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Method and system for digital mammography tomosynthesis image reconstruction

A technology for synthesizing images and mammary glands, applied in the field of digital mammography, can solve problems such as interlayer artifacts in reconstructed images, achieve the effect of suppressing interlayer artifacts and improving quality

Active Publication Date: 2018-11-16
GUANGZHOU HUARUI TECH
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Problems solved by technology

[0005] Based on this, it is necessary to provide a digital mammography tomosynthesis image reconstruction method and system for the problem of interlayer artifacts in reconstructed images caused by limited angle exposure

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  • Method and system for digital mammography tomosynthesis image reconstruction

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Embodiment Construction

[0030] In order to facilitate the understanding of the present invention, the specific implementation of the method for reconstructing digital mammary tomosynthesis images of the present invention will be described in detail below in conjunction with the accompanying drawings. figure 1 A flowchart of a method for reconstructing a digital mammary tomosynthesis image according to an embodiment is shown, which mainly includes the following steps:

[0031] Step S10: Obtain projection images of the scanned object under different angles.

[0032] In this step, the DBT scanning system is used to emit multiple X-rays to the scanned object. Since the density of each part of the scanned object is different, the degree of absorption of X-rays is also different, so when the above-mentioned X-rays pass through the scanned object , there will be different degrees of attenuation, resulting in differences in the amount of X-rays that finally pass through the scanned object and reach the detec...

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Abstract

The invention relates to a method and system for reconstructing a digital breast tomosynthesis image. The method comprises a step of obtaining projection images of a scanned object at different angles, a step of calculating position coordinates of corresponding projections of a voxel to be reconstructed in the projection images, a step of identifying the types of the projections according to preset projection mask values in the position coordinates, wherein the types comprises a high-density material projection or a normal tissue projection, a step of judging that the voxel to be reconstructedis a normal tissue voxel if the ratio of a high-density material projection number in the projections to a total projection angle number is smaller than a set threshold, a step of removing high-density material projections in the projections corresponding to the voxel to be reconstructed of the normal tissue in the reconstruction process, and a step of carrying out back-projection reconstructionof remaining projections of the voxel to be reconstructed and obtaining a reconstruction image with a corrected artifact. Through the above method for reconstructing a digital breast tomosynthesis image, an inter-layer artifact in the reconstruction image is suppressed, and the quality of the reconstructed image is improved.

Description

technical field [0001] The invention relates to the technical field of digital mammography, in particular to a reconstruction method and system for digital mammography tomosynthesis images. Background technique [0002] Breast cancer is currently the most prevalent cancer among women in the world, and it seriously affects women's physical and mental health and social development. DM (Digital Mammography, X-ray mammography) is the first choice for imaging diagnosis of breast diseases. It uses the compression plate and support plate to press the female breast, and irradiates the breast tissue with soft X-rays, and then uses the detector to detect the penetrating X-rays. Receive and process to obtain a two-dimensional radiation image of the breast. [0003] DBT (Digital Breast Tomosynthesis, digital breast tomosynthesis) is a new type of breast imaging technology that is rapidly developing on the basis of DM imaging technology. During the scanning process, the ball tube is use...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/11
Inventor 吴书裕詹延义王浩文齐宏亮李翰威
Owner GUANGZHOU HUARUI TECH
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