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Perspective exposure control method and device and X-ray machine

A technology of exposure control and control method, which is applied in the fields of radiological diagnostic equipment control, radiological diagnostic equipment, medical science, etc., which can solve the problems of high radiation dose, patient radiation, and little significance of fluoroscopy images, etc., so as to reduce the radiation dose Effect

Inactive Publication Date: 2018-03-20
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, for the above application scenarios, collecting multiple frames of fluoroscopic images is of little significance, and will expose patients to unnecessary radiation
For the exposure mode, although the final displayed image is only one frame, the radiation dose of a single frame of X-rays in the exposure mode is usually far greater than the radiation dose of a single frame of X-rays in the perspective mode. high radiation dose
Therefore, the aforementioned two exposure modes, the radiation dose is higher

Method used

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  • Perspective exposure control method and device and X-ray machine
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  • Perspective exposure control method and device and X-ray machine

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Experimental program
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Effect test

Embodiment 1

[0039] As mentioned in the background art, when a C-arm X-ray machine is used to acquire images using the existing perspective exposure mode, the radiation dose is relatively high.

[0040] Those skilled in the art know that different target objects have different degrees of attenuation of X-rays, for example, adipose tissue has a small attenuation of X-rays, while muscle tissue has a large attenuation of X-rays. If the attenuation degree of the target object to X-rays is greater, the brightness of the collected image will be darker (the gray value is smaller), and if the degree of attenuation of the target object to X-rays is smaller, the brightness of the collected image will be brighter (The larger the grayscale value), the image in both cases is not clear because the desired target brightness is not achieved. In order to obtain an image with the target brightness, if the image brightness is dark, it is necessary to increase the X-ray dose (controlled by exposure parameters...

Embodiment 2

[0061] figure 2 It is a schematic flow chart of the see-through exposure control method provided in Embodiment 2 of the present invention. On the basis of the technical solution of Embodiment 1, this embodiment performs step 120 "obtaining the brightness of the target object based on the brightness of the target and the brightness of the N-th frame image. "Equivalent body thickness" has been further optimized. The advantage of optimization is that the equivalent body thickness of the target object can be obtained accurately and quickly, and then the image of the target brightness can be quickly obtained, so as to shorten the fluoroscopy time and reduce the radiation dose during the fluoroscopy process. For details, see figure 2 As shown, the method includes:

[0062] Step 210, acquiring the brightness of the image of the Nth frame of the target object, where N is greater than or equal to 1.

[0063] Step 220. Obtain the ratio of the brightness of the image in the Nth frame...

Embodiment 3

[0075] image 3 It is a schematic structural diagram of the see-through exposure control device provided in Embodiment 3 of the present invention, see image 3 As shown, the device includes: an acquisition module 310 , a calculation module 320 , a determination module 330 and a perspective module 340 .

[0076] Wherein, the obtaining module 310 is used to obtain the brightness of the Nth frame image of the target object, wherein N is greater than or equal to 1; the calculation module 320 is used to obtain the brightness of the target object based on the brightness of the target object and the brightness of the Nth frame image. The effective body thickness; the determination module 330 is used to determine the exposure parameters matching the equivalent body thickness of the target object in the body thickness model; the perspective module 340 is used to perform perspective on the target object based on the exposure parameters.

[0077] Further, the fluoroscopy module 340 incl...

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Abstract

The embodiment of the invention discloses a perspective exposure control method and device and an X-ray machine. The control method comprises the following steps: acquiring brightness of the Nth frameimage of a target object; acquiring an equivalent volume thickness of the target object based on target brightness and the brightness of the Nth frame image; determining exposure parameters matched with the equivalent volume thickness of the target object in a volume thickness model; and performing perspective inspection on the target object based on the exposure parameters. According to the perspective exposure control method provided by the embodiment of the invention, the target brightness images meeting the clinical requirements can be rapidly acquired, and the radiation dose in the perspective inspection process is greatly reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of medical device control, in particular to a method and device for controlling fluoroscopic exposure and an X-ray machine. Background technique [0002] In the field of medical X-ray fluoroscopy, C-arm X-ray machines are often used to diagnose and treat patients. For example, in orthopedic surgery, a C-arm X-ray machine is often used to locate the surgical site. [0003] At present, the existing perspective exposure control technology has two control modes: perspective and exposure. Among them, the fluoroscopy mode generally emits X-ray pulses in continuous multiple frames, and the time of X-ray radiation is controlled by the doctor himself. Usually, there will be 2~3s, in this process, usually at least 20 frames of images are generated. However, in many cases, doctors may only pay attention to one or a few frames of images. For example, in orthopedic surgery, orthopedic surgeons seldom monit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/4411A61B6/54A61B6/542
Inventor 唐冰
Owner SHANGHAI UNITED IMAGING HEALTHCARE