Method for determining gain functions of flat panel detector, image correction method and image correction device

A flat panel detector and gain function technology, which is applied in the field of medical equipment, can solve the problems of inaccurate gain function of flat panel detector and affect image correction effect, etc., achieve wide applicability, improve correction quality, and improve correction accuracy

CN110755098AActive Publication Date: 2020-02-07SIEMENS SHANGHAI MEDICAL EQUIP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-02-07

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Abstract

The embodiment of the invention discloses a method for determining gain functions of a flat panel detector, an image correction method and an image correction device. The determining method comprisesthe following steps: acquiring a first dark field image and a first bright-field image of a full-size area, wherein the full-size area comprises a first area covered by X-rays and a second area not covered by the X-rays; determining a gain function of the first area based on the first dark field image and the first bright-field image; determining gain of pixel points in the second area based on gain of the edge pixel points adjacent to the second area in the first area; and determining a gain function of the full-size area based on gain of the pixel points in the second area and the gain function of the first area. According to the embodiment of the invention, the correction accuracy of gain functions is improved, and the image correction quality is significantly improved.
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Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to a method for determining a gain function of a flat panel detector, an image correction method and a device. Background technique

[0002] X-rays are electromagnetic radiation with wavelengths between ultraviolet and gamma rays. X-rays are penetrating and have different penetrating abilities for substances of different densities. In medicine, X-rays are generally used to project human organs and bones to form medical images. The flat panel detector is a kind of precision equipment, which plays a decisive role in the quality of X-ray imaging. Familiar with the performance indicators of the flat panel detector can help to improve the imaging quality and reduce the X-ray radiation dose.

[0003] Flat panel detectors generally include amorphous selenium flat panel detectors and amorphous silicon flat panel detectors. An ideal flat-panel detector would provide a homogeneous ...

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Embodiment Construction

[0088] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to illustrate the present invention, and are not used to limit the protection scope of the present invention.

[0089] For the sake of brevity and intuition in description, the solution of the present invention is explained below by describing several representative embodiments. Numerous details in the embodiments are merely configured to aid in understanding aspects of the present invention. However, it is obvious that the technical solutions of the present invention may not be limited to these details during implementation. In order to avoid unnecessarily obscuring aspects of the present invention, some embodiments are not described in detail, but merely framed. Hereinaft...