Ultrasonic Doppler blood-imitating fluid mould

Abstract

The invention relates to an ultrasonic Doppler blood-imitating fluid mould, which comprises a mould shell and a blood imitating device, wherein the bottom surface of a shell comprises a bottom surfaceplate comprising a first number of holes, and the holes are closed by a plugging device; the top surface of the shell includes an acoustic window; an inner cavity is formed in the shell, and the inner cavity is filled with an imitation tissue material; the blood imitating device comprises a first blood imitating vessel, a second blood imitating vessel, a blood flow imitating inlet, a blood flow imitating outlet and a blood imitating communicating pipe; the first blood imitating vessel and the second blood imitating vessel respectively pass through the inner cavity at an included angle with the acoustic window, a first end of the first blood imitating vessel is connected with the blood flow imitating inlet outside the shell, and the first end of the second blood imitating vessel is connected with the blood flow imitating outlet outside the shell; a second end of the first blood imitating vessel is communicated with the second end of the second blood imitating vessel outside the shell through the blood imitating communicating pipe; the central axes of the first blood imitating vessel and the second blood imitating vessel are parallel to each other; the portions of the first blood imitating vessel and the second blood imitating vessel located in the inner cavity are embedded in the imitation tissue material. Thus, the performance of the ultrasonic Doppler instrument can be effectively detected.

Description

technical field [0001] The invention relates to the field of quality detection of medical equipment, in particular to a blood imitation fluid model used for performance detection of ultrasonic Doppler instruments. Background technique [0002] The successful application of the Doppler principle in ultrasonic diagnostic technology is one of the major advances in the fields of medicine and instrument engineering in the 20th century. Ultrasonic Doppler frequency shift is a physical effect caused by the relative motion between the sound source and the receiver or echo target (reflector, scatterer). At present, the working modes of clinically used equipment are divided into three types: continuous wave Doppler (CWD), pulsed wave Doppler (PWD) and color Doppler flow imaging (CFM). The echo targets involved include red blood cells in blood, myocardial , blood vessel walls, and tissues adjacent to moving organs, and information display and provision methods include Doppler spectrum...

AI Technical Summary

Problems solved by technology

In addition, the simulated blood flow pipes in this phantom are concentrated near the middle depth, which cannot meet the requirements of measuring the blood flow detection depth in a wide range; its unique multi-tube structure requires frequent insertion and extraction during use, resulting in Imitation of blood spills, polluting equipment and the environment, and affecting the stability and reproducibility of measurement results

For another example, the internal diameter of the simulated blood vessel embedded in the Gammex-MRI product is 5mm, and the included angle with the acoustic window is 40°, resulting in a limited range of overall flow velocity

Another example is that the imitation tissue material of the blood imitation fluid model is filled in one time, and the liquid components contained in it will gradually evaporate and lose from the molecular gap and the acoustic window of the shell material, resulting in changes in performance parameters, resulting in loss of effectiveness

Another example is that there is no mark on the acoustic window of the blood imitation fluid model regarding the position of the simulated blood vessel. The operator needs to search in a large area on the acoustic window, which is time-consuming and affects the accuracy, reproducibility and reliability of the measurement results.

The detection depth is the primary technical index of color ultrasound and spectral Doppler instruments. The blood flow detection depth of color ultrasound is read with an electronic cursor on the two-dimensional grayscale image, but the spectral Doppler instrument has no two-dimensional grayscale imaging function and cannot be used Electronic cursor reads detection depth

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