Method using three-dimensional mechanics and tissue specific imaging of blood vessels and plaques for detection

Abstract

The invention relates to a method using three-dimensional mechanics characteristics and tissue specific imaging of blood vessels and plaques for detection. The method is on the basis of a multi-beam focus wave and superfast plane wave alternative transmitting sequence and can also be extended to a line-by-line scan imaging manner; the forms and the functions of the blood vessels and the plaques are evaluated and imaged respectively from the aspects of the radial-direction, circumferential and axial-direction three-dimensional mechanics characteristics, blood vessel wall shear rate, plaque form and tissue characterization, and the like; the new method which is provided for detection of the vulnerable plaques of a carotid artery is regarded as the improvement of the existing method.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging, in particular to a method for imaging and detecting three-dimensional mechanical and tissue characteristics of carotid arteries and plaques based on alternating emission sequences of multi-beam focused waves and ultrafast plane waves. Background technique [0002] Atherosclerosis is a systemic systemic disease, and regular ultrasound examination of carotid arteries has become the basic method for clinical atherosclerotic plaque screening. Existing diagnostic techniques for clinical vascular plaques mainly rely on imaging methods such as B-ultrasound images, pulse Doppler, and color Doppler to determine the location, size, and stenosis of plaques. Although the degree of stenosis is often used as an important routine measurement parameter in the diagnosis and treatment of atherosclerosis, many studies have shown that the occurrence of most acute cerebrovascular events is not directly rel...

AI Technical Summary

Problems solved by technology

However, the traditional B-ultrasound imaging mode is realized by sequentially focusing on transmitting and receiving scan lines one by one. The imaging frame rate of this imaging mode is only tens of hertz, while the pulse wave velocity of the human body can reach several meters per second. Therefore, the frame rate of traditional ultrasound imaging Rate Difficult to Capture Pulse Wave Propagation

In addition, there is a certain angle between the pulse Doppler emission beam and the blood flow in the traditional B-ultrasound, and only the flow velocity distribution map at different depths along the sound beam profile in the vessel cavity can be obtained, which reduces the shearing of the vessel wall. The estimated accuracy of the rate

At the same time, when the conventional pulse Doppler technology measures the flow velocity, there is a spectrum broadening effect, which is affected by factors such as the geometric characteristics of the sound beam and the flow velocity gradient in the sampling unit, which causes the spectrum to be blurred and the measured blood flow velocity is inaccurate

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