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Proceedings Paper

Filtered back-projection for digital breast tomosynthesis with 2D filtering
Author(s): Sean D. Rose; Emil Y. Sidky; Ingrid S. Reiser; Xiaochuan Pan
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Paper Abstract

Designing image reconstruction algorithms for Digital Breast Tomosynthesis (DBT) has attracted much attention in recent years as the modality is increasingly employed for mammographic screening. While much recent research on this has focused on iterative image reconstruction, there may still be fundamental aspects of DBT image quality that can be addressed and improved with analytic filtered back-projection (FBP). In particular, we have been investigating conspicuity of fiber-like signals that can model blood vessels, ligaments, or spiculations. The latter structures can indicate a malignant tumor. It is known that the visual appearance of fiber-like signals varies with fiber orientation in the DBT slice images, and recently we have sought to quantify this orientation dependence with simulations involving phantoms with fibers placed at various angles with respect to the direction of the X-ray source travel (DXST). Employing FBP with a standard Hanning filter results in a marked decrease in conspicuity of fibers aligned nearly parallel with the DXST. Employing DBT-specific FBP filters proposed in the literature recovers conspicuity of such fibers. In this work, we propose a different modification to the FBP filter where the standard Hanning filter is combined with the same filter – but rotated 90° – forming a 2D filter. We illustrate the potential advantages of this new FBP filter design for DBT image reconstruction.

Paper Details

Date Published: 1 March 2019
PDF: 4 pages
Proc. SPIE 10948, Medical Imaging 2019: Physics of Medical Imaging, 1094851 (1 March 2019); doi: 10.1117/12.2513342
Show Author Affiliations
Sean D. Rose, Univ. of Wisconsin-Madison (United States)
Emil Y. Sidky, The Univ. of Chicago Medical Ctr. (United States)
Ingrid S. Reiser, The Univ. of Chicago Medical Ctr. (United States)
Xiaochuan Pan, The Univ. of Chicago Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 10948:
Medical Imaging 2019: Physics of Medical Imaging
Taly Gilat Schmidt; Guang-Hong Chen; Hilde Bosmans, Editor(s)

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