Fractional flow reserve measurement method and system based on intravascular ultrasound images

Abstract

The invention discloses a fractional flow reserve measurement method and system based on intravascular ultrasound images, and the method comprises the steps: obtaining a batch of intravascular ultrasound images, dividing the batch of intravascular ultrasound images into a training set and a verification set, and obtaining a training set image and a verification set image; optimizing a preset modelbased on the training set image and the verification set image to obtain a machine learning model; acquiring a to-be-detected intravascular ultrasound image and performing image feature extraction toobtain feature data; and inputting the feature data into the machine learning model to obtain the fractional flow reserve of the ultrasonic image in the blood vessel to be detected. The system comprises a division module, an optimization module, a feature module and an output module. The FFR value can be calculated according to the IVUS image, and the invention has characteristics of high accuracy and low calculation requirement. The fractional flow reserve measurement method and system based on the intravascular ultrasound image can be widely applied to the field of medical image processing.

Description

technical field [0001] The invention relates to the field of medical image processing, in particular to a method and system for measuring blood flow reserve fraction based on intravascular ultrasound images. Background technique [0002] Fractional flow reserve (FFR) is mainly the ratio of blood pressure downstream of coronary stenosis to upstream blood pressure of stenosis. The smaller the ratio, the more serious the impact of stenosis on blood flow. It is currently an effective clinical diagnosis method. Evaluation index is an important means of quantitative and fixed-point evaluation and diagnosis of coronary artery physiological status and function in medicine. At present, in addition to direct measurement, the existing technologies for obtaining FFR value mainly include two types, FFR calculation based on coronary angiography, The calculation of FFR based on OCT, these two methods have high requirements for calculation and cannot be well applied in clinical practice. ...

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Problems solved by technology

[0002] Fractional flow reserve (FFR) is mainly the ratio of blood pressure downstream of coronary stenosis to upstream blood pressure of stenosis. The smaller the ratio, the more serious the impact of stenosis on blood flow. It is currently an effective clinical diagnosis method. Evaluation index is an important means of quantitative and fixed-point evaluation and diagnosis of coronary artery physiological status and function in medicine. At present, in addition to direct measurement, the existing technologies for obtaining FFR value mainly include two types, FFR calculation based on coronary angiography, OCT-based FFR calculation, these two methods have high requirements for calculation and cannot be well applied in clinical practice

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