When it comes to ultrasound, everyone is familiar with it. Are you also curious, why is the inspection image in black and white when it is a color ultrasound examination? Where did the "color" go? Today, we will reveal the "truths" in ultrasound.
Loading...
Color ultrasound, simply put, is high-definition black and white B-ultrasound plus color Doppler.
Han Bing, director of the second ultrasound examination department of Weihai Municipal Hospital, introduced that color ultrasound actually applies the principle of color Doppler ultrasound, through the color Doppler principle, it can mark organs and tissues with faster flow rate in the body, and the organs with faster flow rate in the body are actually red blood cells, so color ultrasound is marked with the image of red blood cells, and through some engineering coding, the flowing red blood cells are marked as red and blue according to the direction of blood flow, so that the color is presented on the image, not the color of the actual human tissue.
Color Doppler technology is the essential difference between color ultrasound and black and white ultrasound, simply put, color Doppler can see the flow of blood flow signals, and represent it in color, which involves physical quantities, which is the Doppler effect. Blood flow towards the probe is usually indicated in red, and blood flow away from the probe is indicated in blue.
With the image coding of color Doppler, it can show the lesions of the heart and blood vessels, which is the most important application, and can also do the identification of some diseases, such as lumps and nodules, if there is no blood flow may be solid, if there is no blood flow may be cystic, the essence is mainly fluid, and it tends to be benign lesions, and then the judgment of the nature of the tumor, theoretically speaking, the blood flow of malignant tumors may be richer, and the image shows that the blood flow of nodules is abundant, indicating that the possibility of malignancy is greater, if the blood flow is relatively sparse, The degree of malignancy may be a little lower.
Neck ultrasound is a non-invasive examination, which is simple, convenient and accurate. In particular, the examination of the arteriovenous blood vessels in the neck is of great help to determine the thickness of the arterial intima, atheromatosis, stenosis of blood vessels, and hemodynamics.
Carotid artery ultrasonography can predict and diagnose carotid plaque and arterial stenosis in advance. The vascular image is relatively dark, and the plaque image is relatively white, which will form an obvious color contrast, and it is easy to observe the image of the plaque, and the stable plaque and vulnerable plaque can be predicted through the image.
With the increase in health awareness, more and more people are paying attention to annual health check-ups. Ultrasonography is an important part of the health check-up and is essential to prepare for the ultrasound.
Ultrasound can now do many items, including the abdomen, obstetrics and gynecology, thyroid, breast and other small organs. Do abdominal examination, the common is the hepatobiliary, pancreas, spleen and kidney, requiring an empty stomach, more than eight hours is the best, the standard is not to eat or drink water, the first night after 10 o'clock do not eat, the next morning to check is a better condition. For gynecological examination or examination that requires the observation of the bladder, it is necessary to hold urine, the urine is black on the image, which forms a clear contrast with the surrounding organs, the uterus is located at the back of the bladder, and the uterus and ovaries will appear clearer if there is a contrast with the bladder in front.