摘要
传统ＣＴ需要全方位的投影像，层析摄影合成不需要全方位的投影像，但成像不清晰．频域反卷积影像法（ＦＤＤＩ）克服了传统层析摄影合成方法不清晰的缺点，但ＦＤＤＩ的计算量大，计算中零频率丢失．本文利用Ｖａｎｄｅｒｍｏｎｄｅ矩阵求逆的特性和我们提出的空间域图像移位消去法，可以用较少的计算量求解出卷积方程组，从而快速重建断层像．并用计算机仿真清晰重建了断层像，验证了方法的正确性．
Computerized Tomography needs projected images from all directions,while tomosynthesis doesn′t need the information from all directions,but its reconstruction image is indistinct.Frequency Domain Deconvolution Imaging(FDDI) overcomes this shortcoming,but FDDI′s calculation is large,and its zero frequency will be lost.In this paper,we solve convolution equation based on Vandermonde Matrix and the method of image displacement elimination in space domain that we propose,so that we can reconstruct sectional image quickly.We use computer simulation and obtain clear sectional image.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1999年第4期71-74,共4页
Acta Electronica Sinica
