基于B超圖像的脂肪肝檢測系統(tǒng)的研究
[Abstract]:At present, the main method of fatty liver examination is ultrasonic imaging, but because of the shortcomings and shortcomings of ultrasound imaging, some computer-aided methods are needed to achieve a better recognition effect. However, the existing computer-aided methods for recognition of fatty liver have the disadvantages of low recognition rate and large amount of calculation, and can not meet the requirements of the construction of modern digital hospitals. This paper puts forward a new solution to the above situation, which can promote the recognition of fatty liver and the construction of hospital information. In recognition of fatty liver, this paper proposes different solutions for two different types of fatty liver. For non-uniform fatty liver, image enhancement method is adopted, combining the advantages of histogram equalization and homomorphism filtering, the image of suspected regional fatty liver is enhanced to highlight the lesion position and remind users to pay attention to it. For diffuse fatty liver, this paper analyzes and compares the existing computer-aided recognition methods and their advantages and disadvantages, and proposes a multi-level gray difference recognition method based on B-ultrasound image. Firstly, a trapezoid area is delineated on the liver image of interest, and the noise problem of vascular image in the delineated area is removed by using an improved median filtering algorithm. Then the delineated area is divided into a plurality of small trapezoid areas. The average grayscale value of each small trapezoid region is calculated to get the multilevel grayscale difference feature of liver picture, and then the multilevel gray difference characteristic curve of normal liver and fatty liver is analyzed and compared to determine the validity of multilevel grayscale difference feature. Finally, BP artificial neural network is used for feature recognition to achieve the purpose of image discrimination. In hospital information construction, this paper uses different image acquisition methods to connect the fatty liver detection system with the hospital image database, which supports the DICOM3.0 digital interface and the analog signal output of the S-terminal. To realize the sharing of hospital information. In particular, a semantic report template generation method is proposed for the writing of hospital medical records, which improves the efficiency of doctors.
【學(xué)位授予單位】:廣西工學(xué)院
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2012
【分類號】:R197.39;TP391.41
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