Method for reducing high-density object artifacts in limited view angle tomography

The invention discloses a method for reducing high-density object artifacts in limited visual angle tomography. The method comprises the steps that an X-ray emitter and an X-ray receiver are placed on and below target tissue respectively; using an X-ray emitter to move around the tissue within a limited angle and collecting projection data; taking the zero matrix as a background value in an initial iterative algorithm; on the basis of a set background value, independently updating a reconstructed image obtained by the last iteration at each scanning angle according to an improved SART algorithm, and storing the updated image data; traversing the updated and stored image data at all scanning angles, selecting a non-zero minimum value of a corresponding position in the reconstructed image at each scanning angle for each voxel point, and if all the non-zero minimum values are zero, taking zero as a final result of iteration of the voxel; taking the final result of the current iteration as a background value used