X-ray scatter correction method for dedicated breast computed tomography.

Medical Physics
Ioannis Sechopoulos

Abstract

To improve image quality and accuracy in dedicated breast computed tomography (BCT) by removing the x-ray scatter signal included in the BCT projections. The previously characterized magnitude and distribution of x-ray scatter in BCT results in both cupping artifacts and reduction of contrast and accuracy in the reconstructions. In this study, an image processing method is proposed that estimates and subtracts the low-frequency x-ray scatter signal included in each BCT projection postacquisition and prereconstruction. The estimation of this signal is performed using simple additional hardware, one additional BCT projection acquisition with negligible radiation dose, and simple image processing software algorithms. The high frequency quantum noise due to the scatter signal is reduced using a noise filter postreconstruction. The dosimetric consequences and validity of the assumptions of this algorithm were determined using Monte Carlo simulations. The feasibility of this method was determined by imaging a breast phantom on a BCT clinical prototype and comparing the corrected reconstructions to the unprocessed reconstructions and to reconstructions obtained from fan-beam acquisitions as a reference standard. One-dimensional profil...Continue Reading

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Citations

Jun 7, 2013·Physics in Medicine and Biology·Johan NuytsFreek J Beekman
Jul 2, 2015·Medical Physics·Antonio SarnoPaolo Russo
Mar 5, 2015·Medical Physics·Kimberly Kontson, Robert J Jennings
Apr 13, 2017·Journal of Medical Imaging·Gongting WuJianping Lu
Jul 6, 2019·Journal of Synchrotron Radiation·Renata LongoGiuliana Tromba
Jan 14, 2016·Physics in Medicine and Biology·Senthil RamamurthyIoannis Sechopoulos
Apr 25, 2018·Journal of X-ray Science and Technology·Jainil P ShahMartin P Tornai

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