Three Dimensional Image Reconstruction By Digital Tomo-synthesis

X-ray tomo-synthesis with film can provide a sagittal slice image by a single scanning of measurement. Here we propose a reconstructing method for digital torn*synthesis. It utilizes a 3- dimensional convolution proceas with the inverse filter function which is derived analytically by the point spread function of the projection geometry. In this paper, by the phantom experiment and clinical eval- uation , it is also shown that the proposed algorithm is able to recon- struct the expected gray level corresponding with X-ray absorption coefficient and it can also reduce the artifacts from outside of focused slice.