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- W1987702931 abstract "ABSTRACT Cone beam breast CT technique provides true three dimensional (3D) images of breast anatomy; however the detectability of calcificati on is limited due to low exposure levels on each projection. In this study, we investigated the possibility of using anisotropic exposure distributions to improve the visibility of calcifications in the breast CT images. Our approach was to measure the CBCT projections with is otropic high and low exposures separately. Reconstruction was performed upon different combinations of these two sets of projection sequences to investigate the visibility change due to the limited-angle high exposure projections. Our prelimin ary results show that the visibility is improved with the number of high exposure projections in the combinations. In the future we will measure the CBCT projections with anisotropic exposures while keeping the total exposure constant. Keywords: visibility study, micro-calcification, cone beam CT, x-ray imaging physics 1. INTRODUCTION" @default.
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- W1987702931 date "2009-02-26" @default.
- W1987702931 modified "2023-09-25" @default.
- W1987702931 title "Calcification visibility study using combined high dose and low dose cone beam CT projections" @default.
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- W1987702931 doi "https://doi.org/10.1117/12.813780" @default.
- W1987702931 hasPublicationYear "2009" @default.
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