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０引言计算机断层摄影（ｃｏｍｐｕｔｅｒｔｏｍｏｇｒａｐｈｙＣＴ）作为一种能够清晰重现人体组织断层像的方法，在医疗诊断中被广泛采用。Ｘ线ＣＴ与传统Ｘ线诊断技术相比，图像的空间和密度分辨率产生了质的飞跃［１］。但常规的Ｘ线ＣＴ仍有一些局限性：其中最主要的...
0 Introduction Computed tomography (CT) as a method that can clearly reproduce tomographic images of human tissues is widely used in medical diagnosis. X-ray CT compared with the traditional X-ray diagnostic techniques, the image space and density resolution has made a qualitative leap [1]. However, conventional X-ray CT still has some limitations: one of the most important ...