动脉自旋标记(ASL)MR图像信噪比低,需要重复采集多次以获得高质量的血流(CBF)图。临床中通常使用3D高斯滤波降低噪声但效果不佳。......

The nonlocal means( NLM) has been widely used in image processing. In this paper,we introduce a modified weight function......