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Method and device for calculating vascular functional indexes

A functional and vascular technology, applied in the field of hemodynamics, can solve problems such as large amount of calculation and high requirements for computing resources, and achieve the effect of reducing high demand, shortening calculation time, and solving large amount of calculation.

Active Publication Date: 2022-04-08
深圳市阅影科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of this application is to provide a method, device, computer storage medium, and processor for calculating vascular functional indicators, so as to solve the problem that the method for obtaining blood flow characteristics by using three-dimensional flow equations in the prior art has a large amount of calculation and requires a lot of computing resources. Highly demanding technical issues

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  • Method and device for calculating vascular functional indexes
  • Method and device for calculating vascular functional indexes
  • Method and device for calculating vascular functional indexes

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Effect test

Embodiment 1

[0103] This embodiment relates to a specific method for calculating the vascular function indicators of the coronary artery tree using a reduced-order model, for example, the Fractional Flow Reserve (FFR) indicator, the main process of which includes: first obtaining geometric information through image data, and then Obtain the geometric features required by the one-dimensional blood flow model based on the geometric information, then identify the topology of the coronary tree based on the geometric features, and then identify the narrow area based on the geometric features, and then use the one-dimensional blood flow model to calculate the outlets of the coronary tree The impedance value in the resting state, and then get the impedance value in the hyperemia state according to the impedance value in the TCRI and the resting state, and then use the one-dimensional blood flow model to calculate the blood flow characteristics of the coronary tree in the hyperemia state, and finall...

Embodiment 2

[0136] This embodiment relates to a specific method for optimizing a virtual stent using a one-dimensional blood flow model, and the specific steps include:

[0137] In step S301, geometric data of blood vessels, for example, a three-dimensional model of blood vessels, is obtained through image processing technology based on the image data, and geometric features, for example, are further extracted from the geometric data. centerline, radius;

[0138] Step S302, obtaining the inlet pressure and flow rate of the coronary artery tree through the basic data and empirical relationship, and using the three-dimensional model to calculate the second flow field data of the whole arterial tree, including flow velocity, pressure, etc.;

[0139] Step S303, according to the position where the virtual stent needs to be placed, intercept an appropriate length, for example, take a blood vessel segment that is three times the length of the stenosis, where the position where the stent needs to...

Embodiment 3

[0147] This embodiment relates to a specific method of using a reduced-order model to calculate a three-dimensional simulation calculation of blood flow in a blood vessel to provide an initial flow field, and the specific steps include:

[0148] Step S401, based on the image data, the geometric information of the blood vessel is obtained through image processing technology, including data such as the centerline, the name of the centerline, and the radius distributed along the centerline;

[0149] Step S402, select two centerlines, traverse from the exit position to calculate the distance d between the two centerline points, if d<0.5mm, then consider this position to be the bifurcation point of the two centerlines;

[0150] Step S403, repeating step S402, traversing all centerlines, and obtaining the positions of all bifurcation points;

[0151] Step S404, traversing each centerline, using the centerline between two bifurcation points as a section of blood vessel, so as to obta...

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Abstract

The invention provides a method and device for calculating vascular functional indexes, a computer storage medium and a processor. The method comprises the steps that a one-dimensional blood flow model of a target coronary blood vessel is obtained, and the one-dimensional blood flow model comprises unknown geometric information and unknown boundary conditions; unknown geometric information and unknown boundary conditions are solved, and a solved one-dimensional blood flow model is obtained; the solved one-dimensional blood flow model is adopted, and functional indexes of the target coronary blood vessels are obtained through calculation. The technical problems that in the prior art, a method for obtaining the blood flow characteristics through a three-dimensional flow equation is large in calculation amount and has high requirements for calculation resources are solved.

Description

technical field [0001] The present application relates to the field of hemodynamics, in particular, to a method, device, computer storage medium and processor for calculating vascular function indexes. Background technique [0002] Hemodynamics refers to the mechanics of blood flow in the cardiovascular system. It mainly studies blood flow, blood flow resistance, blood pressure and the relationship between them. In the prior art, methods for obtaining blood flow characteristics (such as pressure and flow velocity) in arterial vessels are mainly invasive measurement using a pressure guide wire and three-dimensional numerical simulation of blood flow based on computational fluid dynamics technology. The invasive measurement technology based on the pressure guide wire introduces the guide wire with the pressure sensor from the peripheral blood vessel and places the sensor at the position of the blood vessel to be measured, and directly measures the flow parameters at the corres...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T17/00
CPCG06T7/0012G06T17/00G06T2207/30104
Inventor 赵清华毛益进张超曾勇张安勇刘伟
Owner 深圳市阅影科技有限公司
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