Computing method of blood flow volume and blood flow velocity of blood vessel per unit time
A unit time, blood flow velocity technology, applied in the medical field, can solve the problems that patients are unbearable, the calculation accuracy is affected by human factors, and cannot be guaranteed, so as to avoid calculation errors
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[0048] Example 1
[0049] The present invention provides a method for calculating blood flow and blood flow velocity of a blood vessel per unit time, which specifically includes the following steps: First, determine the region of interest of the blood vessel (a preferred method is to receive X-ray contrast of the blood vessel, and select Region of interest); secondly, calculate and fit the gray-scale fitting curve in the region of interest; secondly, obtain the maximum gray-scale value curve in a predetermined time interval; secondly, calculate the maximum gray-scale value in the predetermined time interval The area value S of the area surrounded by the curve and the gray-scale fitting curve; again, based on the area value S of the area, obtain the blood flow Q per unit time corresponding to the area value; finally, combine the vascular lumen area to obtain the blood flow rate Blood flow velocity V.
[0050] Preferably, the method may further include: determining the first time po...
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[0059] Example 2
[0060] See figure 1 , Coronary angiography uses the difference in the degree of absorption of rays by human soft tissue and contrast agent to form different high contrast between blood vessels and surrounding tissues on the angiographic image. The color depth of each pixel in the contrast image is represented by the gray value. The larger the gray value, the brighter the pixel. Gray histogram is the simplest and most useful tool in digital images. It represents the number of pixels with a certain gray level in the image. Its abscissa is the gray value, and the value range is preferably 0-255, and the ordinate is Indicates the number of occurrences of the gray value in the image, and the value range is preferably 0-N, where N is the number of image pixels.
[0061] As shown in Figure 2, we select a blood vessel containing a stenosis as a region of interest, and the region of interest includes the main blood vessel and its branches into which the contrast agent is...
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[0067] Example 3
[0068] It should be pointed out that the X-ray angiography used in the embodiments of the present invention may be coronary angiography of the heart, peripheral angiography such as renal angiography, carotid angiography, etc., or imaging before and after tumor treatment. The blood flow or blood flow velocity per unit time obtained based on the above-mentioned different angiography methods can be used for key parameter indicators in the analysis of different disease conditions, and obtain better accuracy and precision than the parameter indicators in the prior art. For example, the calculation of blood flow velocity based on cardiac coronary angiography can be used to evaluate the influence of vascular stenosis on blood flow velocity, as well as the subsequent calculation of the pressure difference or the fractional flow reserve (FFR) value of the stenotic vessel; based on renal angiography, it can be used in the renal artery Sympathetic nerve ablation is used t...
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