Small part X ray image background suppression method and device thereof

A background suppression and line image technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of loss of soft tissue information, incomplete background suppression, and uneven background intensity, achieve good suppression effect, increase display proportion, Effects that improve image quality

Active Publication Date: 2015-11-25
LIAONING KAMPO MEDICAL SYST
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Problems solved by technology

Usually, in order to prevent the tissue from being mistakenly judged as the background, the threshold is set relatively low. Usually, the

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  • Small part X ray image background suppression method and device thereof
  • Small part X ray image background suppression method and device thereof
  • Small part X ray image background suppression method and device thereof

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[0073] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0074] At present, X-ray equipment produces X-rays by bombarding the anode target (usually a tungsten target) with high-speed electrons emitted from the cathode filament in the tube. The X-rays are not generated on the surface of the anode target, but by its atoms inside the anode target. And the interaction of high-speed electrons. The path that X-rays travel through when exiting the anode target varies according to their exit angle, such as figure 1 As shown, this effect is the heel effect. According to Lambert-Beer theorem I=I 0 e -μl That is, when the attenuation coefficient of the material is the same, the intensity of the rays is inversely proportional to the exponent of the path length of the rays in the material. Therefore, the intensity of the X-rays emitted from the anode target gradually decreases along the direction of the high-speed electrons. Ob...

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Abstract

The invention discloses a small part X ray image background suppression method and a device thereof. The method comprises steps: rough background information is extracted from an original image; according to the rough background information, fine background information is acquired; according to the fine background information, a background image is synthesized; and a full background image is removed from the original image. The device comprises a rough background extraction module, a fine background extraction module, a background image synthesis module and a background removal module. The invention adopts an X ray image background extraction method for small parts, background information in an effective image region can be effectively removed, a display proportion of soft tissues and detail information in the image is enhanced, and the image quality is enhanced.

Description

technical field [0001] The invention relates to the technical field of X-ray digital image processing, in particular to a method for suppressing the background of small-part X-ray images and a device for suppressing the background of small-part X-ray images realized by the method. Background technique [0002] In the X-ray imaging process, since the ray source is not absolutely aligned with the center of the detector, there is usually a certain position deviation, that is, the X-ray beam is not irradiated vertically on the detector, but there is a certain inclination angle, and The difference in the distance between the focal point and the different positions of the flat-panel detector leads to non-uniform distribution of X-rays on the detector. In addition, the heel effect unique to the high-speed electron bombardment of the anode target to generate X-rays, the length difference of the filtering path passed by the X-rays, and the scattered X-ray photons generated by the int...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 周传丽张启林孙洪文金荣飞刘卓
Owner LIAONING KAMPO MEDICAL SYST
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