Colorful blood flow imaging based on ultrasonic Doppler frequency spectrum and display method thereof

Abstract

The invention discloses a colorful blood flow imaging based on an ultrasonic Doppler frequency spectrum and a display method thereof. The display method comprises the following steps: (1) selecting a sampling door which is large enough; (2) dividing the sampling door into M sub-doors; (3) calculating the frequency spectrum of a time series summed in every sub-door; (4) calculating the upper and lower envelope curves of the frequency spectrum corresponding to every sub-door, determining an effective frequency band analysis area, and calculating the average blood flow speed and a mean square error in the effective frequency band analysis area; and (5) converting speed and variance yields into colorful codes and displaying by using a preset color mapping table. According to the display method provided by the invention, a plurality of doors are utilized to obtain the flow velocity and variance distribution at different positions along the cross section of a blood vessel, therefore, the distribution of the blood flow in a spatial position can be observed better, the volume and blood flow velocity can be measured more precisely, and the colorful blood flow imaging has an important clinical meaning on the diagnosis of cardiovascular diseases.

Description

technical field [0001] The invention relates to color blood flow imaging and a display method thereof, in particular to a color blood flow imaging based on ultrasound Doppler spectrum and a display method thereof. Background technique [0002] Color blood flow imaging is to color-code the distribution of blood flow velocity in the body for real-time display. In the application of medical ultrasound cardiovascular disease detection, by providing the direction, velocity and turbulence information of blood flow, the flow velocity and velocity of blood flow can be determined. Distribution, in order to achieve the purpose of assisting doctors in diagnosis. Traditional blood flow imaging generally uses the time-domain correlation method to complete the parameters that characterize the blood flow state, such as blood flow velocity, variance, and energy, and then provide them to the user through color coding. The disadvantage of the traditional method is that the blood flow informa...

AI Technical Summary

Problems solved by technology

[0010] However, the traditional spectral Doppler method also has defects: the spatial information of the flow velocity is equally important as the velocity distribution, and when the data in the sampling gate are summed, the spatial information of the blood flow will be lost, and the turbulence information in the blood flow will be lost. Often inferred from the spectral width or flow velocity spread in the Gate

However, due to the different distances from the vessel wall, the velocity profile of the laminar blood flow in the vessel is similar to a parabolic form, and the traditional Doppler display method is not easy to observe

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