CT成像的改进Fourier算法及其实验

Improved Fourier Algorithm of CT Imaging and Experiment

Ｆｏｕｒｉｅｒ算法是求解Ｒａｄｏｎ变换的一种方法，优点是计算量小，速度快，但因其成像质量较差，所以在医疗ＣＴ方面的应用较少。本文叙述了一种改进的Ｆｏｕｒｉｅｒ算法，并对其作了成像实验，实验结果表明改进Ｆｏｕｒｉｅｒ 算法的成像质量不低于国产ＣＴ所采用的卷积反投影算法，但在速度上却有很大优势。

Fourier algorithm is one of the methods for solving Radon transform. Its advantages lie in less operations and faster speed. But because of its poor imaging quality, this algorithm is seldom used in the medical CT field. This paper gives an improved Fourier algorithm and makes the imaging experiments. The result of experiments demonstrates that improved Fourier algorithm and filtered backprojection algorithm are of comparable quality.