experimental results show that the presented method can assist doctors to observe the organ tissue and sections from different viewpoints,which is valuable in disease prevention,medical diagnosis,surgical planning and postoperative evaluation.