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Automatic exposure control method and computer readable storage medium

A control method and automatic exposure technology, applied in computer parts, computing, medical science, etc., can solve problems such as inappropriate dose, lowering the professional level of technicians in exposure links, etc., to overcome interference, stable and reliable image quality, and alleviate The effect of business-level requirements

Active Publication Date: 2020-02-07
SHENZHEN ANGELL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide an automatic exposure control method and a computer-readable storage medium, which can solve the problem of inappropriate dose during exposure in the prior art, and reduce the requirements on the professional level of technicians in the exposure process

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  • Automatic exposure control method and computer readable storage medium
  • Automatic exposure control method and computer readable storage medium

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Embodiment 1

[0078] Please refer to Figure 2-5 , Embodiment 1 of the present invention is: an automatic exposure control method, which can be applied to X-ray imaging systems, such as figure 2 shown, including the following steps:

[0079] S101: Obtain the first image according to the preset exposure dose, the exposure dose is less than the normal dose; that is, exposure is performed with the exposure dose lower than the normal dose of the high-voltage generator (depending on the projection site of the human body), to obtain The first image, the high-voltage generator includes three parameters, and its units are kV (kV), mA (milliampere) and mAs (milliampere second), in the present embodiment, kV and mA in the injection dose can be compared with The normal dose is consistent, and the mAs in the injected dose is lower than that in the normal dose. For example, for the lumbar spine, the normal dose is 80kV, 400mA, 20mAs, then the injection dose can be 80kV, 400mA, 10mAs.

[0080] S102: ...

Embodiment 2

[0110] Please refer to Figure 6-8 , this embodiment is a further expansion of Embodiment 1, and the similarities will not be repeated here. The difference is that this embodiment combines the absorbed dose of the region of interest of the human body on the basis of the judgment of the gray level of the image in the embodiment. judge, such as Figure 6 As shown, after the step S102, it also includes:

[0111] S301: Setting a detection area of ​​an ionization chamber, where the detection area includes a plurality of sensing areas, and the coverage of the plurality of sensing areas is greater than or equal to the size of the first image.

[0112] Such as Figure 7 as shown, Figure 7 The left side 1 is the detection area of ​​the traditional ionization chamber, which is in the shape of a character, 1-1, 1-2, 1-3 represent the left, right, and middle sensing areas respectively, and detect the X-ray intensity of each sensing area through the ionization effect , the relationshi...

Embodiment 3

[0125] This embodiment corresponds to the above-mentioned embodiments. The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the following steps are implemented:

[0126] Acquiring a first image according to a preset exposure dose, where the exposure dose is smaller than a normal dose;

[0127] performing image processing on the first image to obtain a human body region of interest;

[0128] Calculating the gray median value of the pixels in the region of interest of the human body in the first image;

[0129] judging whether the gray-scale median value reaches a preset image target gray-scale value;

[0130] If reached, then output the first image;

[0131] If not, acquire a second image according to the preset dose step value;

[0132] performing grayscale accumulation of the first image and the second image to obtain a third image;

[0133] Using the third image as a new...

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Abstract

The invention discloses an automatic exposure control method and a computer readable storage medium, and the method comprises the steps: obtaining a first image according to a preset projection dose which is smaller than a normal dose; performing image processing on the first image to obtain a region of interest of a human body; calculating the gray scale median of the pixel points in the region of interest of the human body in the first image; judging whether the gray scale median reaches a preset image target gray scale value; if yes, outputting the first image; if not, acquiring a second image according to a preset dose stepping value; performing image gray scale accumulation on the first image and the second image to obtain a third image; and taking the third image as a new first image, and continuously executing the step of carrying out image processing on the first image to obtain a region of interest of the human body. According to the method, the problem of improper dosage during exposure in the prior art can be solved, and the requirement of an exposure link on the technician business level is reduced.

Description

technical field [0001] The invention relates to the technical field of image processing and automatic control, in particular to an automatic exposure control method and a computer-readable storage medium. Background technique [0002] In the existing X-ray imaging (Digital Radiography, DR) system, there are mainly two kinds of exposure technologies, one is the fixed dose method, which depends on the experience of the manufacturer and the radiographer to set a certain projection dose (that is, the kV of the high voltage generator, mA , mAs), however, when using DR to obtain X-ray images of the human body, there are differences in the size and location of the projected human body, and the fixed parameters often cannot achieve the optimal projection effect, and there are situations where the dose is insufficient or excessive. In addition, the technician Insufficient experience will also lead to a sharp drop in the yield rate of projections. [0003] Therefore, an automatic exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/32G06K9/38A61B6/00
CPCA61B6/5229A61B6/542G06V10/28G06V10/25
Inventor 蓝重洲刘德建李华勇杨群叶超
Owner SHENZHEN ANGELL TECH
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