Method and device for reducing noise in ultrasound image

Abstract

The invention relates to an image processing technique, particularly relates to an image data processing technique in an ultrasound image, and more particularly to a method and a device for reducing noise in the ultrasound image. The method provided by the invention comprises the following steps: reading ultrasound image data; selecting an adjacent region with each pixel point as a center; computing the variance mean value ratio of the pixel points in each direction in the adjacent regions; computing discrimination factors according to the variance mean value ratio; respectively distinguishing the adjacent regions of the pixel points as an edge region, a non-edge region and a semi-edge region according to the discrimination factors; respectively carrying out filtering processing on the different edge regions; and outputting the processed ultrasound image data. According to the technical scheme provided by the invention, the edge enhancement and spot suppression of images can be simultaneously realized; and the method provided by the invention has the advantages of simple algorithm, self adaptation, strong practicality and the like, is easy to achieve by hardware, and can be conducted in real time.

Description

technical field [0001] The present invention relates to image processing technology, in particular to image data processing technology in ultrasonic imaging, especially a method and device for ultrasonic image denoising. Background technique [0002] In medical ultrasound imaging, due to the inhomogeneity of the imaging organ or tissue structure, some tiny structures cannot be resolved, and the interference phenomenon of the acoustic wave signal forms unique spots on the ultrasound image. The image quality is reduced. At present, the commonly used denoising algorithms mainly include resolution enhancement, superposition averaging and post-processing methods. [0003] The resolution enhancement algorithm mainly enhances the resolution of the ultrasound system to achieve the purpose of noise reduction. Such methods include increasing the probe frequency, coded excitation (Coded-excitation), array probe (Matrix-array transducer) and harmonics (Harmonics), but the probe frequen...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the above-mentioned patented method is that: according to the mathematical statistical characteristics of pixels in a certain neighborhood, the pixels are simply divided into edge areas and non-edge areas. The division method will cause the loss of image information, and the amount of calculation is large, which is difficult for practical application

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