Estimating system and method for fluid velocity

Abstract

The invention discloses an estimating system and method for fluid velocity. The estimating system comprises a positioning device, a transducer and a processor. The positioning device is used for determining position of to-be-detected fluid through ultrasonic imagining and selecting a plurality of signal sampling sites on a determined section of to-be-detected velocity. The transducer is used for, under the control of the processor, sending ultrasonic to the fluid and receiving pulse echo signals. The processor is used for processing the pulse echo signals, calculating the fluid velocities of the signal sampling sites and performing curve fitting to fluid velocity values of the signal sampling sites to acquire a section curve of the fluid velocity. With the processor, such as FPGA (field-programmable gate array), blood flow velocities with different depth in blood vessels are simultaneously sampled and measured so as to achieve the blood flow velocities. In this way, abnormal blood flow is timely reflected, and signal processing timeliness and calculation accuracy are higher, so that diagnostic basis is provided for diagnosis of vascular diseases.

Description

technical field [0001] The present application relates to medical ultrasound imaging technology, and in particular to a system and method for estimating fluid velocity. Background technique [0002] Medical ultrasound imaging technology is an imaging technology based on ultrasound. With the rapid development of medicine, materials, computers, electronic engineering and other technologies, the performance of medical ultrasound imaging equipment has been continuously improved, its functions have been continuously improved, and its uses have been continuously expanded. Ultrasound imaging diagnosis has the characteristics of high spatial resolution, real-time fast imaging, simple operation method, no contraindication, no damage, repeatable, portable and economical, and has been widely used in various medical applications. Together with CT and MRI, it constitutes an essential imaging diagnostic technique in clinical medicine. [0003] A large number of clinical studies have sho...

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Problems solved by technology

[0008] The mixer, sample-and-hold and filter used in the traditional analog demodulation process will introduce additional noise, and the demodulator is only for a specific transducer and a given frequency range, which has poor flexibility

The existing technology equipment can only measure the velocity of the fixed sampling volume in the blood vessel. The blood flow velocity in the middle of the blood vessel is used to replace the blood flow velocity in the blood vessel. The measured blood velocity is not accurate enough, and the blood flow in the blood vessel cannot be measured in real time. velocity profile

If the intravascular velocity profile is to be obtained, it is usually based on the flow velocity in the middle of the blood vessel through a time-domain correlation algorithm to make assumptions about the blood flow velocity profile. The parabolic shape is used for peripheral blood vessels, and the blunt shape is used for high-velocity vessels such as the aortic arch. The calculation of the velocity profile is not only complicated and computationally intensive, but also not a true reflection of the blood flow in the blood vessel

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