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Proceedings Paper

Monte Carlo simulation of x-ray scatter based on patient model from digital breast tomosynthesis
Author(s): Bob Liu; Tao Wu; Richard H. Moore; Daniel B. Kopans
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Paper Abstract

We are developing a breast specific scatter correction method for digital beast tomosynthesis (DBT). The 3D breast volume was initially reconstructed from 15 projection images acquired from a GE prototype tomosynthesis system without correction of scatter. The voxel values were mapped to the tissue compositions using various segmentation schemes. This voxelized digital breast model was entered into a Monte Carlo package simulating the prototype tomosynthesis system. One billion photons were generated from the x-ray source for each projection in the simulation and images of scattered photons were obtained. A primary only projection image was then produced by subtracting the scatter image from the corresponding original projection image which contains contributions from the both primary photons and scatter photons. The scatter free projection images were then used to reconstruct the 3D breast using the same algorithm. Compared with the uncorrected 3D image, the x-ray attenuation coefficients represented by the scatter-corrected 3D image are closer to those derived from the measurement data.

Paper Details

Date Published: 2 March 2006
PDF: 9 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61421N (2 March 2006); doi: 10.1117/12.650193
Show Author Affiliations
Bob Liu, Massachusetts General Hospital (United States)
Tao Wu, Massachusetts General Hospital (United States)
Richard H. Moore, Massachusetts General Hospital (United States)
Daniel B. Kopans, Massachusetts General Hospital (United States)

Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

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