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Conical-beam image reconstruction method and image system and camera system

A technology of cone beam and imaging system, which is used in medical science, instruments for radiological diagnosis, diagnosis, etc.

Inactive Publication Date: 2018-11-23
达影医疗(中山)有限公司
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Problems solved by technology

There is no error in both methods, but the image seen by the monitor will be different
However, in some cases, it is necessary to compare two-dimensional images with tomosynthesis images, and this difference will cause inconvenience in diagnosis

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  • Conical-beam image reconstruction method and image system and camera system
  • Conical-beam image reconstruction method and image system and camera system
  • Conical-beam image reconstruction method and image system and camera system

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Embodiment Construction

[0037] As mentioned above, at present, in two-dimensional conventional X-ray breast images, two lesions overlap in different layers, and in tomosynthesis, the two lesions are respectively located in their respective slice images. When displayed on the monitor, the positions of the two lesions are lower than those displayed on the same display screen by the two-dimensional digital shadow; and the positions of the triangular lesions on the display screen are lower than the circular lesions. This reconstruction and display method of tomosynthesis is equivalent to projecting the reconstructed mammary glands onto the display plane in the form of "parallel beams"; while in two-dimensional digital images, the mammary glands are projected onto the display plane in the form of "conical beams" (also is the detector plane). The image seen on the monitor of the two methods will be different. However, in some cases, it is necessary to compare two-dimensional images with tomosynthesis imag...

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Abstract

The invention relates to a conical-beam image reconstruction method. Body layer analysis is carried out according to conical beams; the conical-beam image reconstruction method includes the followingsteps that multiple projections of multiple photographed parts shot at different angles are obtained; after reconstruction conical-beam light source positions are set, the pixel size of every body layer is set according to geometrical magnification rates of the conical beams on all body layer planes; body layer analysis is carried out according to the obtained pixel sizes of the body layers. The invention also provides a conical-beam image system and a breast X-ray camera system. Images reconstructed with the reconstruction method are displayed on a display, and conical-beam projections are shown, wherein objects distributed in the same X ray can appear at a same coordinate position of the display, and the position is directly compared with two-dimensional digital breast images.

Description

technical field [0001] The invention relates to the technical field of medical imaging equipment, in particular to a cone beam image reconstruction method, an image system and a photography system. Background technique [0002] Digital Breast Tomosynthesis (DBT) is a new generation of imaging screening technology for breast cancer. The X-ray tube (ray source) takes multiple breast projections at different angles, and then uses mathematical algorithms to reconstruct these projections at different angles into layers of internal breast structure information, usually each layer represents breast tissue with a thickness of 1mm. figure 1 Among them, some "lesions" are placed at different heights inside the breast. Two-dimensional digital mammography 2D mammography is a conventional imaging technology. It takes a two-dimensional projection of the breast. The "lesions" at different heights overlap together, making it easy to cover each other. Missed and misdiagnosed. Digital mamma...

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Application Information

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IPC IPC(8): A61B6/00
CPCA61B6/48A61B6/5229
Inventor 吴涛
Owner 达影医疗(中山)有限公司
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