Color ultrasound and B ultrasound principle is not much difference, are similar, color ultrasound is mainly to see vascular, such as the heart and so on, color is the computer according to the direction of blood flow added.
Currently, the direction of development of ultrasound in the medical field is color ultrasound.
Color ultrasound features:
Color ultrasound is simply a high-definition black-and-white ultrasound plus color Doppler, first of all, ultrasound frequency shift diagnostic method, that is, D ultrasound, the method applies the principle of the Doppler effect, when the source of the sound and the receiver (i.e., the probe and the reflector) when there is a relative motion between the frequency of the echo has changed, such frequency change is called the frequency shift, D ultrasound including pulsed Doppler, continuous Doppler and color Doppler. Doppler includes pulsed Doppler, continuous Doppler, and color Doppler flow images.
Color Doppler ultrasound generally uses autocorrelation for Doppler signal processing, and the blood flow signals obtained by autocorrelation are color-coded and then superimposed on a two-dimensional image in real time to form a color Doppler ultrasound blood flow image. As a result, color Doppler ultrasound (i.e., color ultrasound) not only has the advantages of two-dimensional ultrasound structural images, but also provides a wealth of information on hemodynamics, and its practical application has been widely valued and welcomed, and it is known as "non-traumatic angiography" in clinical practice. Its main advantages are: ① It can quickly and intuitively display the two-dimensional distribution of blood flow. ②It can show the running direction of blood flow. ③It is good for identifying arteries and veins. ④It is good for recognizing vascular and non-vascular lesions. ⑤Facilitates the understanding of the nature of blood flow. ⑥ It can facilitate the understanding of the temporal phase and velocity of blood flow. ⑦ It can reliably detect shunts and refluxes. (8) It can quantitatively analyze the origin, width, length, and area of blood flow bundles.
But the color ultrasound using the relevant technology is a pulse wave, the speed of the detector is too high, the color of the color flow color error will occur, in the quantitative analysis is significantly inferior to the spectral Doppler, nowadays color Doppler ultrasound instrument have the function of the spectral Doppler, that is, for the color - dual-function ultrasound.
Color Doppler flow mapping (CDF), also known as color Doppler ultrasound imaging (CDI), which obtains the same source of echo information and spectral Doppler, the distribution and direction of blood flow is shown in two dimensions, and different speeds are distinguished by different colors. Dual-energy Doppler ultrasound systems, that is, B-mode ultrasound images show the location of blood vessels. Doppler measures blood flow, and this combination of B-mode and Doppler systems allows for more precise localization of any given vessel.