Novel method for extracting information of one-shot hard X-ray grating interferometer

Abstract

The invention discloses a novel method for extracting information of a one-shot hard X-ray grating interferometer. The novel method comprises the following steps that 1, any grating is moved, so that the hard X-ray grating interferometer works at the left half position or the right half position of a light intensity changing curve; 2, a background projection image and a projection image of an imaged object are obtained; 3, the normalized projection image of the imaged object is obtained and subjected to logarithm taking processing; 4, according to the logarithm result, an expression is constructed to carry out Fourier transform; 5, according to the Fourier transform result, inverse Fourier transform is utilized for extracting absorption and phase shift signals of the imaged object. According to the method, a tedious grating scanning procedure is abandoned, the image acquiring procedure of the hard X-ray grating interferometer is simplified, fast and low-radiation-dosage hard X-ray phase contrast imaging can be achieved, therefore, the imaging efficiency is improved, and a new way is provided for low-radiation-dosage clinical medical imaging.

Description

Technical field [0001] The invention relates to the field of X-ray imaging physics, in particular to a new method for extracting information from a single-exposure hard X-ray grating interferometer. Background technique [0002] Traditional X-ray imaging technology, including radiography and Computed Tomography (CT), is a huge contribution of modern science and technology to human health. Over the past 100 years, this technology has continuously made new progress in projection data collection and reconstruction theory, and has gradually developed into an indispensable tool in the fields of life medicine, materials science, archaeology, and industrial nondestructive testing. [0003] The physical basis of traditional X-ray imaging technology is the difference in X-ray absorption properties of objects. Therefore, when imaging objects composed of heavy elements such as metals and bones, high image contrast can be obtained and clear images can be obtained. However, human soft tissues...

AI Technical Summary

Problems solved by technology

This not only leads to very long image data acquisition time, but more seriously, multiple exposures increase the radiation dose of the object and the chance of radiation damage

This is contradictory to the development trend of fast and low radiation dose of X-ray imaging equipment, which hinders the popularization and application of hard X-ray grating interferometer method in clinical medical diagnosis and other fields

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