1, color Doppler ultrasound generally uses autocorrelation technology to process Doppler signals, and the blood flow signals obtained by autocorrelation technology are encoded by color images and superimposed on two-dimensional images in real time, thus forming color Doppler ultrasound blood flow images. It can be seen that color Doppler ultrasound (that is, color Doppler ultrasound) not only has the advantages of two-dimensional ultrasonic structural images, but also provides rich hemodynamic information.
Its main advantages are:
① It can quickly and intuitively display the two-dimensional plane distribution of blood flow.
② It can display the running direction of blood flow.
③ It is helpful to distinguish arteries from veins.
④ It is helpful to distinguish vascular diseases from non-vascular diseases.
⑤ It helps to understand the essence of blood flow.
⑥ It is convenient to know the phase and velocity of blood flow.
⑦ Shunt and reflux can be found reliably.
⑧ The source, width, length and area of blood flow beam can be quantitatively analyzed.
2. The related technology of color Doppler ultrasound is pulse wave. When the speed of the detected object is too high, the color of color blood flow will be wrong, which is obviously not as good as spectral Doppler in quantitative analysis. Nowadays, all color Doppler ultrasound instruments have the function of spectrum Doppler, that is, color-dual-function ultrasound.
3.CDF, also known as CDI, obtains echo information from the same source as spectral Doppler, displays the distribution and direction of blood flow in two dimensions, and distinguishes different speeds with different colors. Dual-function Doppler ultrasound system, that is, B-mode ultrasound image shows the location of blood vessels. Doppler measurement of blood flow. This combination of B-mode and Doppler system can locate any specific blood vessel more accurately.
Second, it can be seen that the advantages of color ultrasound are roughly as follows:
1: High resolution and sensitivity.
The resolution of color Doppler ultrasound is higher than that of ordinary black-and-white ultrasound. Therefore, when more detailed examination is needed, more doctors are willing to use color Doppler ultrasound examination;
2. More functions
B-mode method, M-mode method and Doppler method can be used at any time as needed, which is beneficial to the detection of lesions and the judgment of benign and malignant tumors.
Compared with black-and-white B-ultrasound, color ultrasound can be observed in many directions and angles, and there are 3-dimensional or even 4-dimensional color ultrasound in the market.
4. Use bleeding dynamics
Color Doppler ultrasound is simply high-definition black-and-white B-ultrasound plus color Doppler, which not only has the advantages of two-dimensional ultrasonic structural images, but also provides rich hemodynamic information and can accurately reflect the blood flow characteristics of various organs in physiological and pathological conditions.
Third, the specific application
At present, there are many companies doing B-ultrasound and color ultrasound in China, and many manufacturers have produced digital products. Image standard color Doppler ultrasound, video acquisition cards used in digitization, such as Mephite M 1 103, M 130 1, etc.
At present, high-definition color Doppler ultrasound has appeared in the market, which has higher definition than conventional color Doppler ultrasound. Of course, the equipment is also expensive. In the process of digitalization of high-definition color Doppler ultrasound equipment, a professional high-definition medical video acquisition card is needed. If the device is an HDMI\DVI interface, select the M1202-2D/M1230-2D high-definition HDMI\DVI interface image acquisition card, and some devices are VGA interfaces.
The development of color Doppler ultrasound to high definition is an inevitable trend of medical development, just like medical X-ray machine (C-arm, etc. ) develop towards high definition.