Measurements and simulations of scatter imaging as a simultaneous adjunct for screening mammography

Katie Kern; Laila Hassan; Lubna Peerzada; Mahboob Ur-Rehman; C. A. MacDonald

doi:10.1117/12.2082231

18 March 2015 Measurements and simulations of scatter imaging as a simultaneous adjunct for screening mammography

Katie Kern, Laila Hassan, Lubna Peerzada, Mahboob Ur-Rehman, C. A. MacDonald

Proceedings Volume 9412, Medical Imaging 2015: Physics of Medical Imaging; 941241 (2015) https://doi.org/10.1117/12.2082231
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

X-ray coherent scatter is dependent upon the molecular structure of the scattering material and hence allows differentiation between tissue types with potentially much higher contrast than conventional absorption-based radiography. Coherent-scatter computed tomography has been used to produce images based on the x-ray scattering properties of the tissue. However, the geometry for CT imaging requires a thin fan beam and multiple projections and is incommensurate with screening mammography. In this work we demonstrate progress in a developing a system using a wide slot beam and simple anti-scatter grid which is adequate to differentiate between scatter peaks to remove the fat background from the coherent scatter image. Adequate intensity in the coherent scatter image can be achieved at the dose commonly used for screening mammography to detect carcinoma surrogates as small as 2 mm in diameter. This technique would provide an inexpensive, low dose, simultaneous adjunct to conventional screening mammography to provide a localized map of tissue type that could be overlaid on the conventional transmission mammogram. Comparisons between phantom measurements and Monte Carlo simulations show good agreement, which allowed for detailed examination of the visibility of carcinoma under realistic conditions.

Citation Download Citation

Katie Kern, Laila Hassan, Lubna Peerzada, Mahboob Ur-Rehman, and C. A. MacDonald "Measurements and simulations of scatter imaging as a simultaneous adjunct for screening mammography", Proc. SPIE 9412, Medical Imaging 2015: Physics of Medical Imaging, 941241 (18 March 2015); https://doi.org/10.1117/12.2082231

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