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Method for Eliminating Afterimage of Flat Panel Detector Image and Flat Panel Detector

A flat-panel detector and image technology, applied in image enhancement, image data processing, instruments, etc., can solve the problem that the flat-panel detector image afterimage is difficult to be effectively eliminated, achieve objective market application value, eliminate image afterimage, and be highly practical sexual effect

Active Publication Date: 2019-02-26
SHANGHAI IRAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 and a method for eliminating image persistence of the flat panel detector, which is used to solve the problem that the image persistence of the flat panel detector is difficult to effectively eliminate in the prior art

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  • Method for Eliminating Afterimage of Flat Panel Detector Image and Flat Panel Detector
  • Method for Eliminating Afterimage of Flat Panel Detector Image and Flat Panel Detector
  • Method for Eliminating Afterimage of Flat Panel Detector Image and Flat Panel Detector

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Embodiment 1

[0058] Such as figure 1 As shown, this embodiment provides a method for eliminating image persistence of flat panel detectors. From the perspective of imaging, the so-called image persistence refers to the afterglow multiplication effect. When two or more original bright field images are collected, In the current original bright-field image, the image information of one or more times before will remain, which is a kind of artifact phenomenon. The method for eliminating the image afterimage of the flat panel detector comprises the following steps:

[0059] 1) Expose using a flat panel detector, collect one frame of original bright field image and one frame of original dark field image, and record the acquisition time point t1 of the original bright field image;

[0060] 2) Use the flat panel detector to continue exposure, collect one frame of original bright-field image and one frame of original dark-field image, and record the acquisition time point t2 of the original bright-...

Embodiment 2

[0097] see Figure 4 , the present invention also provides a flat panel detector, the flat panel detector includes: an image acquisition module 1, the image acquisition module 1 is suitable for acquiring original bright field images and original dark field images; an image processing module 2, the image The processing module 2 is connected to the image acquisition module 1, and is suitable for performing background correction, gain correction, bad pixel / bad line correction on the collected original dark field image by using the method described in Embodiment 1, and performing correction according to the weighting coefficient Weighting coefficient compensation and iterative update, and background correction, gain correction, bad point / bad line correction and image afterimage correction for the original bright field image; image display module 3, the image display module 3 and the image processing module 2, suitable for displaying the final image processed by the image processin...

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Abstract

The invention provides a flat-panel detector and a method for eliminating image afterimages of the flat-panel detector. The method includes: 1) using the flat-panel detector for exposure, collecting one frame of original bright field image and one frame of original dark field image, and recording the said The collection time point of the original bright field image is t1; 2) Use a flat-panel detector to continue exposure, collect one frame of original bright field image and one frame of original dark field image, and record the collection time point of the original bright field image t2; 3) According to the natural attenuation law of the image afterimage, the weighting coefficient is obtained based on the time interval between t1 and t2; 4) Use the weighting coefficient in step 3) to compensate the original dark field image collected in step 1) and then use the difference operation to calculate the weighting coefficient in step 2 ) to perform image afterimage correction on the original bright field image collected. The method of the present invention has a concise flow, streamlined algorithm, high practicability and system integrability.

Description

technical field [0001] The invention belongs to the technical field of radiographic image processing, and in particular relates to a flat panel detector and a method for eliminating image residuals of the flat panel detector. Background technique [0002] At present, due to the physical characteristics of amorphous silicon or amorphous selenium X-ray flat panel detectors, when the supersaturated dose is exposed, the charge cannot be released at one time, and the target image will have the problem of afterimage, and once image afterimage occurs The shadow cannot be eliminated from the hardware, and it takes time for natural attenuation, and the images taken after subsequent exposures will have afterimage interference. [0003] The current amorphous silicon or amorphous selenium X-ray flat panel detectors have the phenomenon of image afterimage, which is caused by afterglow of scintillators (such as cesium iodide, gadolinium oxysulfide) and TFT sensor, photo Diode, RC itself a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/00G06T5/77
Inventor 王锋张楠金利波张晨旭潘力平
Owner SHANGHAI IRAY TECH
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