Coronary flow reserve calculation method based on myocardial blood flow and CT (Computed Tomography) image

A technology of coronary blood flow and coronary arteries, which is applied in blood flow measurement, image analysis, image data processing, etc., can solve the problems of limiting the clinical application of CTFFR and the inability to measure coronary flow velocity, so as to reduce the difficulty and risk of surgery, and improve operation efficiency. Simplicity and the effect of improving accuracy

Active Publication Date: 2020-06-05
SUZHOU RAINMED MEDICAL TECH CO LTD
View PDF19 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because CTA cannot measure the coronary flow velocity in the hyperemic state, it c...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coronary flow reserve calculation method based on myocardial blood flow and CT (Computed Tomography) image
  • Coronary flow reserve calculation method based on myocardial blood flow and CT (Computed Tomography) image
  • Coronary flow reserve calculation method based on myocardial blood flow and CT (Computed Tomography) image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] 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.

[0052] Given a cardiac CT image, extract the heart according to the reverse method, and process the descending aorta, spine, and ribs in the non-target area, and gradually remove non-cardiac tissues such as the chest wall, lungs, vertebrae, and descending aorta. Extract the image of the heart. On the obtained cardiac image, the ascending aorta and its centerline are extracted by utilizing the circular feature of the aort...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a coronary flow reserve calculation method based on myocardial blood flow and a CT (Computed Tomography) image. The method comprises the following steps of: extracting a myocardial image to determine a myocardial volume; positioning a coronary artery orifice, and carrying out accurate segmentation on the coronary artery; carrying out edge detection of coronary artery volumedata to generate a grid model required by calculation; through noninvasive measurement, determining a resting state myocardial blood flow and CFR (Coronary Flow Reserve); calculating a total flow ona coronary artery inlet under a maximum hyperaemia state; determining the flow of the maximum hyperaemia state in different blood vessels in a coronary artery tree so as to determine the flow rate V1of the maximum hyperaemia state; taking the V1 as the flow rate of the coronary artery inlet, calculating pressure drop [delta] P from the coronary artery inlet to the narrow far end of the coronary artery, and average pressure P<d>=P-[delta] P in the coronary artery of the narrow far end, and calculating the coronary flow reserve. On the basis of a heart CT image, FFR (Fractional Flow Reserve)can be quickly and accurately obtained in a full-automatic way.

Description

technical field [0001] The invention relates to the field of coronary imaging evaluation, in particular to a method for calculating coronary artery blood flow reserve fraction based on myocardial blood flow and CT images. Background technique [0002] Both coronary angiography and intravascular ultrasound are considered the "gold standard" for diagnosing coronary heart disease, but they can only perform imaging evaluation on the degree of lesion stenosis, but it is unknown how much the stenosis affects the distal blood flow; Fractional flow reserve (FFR) has now become a recognized index for functional evaluation of coronary artery stenosis, and its most important function is to accurately evaluate the functional consequences of an unknown coronary artery stenosis. [0003] Fractional flow reserve (FFR) refers to the ratio of the maximum blood flow that can be obtained by the myocardial region supplied by the target measurement vessel to the theoretical maximum blood flow th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A61B5/026A61B6/03
CPCA61B5/026A61B6/504A61B6/03G06T7/0012G06T2207/10081G06T2207/30048G06T2207/30104G06T7/11G06T7/155G06T7/187G16H50/50G16H50/30G16H30/40G06T11/008G06T2211/404A61B6/032A61B6/503A61B6/5235A61B6/5247A61B6/507A61B6/5217G06T2207/20156G06T2211/412
Inventor 霍云飞刘广志吴星云王之元
Owner SUZHOU RAINMED MEDICAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap