Fig. 1. Imaging geometry and reconstruction principle. (a) System imaging geometry; (b) separation and reconstruction after shift

Fig. 2. Flowchart of using WASOBI in BSS to separate focusing plane

Fig. 3. DBT imaging system. (a) Hologic DBT system;(b) UPenn breast model; (c) plastic sheet

Fig. 4. Visual effects of reconstruction slice 7 obtained by different algorithms

Fig. 5. Visual effects of reconstruction slice 53 obtained by different algorithms

Fig. 6. Comparison of reconstruction visual effects of small metal ball focusing plane

Fig. 7. Artifact of small metal ball in other reconstruction slices

Fig. 8. Diffusion of small metal ball artifacts

Fig. 9. Reconstruction effects provided by DBT manufacturer and small metal ball artifact situation