An X-ray flat panel detector for automatic exposure detection and its sensor panel structure

Abstract

The invention provides an X-ray flat panel detector for automatic exposure detection and its sensor panel structure, the sensor panel structure includes a first image sensor array layer that senses incident light to realize X-ray imaging; Below, the second image sensor array layer senses the incident light passing through the first image sensor array layer to realize automatic exposure detection. The invention optimizes the design of the sensor panel in the flat panel detector, adds a full-view AED sensor array located below the imaging sensor array in the sensor panel, and realizes the full-view AED function.

Description

technical field [0001] The invention relates to the field of medical image diagnosis, in particular to an X-ray flat panel detector for automatic exposure detection and a sensor panel structure thereof. Background technique [0002] X-ray photography utilizes the short-wavelength, easy-to-penetrate properties of X-rays, and the different characteristics of X-ray absorption by different tissues, and forms images by detecting the intensity of X-rays passing through objects. [0003] The X-ray imaging system has two important components, one is the X-ray flat panel detector, a device that can detect X-rays and convert them into electrical signals and output them in the form of images; the other is the X-ray high-voltage generator and the X-ray tube. At present, the industry still lacks a unified standard for the software and hardware communication between the X-ray flat panel detector and the X-ray high-voltage generator, which brings difficulties to the system design in the s...

AI Technical Summary

Problems solved by technology

At present, there are two ways to achieve automatic synchronization. One is to add an additional sensor behind the flat panel, and use the sensor to sense the X-ray or visible light that passes through the flat panel sensor of the detector itself to sense the exposure. The problem with this implementation method The reason is that additional sensors will increase the cost and the difficulty of detector structure design, and this additional sensor generally does not cover the entire detection range of the detector. It may cause exposure induction failure due to no dose or too low dose at the position of the additional sensor. Moreover, the existence of the back sensor will cause backscattering of the light signal, resulting in a decrease in image quality

The second way to achieve automatic synchronization is to determine the exposure time point by calculating the gray value difference of the image before and after exposure by designing the working timing of the flat panel detector itself through the algorithm, but because the sensor panel in the flat panel detector itself is designed In order to meet various parameters such as certain resolution and frame rate, if it is used as an exposure sensor sensor, there may be problems with its response time and accuracy.

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