Digital breast tomosynthesis reconstruction with an adaptive voxel grid

Bernhard Claus; Heang-Ping Chan

doi:10.1117/12.2043541

19 March 2014 Digital breast tomosynthesis reconstruction with an adaptive voxel grid

Bernhard Claus, Heang-Ping Chan

Proceedings Volume 9033, Medical Imaging 2014: Physics of Medical Imaging; 90335A (2014) https://doi.org/10.1117/12.2043541
Event: SPIE Medical Imaging, 2014, San Diego, California, United States

Abstract

In digital breast tomosynthesis (DBT) volume datasets are typically reconstructed with an anisotropic voxel size, where the in-plane voxel size usually reflects the detector pixel size (e.g., 0.1 mm), and the slice separation is generally between 0.5-1.0 mm. Increasing the tomographic angle is expected to give better 3D image quality; however, the slice spacing in the reconstruction should be reduced, otherwise one may risk losing fine-scale image detail (e.g., small microcalcifications). An alternative strategy consists of reconstructing on an adaptive voxel grid, where the voxel height at each location is adapted based on the backprojected data at this location, with the goal to improve image quality for microcalcifications. In this paper we present an approach for generating such an adaptive voxel grid. This approach is based on an initial reconstruction step that is performed at a finer slice-spacing combined with a selection of an “optimal” height for each voxel. This initial step is followed by a (potentially iterative) reconstruction acting now on the adaptive grid only.

Citation Download Citation

Bernhard Claus and Heang-Ping Chan "Digital breast tomosynthesis reconstruction with an adaptive voxel grid", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 90335A (19 March 2014); https://doi.org/10.1117/12.2043541

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