X-ray phase-contrast imaging system and imaging method

An X-ray imaging method, comprising:

• sequentially generating, by X-ray sources of a distributed incoherent X-ray source arrangement, X-rays to emit X-rays to an object to be detected;
• each time the distributed incoherent X-ray source arrangement emits X-rays, forming an X-ray signal with varying intensities from the X-rays, which are refracted by the object to be detected and then pass through a first absorption grating and a second absorption grating;
• by an X-ray detecting device, receiving the X-ray signal with varying intensities and converting the received X-ray signal into an electrical signal;
• acquiring, from the converted electrical signal in a multi-period sampling manner, refraction angle information when the X-rays passed through the object, and obtaining pixel values of the object according to a predetermined algorithm;
• and
• reconstructing an image of the object to be detected from the obtained pixel values.

An X-ray imaging method, which performs X-ray imaging of an object by using an X-ray imaging system, wherein the X-ray imaging system comprises:

• a distributed incoherent X-ray source arrangement, a fixed grating module, an X-ray detecting device and a computer workstation, the X-ray imaging method comprising the following steps:
• sequentially generating, by X-ray sources of the distributed X-ray source arrangement, X-rays to emit X-rays to an object to be detected;
• for each exposure, receiving the X-rays by the X-ray detecting device, wherein after a series of stepping exposures of the distributed X-ray source arrangement and corresponding data acquisitions, at each pixel of the X-ray detecting device, X-ray intensities are represented as an intensity curve;
• comparing the intensity curve at each pixel spot on the X-ray detecting device to an intensity curve in the absence of the object to be detected, and obtaining a pixel value at each pixel from a variation of the intensity curves;
• and
• reconstructing an image of the object to be detected according to the obtained pixel values.