X-ray image sensor and method for eliminating image blur

Abstract

The present invention provides an X-ray image sensor and a method for eliminating image blur. According to the method, each pixel is connected with two thin film transistor (TFT) switches, a single scan line is between pixel rows, and two read lines are between pixel columns, so that one row of pixel is independently controlled by scan lines of upper and lower sides; and an upper read circuit is used for reading a bright field image, and a lower release circuit is used for clearing residual information in a dark field. Read and release at the upper and lower sides are performed synchronously, but the difference between read and release is one row of spatial physical position, so that after one frame of bright field image is collected, residual image information in the dark field is also cleared one time. When a current bright field image is collected, lag information of the current frame image is cleared. A single clear operation and extra clearing time are not increased. The method can be used in a static collection condition or a dynamic collection condition, and effectively improves the image collection frequency and image quality.

Description

technical field [0001] The invention relates to the field of medical image diagnosis, in particular to an X-ray image sensor and a method for eliminating image afterimages. Background technique [0002] X-ray digital photography technology has been more and more widely used in the field of medical imaging diagnosis today. Among various X-ray digital photography equipment, X-ray detector is the most core and key component with the highest technical content in this type of equipment. It plays an indispensable key role in the imaging acquisition process of the entire image. [0003] Amorphous silicon X-ray flat panel detector mainly consists of X-ray incident surface (usually carbon plate material), scintillator, X-ray image sensor, signal integral reading circuit, structural shell and other parts. [0004] The imaging process of the X-ray detector needs to go through the transformation process from "X-ray" to "visible light" to "electron". like figure 1 As shown, during the...

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Problems solved by technology

[0010] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an X-ray image sensor and a method for eliminating image sticking, which are used to solve the problem that lag sticking affects image quality in the prior art

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