Quantitative X-Ray Radiology Using the Absorption and Scattering Information

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This invention introduces a method and system for quantitative X-ray imaging by simultaneously capturing both absorption and small-angle scattering signals of an object, such as human tissue, using specialized imaging techniques like X-ray grating interferometry. By computing the ratio of these two signals (called the R image), the technique allows for the identification and discrimination of different materials, independent of their thickness, which is a significant limitation in traditional X-ray imaging. The method is exemplified by estimating volumetric breast density, but its use is not limited to medical applications.

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• Medical imaging for quantitative tissue characterization (e.g., determining volumetric breast density for cancer screening).
• Non-destructive testing in industrial applications (e.g., distinguishing between materials inside complex assemblies).
• Material science research for analyzing internal structures of samples.
• Quality control in manufacturing by identifying and verifying material composition without destruction.
• Histology and pathology studies where accurate, thickness-independent material identification is needed.

BenefitsContent extracted from patent full text and abstract with AI.

• Allows for material discrimination in X-ray imaging without prior calibration, regardless of object thickness.
• Provides quantitative imaging data instead of just qualitative (visual) information.
• Enables more accurate breast density measurement, supporting improved breast cancer risk assessment.
• Can be implemented using existing X-ray technology with appropriate grating-based or aperture modifications.
• Reduces subjectivity and improves reliability over traditional imaging methods, especially in medical diagnostics.
• Broadly applicable to other fields requiring non-invasive internal material analysis.

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Patent Abstract

The present invention proposes a quantitative radiographic method using X-ray imaging. This invention uses the ratio of the absorption signal and the (small-angle) scattering signal (or vice-versa) of the object as a signature for the materials. The ratio image (dubbed R image) is independent from the thickness of the object in a wide sense, and therefore can be used to discriminate materials in a radiographic approach. This invention can be applied to imaging systems, which can record these two signals from the underlying object (for instance, an X-ray grating interferometer). Possible applications of the suggested invention could be in material science, non-destructive testing and medical imaging. Specifically in this patent, we illustrate how this invention can be used to estimate the volumetric breast density. The use of the R image and the corresponding algorithm are also presented hereafter.