Single-exposure multi-mode X-ray imaging method based on three-detector grating interferometer

Abstract

The invention discloses a single-exposure multi-mode X-ray imaging method based on a three-detector grating interferometer. An X-ray source, a phase grating, a first detector and a second detector are sequentially arranged along the Z axis. A three-detector grating interferometer formed with the third detector; and centered along the Y axis; wherein, the working point of the first detector is fixed at the peak of the light intensity curve; the working point of the second detector is fixed At the waist of the light intensity curve; the working point of the third detector is fixed at the valley of the light intensity curve; thereby using the images acquired by the first detector, the second detector and the third detector to extract the absorption of the imaged object , refraction and dark field signals. The invention can solve the problem of accurate extraction of the refraction signal and the dark field signal of the imaged object under low photon counting, thereby providing a new way for the development of fast, accurate and low radiation dose multi-mode X-ray imaging technology.

Description

technical field

[0001] The invention relates to the field of X-ray imaging methods, in particular to a single-exposure multi-mode X-ray imaging method based on a three-detector grating interferometer. Background technique

[0002] In recent years, as a powerful supplement to traditional X-ray absorption imaging technology, X-ray refraction imaging and dark-field imaging methods have been developed rapidly, and their potential application value in clinical medical diagnosis and treatment, public security inspection and other fields has attracted increasing attention . In particular, the multi-mode X-ray imaging based on the grating interferometer can simultaneously obtain the absorption, refraction and dark field signals of the imaged object from a set of experimental data. The three different signals complement each other and can simultaneously reflect the difference in mass density and charge density of the imaged object, as well as the spatial distribution information of ...

Examples

Embodiment Construction

[0044] In this example, see figure 1 and figure 2 , the single-exposure multi-mode X-ray imaging method based on a three-detector grating interferometer is to set up an X-ray source 1, a phase grating 2, a first detector 3, a second detector 4 and a third detector 5. Three-detector grating interferometer; the working point of the first detector is fixed at the peak of the light intensity curve, and the background projection image and the imaged object projection image are obtained respectively; the working point of the second detector is fixed at the peak of the light intensity curve Waist position, respectively acquire the background projection image and the imaged object projection image; fix the working point of the third detector at the valley position of the light intensity curve, respectively obtain the background projection image and the imaged object projection image; thus use the acquired image to extract Absorption, refraction and dark field signals of the imaged o...

technical field

[0001] The invention relates to the field of X-ray imaging methods, in particular to a single-exposure multi-mode X-ray imaging method based on a three-detector grating interferometer. Background technique

[0002] In recent years, as a powerful supplement to traditional X-ray absorption imaging technology, X-ray refraction imaging and dark-field imaging methods have been developed rapidly, and their potential application value in clinical medical diagnosis and treatment, public security inspection and other fields has attracted increasing attention . In particular, the multi-mode X-ray imaging based on the grating interferometer can simultaneously obtain the absorption, refraction and dark field signals of the imaged object from a set of experimental data. The three different signals complement each other and can simultaneously reflect the difference in mass density and charge density of the imaged object, as well as the spatial distribution information of ...

Examples

Embodiment Construction

[0044] In this example, see figure 1 and figure 2 , the single-exposure multi-mode X-ray imaging method based on a three-detector grating interferometer is to set up an X-ray source 1, a phase grating 2, a first detector 3, a second detector 4 and a third detector 5. Three-detector grating interferometer; the working point of the first detector is fixed at the peak of the light intensity curve, and the background projection image and the imaged object projection image are obtained respectively; the working point of the second detector is fixed at the peak of the light intensity curve Waist position, respectively acquire the background projection image and the imaged object projection image; fix the working point of the third detector at the valley position of the light intensity curve, respectively obtain the background projection image and the imaged object projection image; thus use the acquired image to extract Absorption, refraction and dark field signals of the imaged o...

Images