Fully iterative scatter corrected digital breast tomosynthesis using GPU-based fast Monte Carlo simulation and composition ratio update

Medical Physics
Kyung Sang KimJong Chul Ye

Abstract

In digital breast tomosynthesis (DBT), scatter correction is highly desirable, as it improves image quality at low doses. Because the DBT detector panel is typically stationary during the source rotation, antiscatter grids are not generally compatible with DBT; thus, a software-based scatter correction is required. This work proposes a fully iterative scatter correction method that uses a novel fast Monte Carlo simulation (MCS) with a tissue-composition ratio estimation technique for DBT imaging. To apply MCS to scatter estimation, the material composition in each voxel should be known. To overcome the lack of prior accurate knowledge of tissue composition for DBT, a tissue-composition ratio is estimated based on the observation that the breast tissues are principally composed of adipose and glandular tissues. Using this approximation, the composition ratio can be estimated from the reconstructed attenuation coefficients, and the scatter distribution can then be estimated by MCS using the composition ratio. The scatter estimation and image reconstruction procedures can be performed iteratively until an acceptable accuracy is achieved. For practical use, (i) the authors have implemented a fast MCS using a graphics processing uni...Continue Reading

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Citations

Jul 1, 2017·Physics in Medicine and Biology·Alejandro Rodríguez-RuizIoannis Sechopoulos
Apr 13, 2017·Journal of Medical Imaging·Gongting WuJianping Lu
Aug 15, 2019·Medical Physics·Oliver DiazDavid R Dance
Dec 10, 2020·Physics in Medicine and Biology·E MarimónO Díaz

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