Automatic exposure control method and flat panel detector
A technology of a flat panel detector and a control method, which is applied in the fields of radiological diagnosis instruments, medical science, diagnosis, etc., can solve problems such as affecting physical health, affecting image quality, and increasing living body radiation.
Pending Publication Date: 2021-06-04
上海昊博影像科技有限公司
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[0003] However, this placement method will irradiate the shadow of the AEC sensor on the captured image, which will affect the image quality. Moreover, the AEC device will block the radiation, so that the X-ray dose displayed in the image will have a certain attenuation. In order to improve the shooting effect, it is necessary to Increase the X-ray exposure dose during shooting, which will increase the radiation received by the living body when shooting scenes in the living body and affect its health
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[0022] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .
[0023] see Figure 1-4 ,in, figure 1 It is a structural diagram of an embodiment of the automatic exposure control method of the present invention; figure 2 It is a timing diagram of an embodiment of the acquisition timing of the flat panel detector in the automatic exposure control method of the present invention; image 3 It is a timing diagram of an embodiment of dark field continuous image acquisition performed by the flat panel detector in the automatic exposure control method of the present invention; Figure 4 Generate exposure bright field in the automatic exposure control method of the present invention Figure 1 Example timing diagram. ...
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The invention provides an automatic exposure control method and a flat panel detector. The automatic exposure control method is applied to the flat panel detector. The automatic exposure control method comprises the following steps of: S101, performing dark field continuous image acquisition, acquiring acquired image data, judging whether exposure is started according to gray data in the image data, if so, executing S102, and otherwise, executing S101; S102, acquiring an image acquired from the exposure starting moment to the current moment, acquiring an exposure accumulated dose according to a gray value of the image, judging whether the exposure accumulated dose reaches a preset value, if so, executing S102, and otherwise, executing S103; and S103, controlling a high-voltage generator or a bulb tube to stop exposure. According to the automatic exposure control method provided by the invention, the exposure accumulated dose is acquired through the image acquired by the flat panel detector, and the exposure is controlled according to the exposure accumulated dose, thereby reducing the cost of setting an AEC device, improving the quality of the shot image, avoiding the increase of the exposure dose and reducing the radiation to a living body.
Description
technical field [0001] The invention relates to the field of exposure control, in particular to an automatic exposure control method and a flat panel detector. Background technique [0002] The AEC (Automatic Exposure Control) device is an independent device independent of the flat-panel detector, high-voltage generator, and bulb. Its function is that the AEC device can automatically detect the current real-time exposure dose during the actual X-ray filming process. When the cumulative exposure dose reaches the preset value, the automatic control stops the exposure action of the high-voltage generator and the tube, and stops the X-ray emission. The traditional AEC device is a hardware entity. In the actual shooting process, the AEC device is externally placed between the flat panel detector and the shooting object for actual shooting. [0003] However, this placement method will irradiate the shadow of the AEC sensor on the captured image, which will affect the image qualit...
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IPC IPC(8): A61B6/00
CPCA61B6/542A61B6/4208
Inventor 许馨
Owner 上海昊博影像科技有限公司