Image reconstruction algorithms for breast CT must deal with truncated projections and high noise levels. Recently, we have been investigating a design of iterative image reconstruction algorithms that employ a differentiation filter on the projection data and estimated projections. The extra processing step can potentially reduce the impact of artifacts due to projection truncation in addition to enhancing edges in the reconstructed volumes. The edge enhancement can improve visibility of various tissue structures. Previously, this idea has been incorporated in an approximate solver of the associated optimization problem. In the present work, we present reconstructed volumes with clinical breast CT data, which result from accurate solution of this optmization problem. Furthermore, we employ singular value decomposition (SVD) to help determine filter parameters and to interpret the properties of the reconstructed volumes.

Date Published: 18 March 2015
PDF: 5 pages
Proc. SPIE 9412, Medical Imaging 2015: Physics of Medical Imaging, 94123I (18 March 2015); doi: 10.1117/12.2082444

Published in SPIE Proceedings Vol. 9412:
Medical Imaging 2015: Physics of Medical Imaging
Christoph Hoeschen; Despina Kontos, Editor(s)