Flat panel detector system and image noise reduction method thereof

Abstract

The invention provides a flat panel detector system and an image noise reduction method thereof. The flat panel detector system comprises, at least, an X-ray sensor, an acquisition and drive circuit, a main CPU control processing unit, an image display unit, a low-noise voltage stabilizing circuit, a standby super-capacitor, a charging unit, a switching power supply and an external input power supply, wherein the main CPU control processing unit is further used for conducting synchronous time sequence control on the acquisition and drive circuit, the image display unit, the charging unit and the switching power supply. At an image acquisition moment, the main CPU control processing unit is further used for turning off the switching power supply and the charging unit and synchronously starting the standby super-capacitor. The flat panel detector system permits power supply by using the high-efficiency switching power supply inside the flat panel detector, meanwhile an improved method for avoiding stripe noise interference produced to detector images is provided, the internal shielding cost is reduced, image noise is improved, and the stability of the image noise is improved.

Description

technical field [0001] The invention relates to the technical field of detectors, in particular to a flat panel detector system and an image noise reduction method thereof. Background technique [0002] Digital Radiography (Digital Radiography, referred to as DR), is a new technology of X-ray photography developed in the 1990s. With its remarkable advantages such as faster imaging speed, more convenient operation, and higher imaging resolution, it has become It is the leading direction of digital X-ray photography technology and has been recognized by clinical institutions and imaging experts all over the world. The technical core of DR is the flat panel detector, which is a sophisticated and expensive device that plays a decisive role in the imaging quality. The flat panel detector is the X-ray receiving device in the DR system. In the DR system, the high-voltage generator and the ball tube control the output of X-rays. The X-rays pass through the object and are attenuate...

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a flat panel detector system and its image noise reduction method, which is used to solve the problem of near-field noise interference caused by switching power supplies in the prior art and affect image quality.

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