Device for directly measuring blood flow velocity

Abstract

The invention provides a device for directly measuring blood flow velocity, which comprises an ultrasonic diagnostic apparatus, wherein a main machine video output opening of the ultrasonic diagnostic apparatus is directly connected to a sampling system, an image processing unit and a blood flow velocity calculating unit; the sampling system selects a specific image block (2) and continuously samples a harmonic wave image, and the image processing unit processes the harmonic wave image according to a two-dimensional cross-correlation algorithm. The device is used for imaging a blood vessel inwhich a tracing agent (3) is stored, confirming the specific image block (2) in the formed image, then realizing the continuous tracking on the specific image block (2), extracting the corresponding track information and realizing the direct detection on the blood flow velocity by combining the recorded image frame number during the tracking. The scheme obtains a moving track irrelevant to indirect parameters by tracking the specific image block (2) between the frames, ensures the independence of detection on a principle and a method and achieves the aim of directly measuring the blood flow velocity.

Description

technical field [0001] The invention relates to a device for directly measuring blood flow velocity, which belongs to the technical field of medical equipment. Background technique [0002] Blood flow velocity belongs to the category of hemodynamics and is an important index to measure human health. In the past, there are many kinds of blood flow velocity measurement of large, medium and small arterial vessels, venous vessels and capillaries. Utilize the principle of ultrasonic Doppler, that is, use the ultrasonic probe of the ultrasonic Doppler instrument to detect the blood flow velocity; use the principle of electromagnetic flow to detect the blood flow at the installation site of the probe, and then calculate the blood flow velocity according to the cross-sectional area of ​​the blood vessel; The principle of blood temperature sensing, using a Swan-Ganz catheter equipped with a thermistor to detect blood flow velocity. In addition, there are nuclear magnetic resonance ...

AI Technical Summary

Problems solved by technology

This method is mainly used for the study of local cerebral blood flow and brain function, the operation process is quite complicated, and the medical expenses are high

The optical method is only suitable for light-transparent blood vessels, such as microcirculation, fundus blood vessels, etc.

The dilution method is a method of measuring blood flow velocity based on Fick's principle. This method can only measure the average blood flow within a period of time, and cannot reflect real-time dynamic changes in blood flow velocity.

[0004] The above-mentioned existing technologies have their own advantages and disadvantages, all of which are affected by various factors and cannot directly measure the blood flow velocity.

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