Ultrasound is a kind of observation instrument that uses ultrasound to understand the structure of the body. The principle is very simple, is the emission of ultrasound, ultrasound is also a kind of sound, has the ability to penetrate, and like all the sound, encounter the barrier will produce echo, different barriers echo way is also different, so the use of computer to collect these echoes, transformed into the corresponding image on the screen display, to play a role in the observation of internal organs and so on. Is ultrasound harmful to the baby? Many mothers-to-be worry that having an ultrasound will be detrimental to the fetus in the womb, but ultrasound is usually done at least 3-5 times during pregnancy checkups. In fact, the use of ultrasound for regular medical examinations is absolutely harmless to the fetus. In theory, placing the ultrasound probe on the embryo for more than 15 minutes in early pregnancy may affect the development of the embryo, but the regular examination will not last that long, and after the first trimester of development, the ultrasound is harmless to the fetus, and it is even less likely to be harmful to the hearing, because the ultrasound emitted by the ultrasound is imperceptible to the human body. There is no such thing as “radiation”, how can sound have “radiation”? Only the computer on the ultrasound machine may have “radiation”, and now the home computer is no longer the enemy of pregnancy, not to mention the short exposure to the computer during the examination. What is a color ultrasound? 3-D ultrasound? 4-D ultrasound? Color ultrasound is not a “color ultrasound” in the literal sense, but is actually still black and white. The resolution of color ultrasound is higher than that of black and white ultrasound, so when more detailed examinations are needed, more doctors are willing to use color ultrasound to examine. And because the blood flow can be marked in color, when the umbilical cord is wrapped around the neck, you will see the blood flow in the shape of U or W on the baby’s neck, and you will know at a glance whether the cord is wrapped around the neck or not. The images of 3D ultrasound and 4D ultrasound are generated later, not that the images observed are 3D or 4D, but they are still observed by ordinary ultrasound, and then the flat images observed are converted into 3D or 4D stereoscopic images by the conversion software in the instrument. To put it more bluntly, if you install similar software in your home computer, you can convert the images of ordinary ultrasound into stereoscopic ones at home by yourself. In a diagnostic sense, 3D and 4D are not any more beneficial to diagnosis, except that people who don’t know ultrasound images can see what it looks like. The significance of the ultrasound is that you can see your baby in the womb in three dimensions. What is the difference between regular ultrasound, color ultrasound and 3D and 4D ultrasound? It can be understood that ordinary ultrasound is like a black and white photo, while color ultrasound is like a color photo, 3D ultrasound is like a three-dimensional color photo, and 4D ultrasound is like a VCR taken by a camera. Ordinary ultrasound and color ultrasound only see a flat surface, while 3D and 4D ultrasound see a three-dimensional image of the fetus. And the difference between 3-D and 4-D? Only in a “time dimension”. In layman’s terms, 3D is like a picture, and 4D is like a video. 3D is static, while 4D is dynamic, you can see a series of baby’s movements. In terms of technical age, B ultrasound and ordinary color ultrasound are relatively old, but they are also the most basic and commonly used ultrasound technology. However, 3D and 4D ultrasound are new ultrasound technologies that have been gradually developed in recent years, which have a lot to do with the precision of equipment and instruments. The four are the same in terms of medical principles, the essence of the use of ultrasound reflection imaging to ** inspection, the difference only lies in the imaging results show different, of course, the cost is also very different: ordinary ultrasound is the cheapest, color ultrasound is the next, three-dimensional and the next, four-dimensional most expensive.