Phase contrast imaging method and device, equipment and storage medium

A phase-contrast imaging and phase-contrast image technology, applied in the field of imaging, can solve the problems of reducing system stability, increasing imaging time of X-ray imaging system, and low spatial resolution, so as to achieve the effect of improving accuracy and resolution

Pending Publication Date: 2022-05-06
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Application Information

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Benefits of technology

This patented technology allows for creation of multiple virtual stepped projections that correspond with different phases during imagery captured from one camera sensor's perspective or other sensors. These images have been previously analyzed to determine their properties such as materials used (material characteristics) and how they look like at certain angles within them. They then use this knowledge to optimize the projector settings to improve its performance over time without sacrificing detail when it captures detailed 360 degree views.

Problems solved by technology

This patents describes different ways for improving the accuracy or efficiency of x ray tomography systems used during medical procedures like surgery. These improvements include improved stability over long periods without causing any issues related to motion caused by the use of gratings, reduced doses needed while still maintaining good results.

Method used

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  • Phase contrast imaging method and device, equipment and storage medium
  • Phase contrast imaging method and device, equipment and storage medium
  • Phase contrast imaging method and device, equipment and storage medium

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Embodiment 1

[0030] figure 1 It is a flowchart of a phase contrast imaging method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation when phase contrast imaging is performed. The method can be performed by a phase contrast imaging device, which can be implemented in software and / or hardware, for example, the phase contrast imaging device can be configured in a computer device. Such as figure 1 As shown, the method includes:

[0031] S110. Obtain a single-step projection map corresponding to a single phase step projection data, and obtain multiple virtual step projection maps of virtual steps based on the single-step projection map.

[0032] In this embodiment, the target phase contrast image can be obtained only by collecting the projection data of a single phase step. Optionally, after obtaining the single-step projection map, the single-step projection map is translated in space to obtain multiple virtual step projection maps of virtual ...

Embodiment 2

[0043] figure 2 It is a flowchart of a phase contrast imaging method provided by Embodiment 2 of the present invention. This embodiment is further optimized on the basis of the above solutions. Such as figure 2 As shown, the method includes:

[0044] S210. Obtain a sample projection map, and obtain a plurality of sample step projection maps of the virtual step based on the sample projection map.

[0045] In this embodiment, a projection map corresponding to a single phase step projection data is acquired as a sample projection map, and a training sample of an information extraction model is generated based on the sample projection map. Specifically, the sample projection map is translated in space to obtain multiple sample step projection maps of virtual steps. For the manner of spatially translating the sample projection diagram, refer to the manner of spatially translating the single-step projection diagram in the above-mentioned embodiments, which will not be repeated...

Embodiment 3

[0059] This embodiment provides a preferred embodiment on the basis of the foregoing embodiments. In this embodiment, the extracted phase information is optimized by training the information extraction model. specific, Figure 3a It is a schematic diagram of the training flow of an information extraction model for phase contrast imaging provided by Embodiment 3 of the present invention. Such as Figure 3a As shown, the method includes:

[0060] S310. Obtain a multi-step composite projection map of the sample in multiple steps based on the single sample projection map.

[0061] Figure 3b It is a schematic diagram of generating the multi-step composite projection map of the sample provided by Embodiment 3 of the present invention. Such as Figure 3b As shown, firstly, for a single sample projection map Translate in space to obtain multiple virtual step sample step projection maps, and use the least square method on the sample step projection maps to recover the correspo...

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Abstract

The embodiment of the invention discloses a phase contrast imaging method, device and equipment and a storage medium, and the method comprises the steps: obtaining a single-step projection drawing corresponding to single phase stepping projection data, and obtaining a plurality of virtual stepping projection drawings based on the single-step projection drawing; extracting material characteristic parameters of the virtual stepping projection drawing, and obtaining a multi-step synthetic projection drawing according to the material characteristic parameters of the virtual stepping projection drawing and the multi-step background phase information; inputting the multi-step synthetic projection drawing into a trained information extraction model to obtain optimized phase information output by the information extraction model; and generating a target phase contrast image according to the material characteristic parameters and the optimized phase information. According to the embodiment of the invention, virtual stepping is carried out on the single-step projection drawing to extract the phase information, the phase information can be recovered only through the single projection drawing containing the object, and the phase information is optimized based on the trained information extraction model, so that the accuracy and resolution of optimizing the phase information are improved.

Description

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Claims

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Application Information

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Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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