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Dual-energy X-ray phase-contrast imaging device and implementation method thereof

A phase-contrast imaging and X-ray technology, applied in the field of X-ray imaging, can solve problems such as the limitation of the use range, and achieve the effect of expanding the application range

Active Publication Date: 2014-11-05
UNIV OF SCI & TECH OF CHINA
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the scope of application of current dual-energy X-ray phase contrast imaging technology is limited

Method used

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  • Dual-energy X-ray phase-contrast imaging device and implementation method thereof
  • Dual-energy X-ray phase-contrast imaging device and implementation method thereof
  • Dual-energy X-ray phase-contrast imaging device and implementation method thereof

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0050] The technical idea adopted in the present invention is to construct a dual-energy X-ray phase contrast imaging device with a large-period grating of 40 to 100 microns, extract the phase contrast image of the sample with the help of the moiré fringes generated by the geometric projection of the grating, and then implement the dual-energy X-ray phase contrast imaging device. Radiographic phase contrast imaging.

[0051] figure 1 It is a schematic diagram of the optical path of the dual-energy X-ray phase contrast imaging device provided by the present invention, which sequentially includes an X-ray machine 1, a source grating 2, a beam splitting grating 3, a sample chamber 4, an analysis grating 5 and an X-ray detect...

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Abstract

The invention discloses a dual-energy X-ray phase-contrast imaging device and an implementation method thereof. The dual-energy X-ray phase-contrast imaging device comprises an X-ray apparatus, a source grating, a beam splitting grating, a sample chamber, an analysis grating and an X-ray detector along an optical path sequentially, wherein the X-ray apparatus is used for sending out X-rays; the source grating is used for dividing a large-focus X-ray source into a plurality of independent small-focus optical sources; the beam splitting grating is used for dividing the small-focus optical sources into a plurality of beams which irradiate a sample in the sample chamber, and a geometric projection is formed on the analysis grating; the sample chamber is used for holding and fixing the sample, and driving the sample to rotate at the same time; the analysis grating is used in cooperation with the beam splitting grating for forming moire fringes on the X-ray detector; the X-ray detector is used for obtaining and recording the moire fringes. When the dual-energy X-ray phase-contrast imaging device is utilized for dual-energy X-ray phase-contrast imaging, two selected energy values, namely V (high energy) and V (low energy) can be freely adjusted based on the actual situation, so that the usable range of dual-energy X-ray phase-contrast imaging can be widened.

Description

technical field [0001] The invention relates to the technical field of X-ray imaging, in particular to a dual-energy X-ray phase contrast imaging device and a realization method thereof. Background technique [0002] Dual-energy X-ray imaging technology based on traditional absorption contrast has been widely used in clinical medicine. Dual-energy X-ray bone density measuring instrument is the most accurate and valuable method for osteoporosis diagnosis [1，2] . Dual-energy X-ray CT imaging technology can remove bone tissue or soft tissue from the X-ray image to obtain an image containing only soft tissue or bone tissue, which can facilitate medical diagnosis. Dual-energy subtraction X-ray angiography (using iodine contrast agent) can remove bone, muscle and other tissues, leaving only clear images of simple blood vessels, thus providing more accurate diagnostic information and allowing safer interventions Operation [3，4] . However, for weakly absorbing substances compos...

Claims

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Application Information

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IPC IPC(8): G01N23/087A61B6/00
Inventor 吴自玉王圣浩胡仁芳韩华杰张灿王志立高昆
Owner UNIV OF SCI & TECH OF CHINA
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