The difference between 3D and 4D prenatal examination

Three-dimensional and four-dimensional prenatal examinations are different methods. The difference between them lies in the observed images. Both can show the development of the fetus. The resolution of four-dimensional is slightly higher than that of three-dimensional, so the image of the fetus will be clearer. As for the choice of these two methods, pregnant women can choose according to their actual situation. Let us now understand the differences between three-dimensional and four-dimensional prenatal examinations.

In fact, color ultrasound is not always in color. Color ultrasound is still in black and white. Only three-dimensional and four-dimensional color ultrasound may be khaki when producing three-dimensional and four-dimensional images. It is called color ultrasound because indicators such as the heart and blood flow are marked in colors. The resolution of color ultrasound is relatively higher than that of general black and white B-ultrasound, so more doctors are willing to use color ultrasound to perform more detailed examinations. And because the blood flow is marked with colors, when the umbilical cord is wrapped around the neck, you can see a U-shaped or W-shaped blood flow on the baby's neck, making it easy to tell whether the umbilical cord is wrapped around the neck.

Three-dimensional color ultrasound and four-dimensional color ultrasound do not mean that the observed images are three-dimensional or four-dimensional. Instead, they are generated later. They are still observed using ordinary color ultrasound, and then the observed plane images are converted into three-dimensional or four-dimensional stereoscopic images through the conversion software in the instrument. In fact, in terms of diagnosis, three-dimensional color ultrasound and four-dimensional color ultrasound are not any more advantageous for diagnosis. It’s just that people who don’t understand B-ultrasound images can also see something. The significance of three-dimensional and four-dimensional color ultrasound lies in the ability to observe dynamic motion images of intrauterine fetal growth and development in real time.

The difference between three-dimensional color ultrasound and four-dimensional color ultrasound lies in the difference in the time dimension parameters. That is to say, three-dimensional color ultrasound is a picture, and four-dimensional color ultrasound is a video, which allows pregnant women to see a series of movements of the fetus.

Four-dimensional color ultrasound is dynamic, while three-dimensional color ultrasound is static, so four-dimensional color ultrasound will look clearer. Three-dimensional color ultrasound can only be a photo taken at a certain point in time, while four-dimensional color ultrasound can turn a series of actions into multimedia. In terms of screening for fetal malformations, both three-dimensional color ultrasound and high-definition four-dimensional color ultrasound have the same function, but high-definition four-dimensional color ultrasound is more accurate.