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Multi-layer X-ray detector image processing method and terminal

An image processing and X-ray technology, applied in the field of image processing, can solve problems such as motion artifacts and increased radiation dose, and achieve the effects of improving photon utilization, reducing absorbed dose, and clear acquisition

Active Publication Date: 2020-11-24
SHENZHEN ANGELL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional multi-energy detection technology makes the ball tube emit rays of different kV in the process of collecting multi-energy images, and respectively collects multi-energy images corresponding to kV. When taking chest X-rays, the chest will rise and fall with breathing), there are motion differences in the multi-energy images, and motion artifacts will appear after dual-energy subtraction of the images, and multiple acquisitions of images will also increase the radiation dose

Method used

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  • Multi-layer X-ray detector image processing method and terminal
  • Multi-layer X-ray detector image processing method and terminal
  • Multi-layer X-ray detector image processing method and terminal

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Experimental program
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Embodiment 1

[0080] Please refer to figure 1 and image 3 , Embodiment 1 of the present invention is:

[0081] A multi-layer X-ray detector image processing method, which can be used in this embodiment image 3 The shown multi-layer X-ray detector can set the kV value of the X-ray emitted by it, and another X-ray tube 1 emits X-rays with a corresponding kV value, and the X-ray reaches the multi-layer X-ray after passing through the object 3 to be measured. Ray detector 2, the multi-layer X-ray detector 2 converts X-rays into visible light through the scintillator in the upper (low-energy) detector 2-1, and then collects electrons through photoelectric conversion to obtain low-energy images; residual X-rays pass through and filter Layer 2-2 is converted into high-energy X-rays, and passes through the lower layer (high-energy) detector 2-3 to obtain a high-energy image; specifically includes:

[0082] S1. Obtain a multi-energy image of the object to be measured, where the multi-energy ima...

Embodiment 2

[0118] A multi-layer X-ray detector image processing method, which differs from Embodiment 1 in that: for image 3 A multi-layer X-ray detector shown can continue to add a filter layer similar to 2-2 and a detector of 2-3 under the lower layer detector 2-3 in the multi-layer X-ray detector 2, by changing The composition of the filter layer realizes the generation of X-rays with different energies, thereby realizing the acquisition of multi-energy images;

[0119] The S1 includes: passing X-rays through a multi-layer X-ray detector to obtain high-energy images, medium-energy images and low-energy images;

[0120] The S2 is specifically:

[0121] Obtain the high-energy image I after logarithmic transformation log_h , the middle energy image I after logarithmic transformation log_m and the low-energy image I after logarithmic transformation log_l；

[0122] to the I log_h , the I log_m and the I log_l Grayscale stretching is carried out respectively to obtain I logdst_h ,...

Embodiment 3

[0133] Please refer to Figure 4 and Figure 5 , Embodiment three of the present invention is:

[0134] A specific application of image subtraction in a multi-layer X-ray detector image processing method:

[0135] Set the dose of X-rays, collect low-energy images and high-energy images in a single exposure, and correct the low-energy images to obtain low-energy corrected images; logarithmically transform the low-energy corrected images to obtain I ln_l ; Perform logarithmic transformation on the high-energy image to get I ln_h ; Wherein, the logarithm in the logarithmic transformation is a natural logarithm; Determine the weighting coefficient w according to the preset target; Obtain the subtraction image I DE =I ln_h -w·I ln_l ;

[0136] Please refer to Figure 4 , is a low-energy chest X-ray image without subtraction, which shows the right lung and its surrounding bones. If it is necessary to subtract the right lung to enhance the display of bones, set Figure 4 The ...

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Abstract

The invention provides a multi-layer X-ray detector image processing method and a terminal. The method comprises the steps of obtaining multi-energy images of a to-be-measured object, wherein the multi-energy images are multiple images obtained by X-rays with different energies generated after the X-rays pass through an X-ray detector of a multi-layer flat plate structure; fusing the multiple multi-energy images subjected to logarithmic transformation to obtain a fused image; determining a weighting coefficient according to a preset target, and performing subtraction according to the weightingcoefficient and the multi-energy images to obtain a subtraction image; and according to the fused image and the subtraction image, obtaining an image analysis result. According to the method and theterminal provided by the invention, the multi-layer X-ray detector is arranged; the multi-energy images are obtained through one-time exposure; the obtained images are subjected to logarithmic transformation and then fused, so that the gray levels of the images and the thickness of the to-be-measured object have a linear relationship; the images can be subjected to subtraction according to the weight determined by the target; information of the to-be-measured object is obtained more accurately and pointedly; and the readability of the multi-energy images is improved.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image processing method and terminal of a multi-layer X-ray detector. Background technique [0002] The multi-energy X-ray detection technology collects at least two high-energy and low-energy images respectively, and realizes specific detection through the corresponding dual-energy subtraction technology; Density detection, metal detection and other functions; the traditional multi-energy X-ray detection technology generally adopts the structure of a single X-ray tube and a single detector, and the tube is operated to emit rays of different kV (such as high, medium, and low kV). The detector collects multi-energy images corresponding to kV, and for the collected images, dual-energy subtraction and other technologies can be used to obtain images with specific needs. [0003] The traditional multi-energy detection technology makes the ball tube emit rays of different kV in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/4208A61B6/505A61B6/52A61B6/5258
Inventor 蓝重洲王宗朋叶超成富平
Owner SHENZHEN ANGELL TECH
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