基于光照球索引的医学图像感兴趣区快速体绘制

Fast medical image ROI volume rending based on lit spheres

针对三维医学图像显示中感兴趣器官遮挡和快速真实体绘制的问题,提出一种感兴趣区体绘制方法,并在GPU(graphic processing unit)上实现。通过构造基于光照球索引的传递函数,实现感兴趣组织的风格化显示;通过交互设定感兴趣区域,用灰度和梯度信息生成的重要因子调节体素不透明度,强调感兴趣区域器官。实验结果显示了该方法在速度和显示效果上的优点。

To solve the common problem of occlusion of the ROI （regions of interest） and achieve fast illustrative volume rending of 3D medical imagery,proposed a novel volume rending method and implemented in GPU. It achieved style visualization by constructing transfer function with lit sphere. By interactively ROI setting and adjusting opacity according to gray level and gradient,it could also emphasis the important organ or tissues. Experiments show the improvement in both speed and rending eftect.