Focus-detector arrangement for generating projective or tomographic phase contrast recordings

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This invention describes an improved focus-detector arrangement for X-ray machines used in phase contrast imaging. By customizing the phase grating with a special filler material in the gaps between its bars, the device ensures that X-rays passing through the bars and the fillers have exactly the same attenuation, but produce a controlled phase shift. This enhances the quality and accuracy of phase contrast X-ray imaging.

Use CasesContent extracted from patent full text and abstract with AI.

• Medical diagnostics using phase-contrast X-ray imaging, such as soft tissue imaging and early cancer detection
• High-resolution imaging in veterinary applications
• Non-destructive testing in materials science and engineering
• Research in biological samples where conventional X-ray methods may not provide sufficient contrast

BenefitsContent extracted from patent full text and abstract with AI.

• Provides enhanced image quality and contrast by precisely balancing attenuation and phase shift
• Allows for detailed visualization of soft tissues and low-density materials not easily seen with traditional X-ray imaging
• Improves accuracy and reliability in tomographic (3D) imaging and projective (2D) imaging
• Can be integrated into existing X-ray imaging setups with modifications to the grating system

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Patent Abstract

The invention relates to a focus-detector arrangement of an X-ray apparatus for generating projective or tomographic phase contrast recordings with a phase grating. According to the invention, in the gaps between its bars, a phase grating includes a filler material whose linear attenuation coefficient in the relevant energy range is greater than that of the bars. The height of the filler material in the gaps is dimensioned on the one hand so that the X-radiation with the energy used for measuring the phase shift generates a phase shift in the X-radiation such that, after the phase grating, the rays which pass through the bars are phase shifted by one half wavelength relative to the rays which pass through the gaps with the filler material. Further, the height of the filler material in the gaps on the other hand is dimensioned so that the attenuation of the X-radiation, at least in relation to the energy used for measuring the phase shift, is the same when passing through the bars and when passing through the filler material.