实现了三维超声PNN算法的GPU加速；实现GPU加速的CT圆轨道平板探测器FDK重建算法；提供对canny边缘检测算法的支持；提供交互式graph cut分割方法；实现OSTU分割算法；-Three dimensional ultrasound PNN algorithm GPU acceleration　to achieve GPU accelerated CT reconstruction algorithm for circular orbits FDK flat panel detector　provide support for canny edge detection algorithm　provide interactive graph cut segmentation　achieve OSTU segmentation