Microcirculation resistance index calculation method based on radiography image and hydrodynamics model

A contrast image and fluid dynamics technology, applied in image data processing, calculation, image enhancement, etc., can solve the problems of expensive and large-scale application of pressure guide wire, increase the difficulty and risk of surgery, and reduce the difficulty, risk and accuracy of surgery High, fast effect

Inactive Publication Date: 2018-09-18
SUZHOU RAINMED MEDICAL TECH CO LTD
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[0005] However, the above-mentioned pressure guide wire needs to intervene in the end of the blood vessel to measure IMR, which increases the

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  • Microcirculation resistance index calculation method based on radiography image and hydrodynamics model
  • Microcirculation resistance index calculation method based on radiography image and hydrodynamics model
  • Microcirculation resistance index calculation method based on radiography image and hydrodynamics model

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[0070] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0071] like figure 1 As shown, the method for calculating the microcirculation resistance index based on the contrast image and the fluid dynamics model of the present invention includes the following steps.

[0072] Define the first frame in which the catheter appears in the time series X-ray coronary angiography image as the reference image A, such as figure 2 As shown, there is a complete coronary artery that needs ...

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Abstract

The invention discloses a microcirculation resistance index calculation method based on a radiography image and a hydrodynamics model. The method comprises steps of selecting coronary artery images oftwo positions to carry out segmentation so as to obtain a coronary artery center line and a diameter; generating a coronary artery three-dimensional mode; acquiring blood conduction time Tmn and thespeed; establishing a blood vessel three-dimensional network; based on the coronary artery center line and the diameter of the X-ray reconstruction, generating an axially symmetrical two-dimensional plane mode; then, establishing two-dimensional axially symmetrical grids; measuring aorta mean blood pressure Pa; based on the obtained blood flow speed and the generated blood vessel three-dimensionalnetwork, solving fundamental formula of incompressible flows, and calculating the pressure drop deltaPi of each point from the entrance to the downstream along with the blood vessel center line, wherein the coronary artery far-end artery pressure Pd=Pa-deltaPi; and calculating the microcirculation resistance index IMR=Pd*Tmn. According to the invention, there is no need to carry out measurement through pressure guide wires, so operation is simple; operation difficulty and risk are greatly reduced; and the method can be clinically promoted and applied in large scale.

Description

technical field [0001] The invention relates to the field of coronary imaging evaluation, in particular to a method for calculating microcirculation resistance index based on contrast images and fluid dynamics models. Background technique [0002] Coronary heart disease is a serious heart disease. Percutaneous coronary intervention (PCI) has become an important means of treatment for coronary heart disease. Years of research have shown that PCI can treat coronary heart disease, especially acute coronary syndrome (acute coronary syndrome, ACS). However, existing studies have shown that even with coronary intervention or coronary artery bypass grafting, 25% of patients still fail to achieve myocardial reperfusion at the tissue level after successful epicardial vessel reconstruction. The main reason is the dysfunction of coronary microcirculation. Impaired coronary microcirculation function is an independent risk factor determining the prognosis of acute myocardial infarction,...

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Application Information

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IPC IPC(8): G06T17/20G06T5/00G06T7/187
CPCG06T5/002G06T7/187G06T17/205G06T2207/30048G06T2207/30104
Inventor 霍云飞刘广志张海玲王之元
Owner SUZHOU RAINMED MEDICAL TECH CO LTD
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