Color Doppler ultrasound generally uses autocorrelation technology for Doppler signal processing, and the blood flow signal obtained by autocorrelation technology is color coded and superimposed on the two-dimensional image in real time to form a color Doppler ultrasound blood flow image. It can be seen that color Doppler ultrasound (color Doppler ultrasound) not only has the advantages of two-dimensional ultrasound structure images, but also provides rich information on hemodynamics. The practical application has been widely valued and welcomed. It is known as "non-traumatic angiography" in clinical practice ".
The related technology used by color Doppler ultrasound is pulse wave. When the speed of the detection object is too high, the color of the color flow will be wrong, which is obviously inferior to spectral Doppler in quantitative analysis. Nowadays, color Doppler ultrasound has the function of spectral Doppler, that is, color-dual-function ultrasound.
Color Doppler ultrasound blood flow map (CDF) is also called color Doppler ultrasound imaging (CDI). The source of echo information obtained by it is consistent with spectral Doppler. The distribution and direction of blood flow are displayed in two dimensions. Different speeds are distinguished by different colors. Dual-power Doppler ultrasound system, that is, B- mode ultrasound images show the position of blood vessels. Doppler measures blood flow. The combination of type B and Doppler system can more accurately locate any specific blood vessel.