METHOD FOR DETERMINING THE ECHOGENICITY OF THE STOMACH WALL AND SMALL INTESTINE OF DOGS AND CATS Russian patent published in 2021 - IPC A61B8/00 

FIELD: veterinary medicine.

SUBSTANCE: invention relates to veterinary medicine, in particular to a method for determining the echogenicity of the wall of the stomach and small intestine of dogs and cats during ultrasonic diagnostics; it is used for objective analysis of the echogenicity of the layers of the wall of the digestive canal of dogs and cats. A method for determining the echogenicity of the stomach wall and small intestine of dogs and cats is proposed, which includes the analysis of the echo heterogeneity of the layers of a digitized ultrasound image on an IBM PC-compatible computer in a graphic editor in black and white mode, which is an assessment of two zones of one layer - the investigated and compared one. The investigated zone and the compared zone are circled using the “lasso” tool, the histogram function is enabled, and the numeric values of the “average value” and “deviation” parameters are automatically displayed in the Adobe Photoshop histogram window. For the compared zone, the “deviation error in the compared zone” is additionally determined, for which this zone is divided into several sections, the deviation value in each section of this zone is determined, the maximum deviation and minimum deviation in the compared zone or its sections are selected, and the deviation error in the compared zone is calculated using a mathematical formula. Then, the difference of deviations in the studied zone and in the compared zone is calculated using a mathematical formula. Next, the deviation error in the compared zone is compared with the difference in the deviations in the studied and compared zone according to a mathematical formula. As a result of these calculations, the degree of echo homogeneity of the layer is determined. The zone under study is hetero-echogenic, if the criterion of echo heterogeneity (hereinafter – CEH) < 0. The ultrasonic image is obtained at the calibration setting of the ultrasonic scanner on the gain control scale of the device, equal to 255. The analysis of the ultrasonic image in the graphic editor is carried out on a tripled scale, and provided that the CEH > 0, i.e. under the condition of the homo-echogenicity of the layers, the coefficient or index of the echogenicity of the stomach or intestinal wall is calculated. To do this, the proportion of the echogenicity of each layer of the wall of the corresponding structure of the digestive canal is determined in the form of the ratio of the obtained result of the Str_bright for each individual layer of the stomach wall, duodenum or jejunum (mucosa, submucosa, muscle) as a percentage to the maximum echo reflection, expressed in the maximum pixel brightness value of an 8-bit image equal to 256 according to the mathematical formula.

EFFECT: invention provides increased accuracy of the diagnostics of diseases of the digestive canal, the expansion of the diagnostic search, the determination of tactics for further treatment if necessary, as well as the conduct of morph-ultrasonic correlation in the future.

1 cl, 6 dwg