Latest progresses in breast imaging using differential phase contrast technique pose the question how to fuse multiple information (yielded by the absorption, differential phase, and scattering signals) into a single,...
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Latest progresses in breast imaging using differential phase contrast technique pose the question how to fuse multiple information (yielded by the absorption, differential phase, and scattering signals) into a single, but more informative image for clinical diagnosis and evaluation. In this work, we propose an image fusion scheme based on the multiple-resolution (MR) framework. The three signals are first transformed into multiple bands presenting information at different frequency and then a two-step processing follows: section 3.2 an intra-band processing enhances the local signal-to-noise ratio using a novel noise estimation method and context modeling;section 3.3 an inter-band processing weights each band by considering their characteristics and contributions, as well as suppressing the global noise level. The fused image, which looks similar to conventional mammogram but with significantly enhanced detail features, is then reconstructed by inverse transform. This fused image is compatible with clinical settings and enables the radiologists to use their years of diagnosis experiences in mammography.
A synchrotron source such as available at the Canadian Light Source provides the ability to use a large number of imaging techniques. Computed tomography (CT) can be a extension of many X-ray imaging techniques. The a...
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A synchrotron source such as available at the Canadian Light Source provides the ability to use a large number of imaging techniques. Computed tomography (CT) can be a extension of many X-ray imaging techniques. The ability to turn two dimensional projections into three dimensional structures is a powerful method of data analysis. CT also allows the user to slice the data in any desired direction without the need to cut up the sample. Diffraction enhanced imaging (analyzer based imaging) uses a crystal to measure refraction of the sample which may give significantly larger contrast than absorption alone. Measurements typically involve make images at multiple positions of the analyzer crystal and then using the images to extract the absorption, refraction components. Multiple-image radiology increases the number of images and adds the ultra-small-angle scatter. This paper will discuss the practical and technical aspects of extending diffraction enhanced imaging (DEI) to three dimensions (DEI-CT). A combination of hardware and software is used to provide a stable x-ray beam for the duration of potentially long measurement times and thus enable measurement of good quality diffraction enhanced imaging computed tomography (DEI-CT) data.
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