Sparse angle CT image artifact suppression method based on structure enhancement and artifact estimation

The invention discloses a sparse angle CT image artifact suppression method based on structure enhancement and artifact estimation, and belongs to the technical field of computed tomography. The method comprises the following steps: constructing a structure enhancement artifact suppression network for sparse angle CT image processing, wherein the structure enhancement artifact suppression network mainly comprises an artifact feature extraction sub-network and a structure feature extraction sub-network which have the same network architecture; constructing an image restoration loss function and a structure loss function, jointly training each sub-network, and forming a trained structure enhancement artifact suppression network; and finally, inputting a sparse angle CT image to be processed into the trained structure-enhanced artifact suppression network by a user, and outputting a CT image after artifact suppression. Aiming at the problems that sparse angle CT image artifacts are complex and organization struc