Calcification visibility study using combined high dose and low dose cone beam CT projections

Y, Zhong; C. J. Lai; L. Chen; T. Han; Y. Shen; X. Liu; T. Wang; S. Ge; Y. Yi; Z. You; C. C. Shaw

doi:10.1117/12.813780

13 March 2009 Calcification visibility study using combined high dose and low dose cone beam CT projections

Y, Zhong, C. J. Lai, L. Chen, T. Han, Y. Shen, X. Liu, T. Wang, S. Ge, Y. Yi, Z. You, C. C. Shaw

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 72585U (2009) https://doi.org/10.1117/12.813780
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

Cone beam breast CT technique provides true three dimensional (3D) images of breast anatomy; however the detectability of calcification 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 isotropic 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 preliminary 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.

Citation Download Citation

Y, Zhong, C. J. Lai, L. Chen, T. Han, Y. Shen, X. Liu, T. Wang, S. Ge, Y. Yi, Z. You, and C. C. Shaw "Calcification visibility study using combined high dose and low dose cone beam CT projections", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72585U (13 March 2009); https://doi.org/10.1117/12.813780

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