Interlayer artifact suppression method and device for mammary gland tomographic reconstruction image

Abstract

The invention relates to an interlayer artifact suppression method and device for a mammary gland tomographic reconstruction image, computer equipment and a storage medium. The interlayer artifact suppression method comprises the following steps: acquiring projection images of a scanned object at different angles, and performing primary reconstruction to obtain an initial reconstructed image; extracting a three-dimensional space mask of the high-density substance and a feature image of the high-density substance according to the initial reconstructed image; respectively mapping the three-dimensional space masks of the high-density substance, and combining the feature information of the projection image to obtain two-dimensional projection masks of the high-density substance of the projection image at different angles; obtaining an artifact weight image according to the two-dimensional projection mask and the pixel information of the projection image; performing weighted back projectionreconstruction on the projection image and the artifact weight image at different angles to obtain a reconstructed base image; and performing fusion processing on the reconstructed base image and thefeature image of the high-density substance to obtain a tomosynthesis reconstructed image after artifact suppression. According to the scheme, the quality of the reconstructed image can be improved.

Description

technical field [0001] The present application relates to the technical field of digital mammography, in particular to a method, device, computer equipment and storage medium for suppressing interlayer artifacts of breast tomographic reconstruction images. Background technique [0002] With the development of mammography technology, digital breast tomosynthesis technology (Digital BreastTomosynthesis, DBT) has emerged, which is based on digital mammography (Digital Mammography, DM), combined with the development of existing semiconductor detectors and digital Font layer synthesis technology, through the limited-angle rotation of the tube, and the projection data obtained by low-dose exposure of several angles to the compressed breast to reconstruct fine breast tomographic images of multiple horizontal layers. [0003] However, due to the limitation of tube exposure in the limited angle range during DBT acquisition, it is impossible to obtain enough projection information to ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitation of tube exposure in the limited angle range during DBT acquisition, it is impossible to obtain enough projection information to reconstruct tomographic images similar to CT. The interference of the high-density material projection produces interlayer artifacts, which often appear in the layers near the high-density material, and the longitudinal layer can be manifested as radial artifacts

Partial interference of interlayer artifacts on breast tissue details will reduce the Z-axis resolution of breast tomographic reconstruction images and affect image quality

Images