Thin-layer tissue blood oxygen imaging method and device based on Lambert-Beer's law

Abstract

The invention provides a thin-layer tissue blood oxygen imaging method and device based on Lambert-Beer's law. The method includes: controlling the light source to sequentially emit the first wavelength λ 1 light, the second wavelength λ 2 light and the third wavelength λ 3 light; respectively collected at the first wavelength λ 1 light, the second wavelength λ 2 light and the third wavelength λ 3 The images of the thin-layer tissue to be measured under the irradiation of light are sequentially recorded as the first thin-layer tissue image, the second thin-layer tissue image and the third thin-layer tissue image; according to the first thin-layer tissue image, the second thin-layer tissue image For the tissue image and the third thin-layer tissue image, the blood oxygen distribution of the thin-layer tissue to be measured is calculated by using the preset blood oxygen distribution algorithm; the blood oxygen distribution of the thin-layer tissue to be measured is converted to the image domain for display. According to the difference in absorption intensity of different wavelengths of light by blood and other components, the present invention obtains the two-dimensional distribution of blood oxygen saturation by measuring the two-dimensional light intensity distribution at different wavelengths, and then achieves the function of identifying blood vessels and urinary catheters.

Description

technical field [0001] The invention relates to the technical field of biomedicine, in particular to a thin-layer tissue blood oxygen imaging method and device based on Lambert-Beer's law. Background technique [0002] In clinical surgery, especially in abdominal or pelvic surgery, it is usually necessary to operate on the blood vessels in the operation, but because the surface of the ureter and blood vessels are covered with tissue components such as fat, the tissue adhesion is relatively heavy, so the surgeon cannot dissect the ureter normally , the relationship between blood vessels and surrounding tissues, it may also be due to various reasons such as insufficient experience of the surgeon, lack of familiarity with the direction of normal ureters and blood vessels, etc., which may cause accidental injury or even necrosis of the ureter. Once the ureter is damaged, it will cause various complications. , such as genitourinary fistula formation, hydronephrosis, renal functio...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high misjudgment rate in the traditional method of distinguishing ureters and blood vessels based on experience and the existing blood oxygen saturation detection algorithm cannot be applied to the blood oxygen saturation of the skin surface or tissue, the present invention provides a Lambert-based Thin-layer tissue blood oxygen imaging method and device based on Beer's law, the present invention measures the two-dimensional light intensity distribution at different wavelengths according to the different absorption intensities of blood and other components to light of different wavelengths, thereby obtaining the blood oxygen saturation Two-dimensional distribution, and then achieve the function of vascular urinary catheter identification

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