A device and method for measuring the lateral velocity of blood flow
A technology of transverse velocity and blood flow, which is applied in the field of ultrasound, can solve the problems of interfering with radial velocity measurement and affecting measurement accuracy, and achieve the effect of improving measurement accuracy, improving indication performance, and measuring blood flow velocity simply
Inactive Publication Date: 2018-10-09
WUHAN UNIV
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the traditional radial blood flow velocity measurement ultrasonic probe must be tilted, which affects the measurement accuracy, and the pulsation of the blood vessel contributes to the Doppler spectrum and interferes with the radial velocity measurement.
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Embodiment 1
[0029] Such as Figure 5 As shown, the technical solution of this embodiment is as follows: a device for measuring the lateral velocity of blood flow, including a control unit 5, the control unit 5 is connected with an ultrasonic transmitting unit 1 and a signal processing unit 3, and the ultrasonic receiving unit 2 and the described The signal processing unit 3 and the speed display unit 4 are connected in sequence.
[0030] The ultrasonic emission unit 1 comprises a high-frequency oscillation circuit, a power amplifier circuit and an ultrasonic emission probe; the control unit 5 controls the output of the high-frequency oscillation circuit by a switch; the output of the high-frequency oscillation circuit is connected to the The input end of the power amplifying circuit is connected, and the output end of the power amplifying circuit is connected with the input end of the ultrasonic transmitting probe.
[0031] Described ultrasonic receiving unit 2 comprises two receiving ci...
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The invention discloses a device and a method for measuring transverse velocity of blood streams. The device comprises a control unit, wherein the control unit is connected with an ultrasonic wave transmitting unit and a signal processing unit; an ultrasonic wave receiving unit is sequentially connected with the signal processing unit and a speed display unit. Ultrasonic probes are arranged on the surface of the skin of a human body, ultrasonic wave signals are transmitted through the ultrasonic wave transmitting unit of the measurement device and are reflected after reaching blood, and reflection signals are formed; two receiving circuits in the ultrasonic receiving unit receive the reflection signals respectively, and two paths of receiving signals are obtained; base-band interference signals are obtained after the two paths of receiving signals are processed by the signal processing unit, and the signal processing unit extracts the transverse velocity of a moving object according to the frequency characteristic of the base-band interference signals. By comparison with a conventional Doppler radial speed measurement method, the measurement precision of the transverse velocity measurement method is greatly improved, and more elaborate disease detection about human blood stream tissue is realized.
Description
technical field [0001] The invention belongs to the field of ultrasonic technology, and in particular relates to a device and method for measuring the lateral velocity of blood flow. Background technique [0002] Existing methods for measuring blood flow velocity mainly include ultrasonic Doppler imaging principles and techniques. The ultrasonic Doppler effect is that in a continuous medium, when the wave source moves relative to the receiver (such as the receiving instrument), the frequency of the fluctuation received by the receiver changes, which is different from the frequency emitted by the wave source. The frequency difference between the two The value, that is, the so-called frequency shift, is related to the speed of relative motion between the wave source and the receiver. Ultrasonic Doppler technology studies the frequency shift between the received ultrasonic wave and the ultrasonic wave emitted at a certain angle, and obtains the blood flow velocity according to...
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IPC IPC(8): A61B8/06
CPCA61B8/06A61B8/4411A61B8/5207
Inventor 龚志浩谷雨李文宇许梦妮赵亮詹明杰陈章友
Owner WUHAN UNIV