Blood flow velocity monitoring method based on micro blood flow imaging contrast algorithm
A technology of blood flow velocity and contrast, applied in blood flow measurement, diagnostic recording/measurement, medical science, etc. Ratio algorithm, inability to accurately express microvascular blood flow velocity, etc., to achieve improved effects, better imaging effects, and improved spatial resolution
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[0038] Such as figure 1 As shown, first obtain the original speckle image, and then use the linear operator to calculate the traditional time contrast K value and obtain the minimum spatial contrast K value direction θ i ; Then calculate the rotation matrix of the Gaussian template according to the direction, and obtain the corresponding Gaussian convolution template and Gaussian weighted kernel; convolve with the original image to obtain the anisotropic K value, extract the microvascular area, and use the direction specificity of cerebral blood flow to obtain micro Contrast value of blood flow.
[0039] Use the temporal convolution method to calculate the K value, where 30 frames of pictures can be selected, and the K value calculation method is as follows:
[0040]
[0041] In the above formula, σ is the standard deviation of the original picture, The average value of the original picture.
[0042] Calculate the K value in different linear directions, where the linear operator rot...
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