Ordinary B-ultrasound
B-ultrasound has gone through three stages of development. The earliest one used was black-and-white ultrasonic diagnostic technology, which is now the ordinary B-ultrasound. The image measured by the ultrasound probe is black and white, and only the tissue structure of the fetus can be observed, including how big the head is and how long the body is.
Color B-ultrasound
In the 1980s, color-Doppler ultrasonic detection and diagnosis technology appeared on the basis of ordinary B-ultrasound. The observed images are red and blue. Mainly, the one facing the probe is red, and the opposite is blue.
This technology can observe the blood flow of the fetus, which is helpful for timely detection of fetal abnormalities. For example, if there is a blood flow ring in the fetal neck, it means that the umbilical cord is wrapped around the neck, which can lead to suffocation and death. .
Three-dimensional B-ultrasound
Ordinary B-ultrasound and color B-ultrasound are both two-dimensional plane images. Currently, these two technologies are still in use, but the observation effect depends more on the amount of amniotic fluid and fetus. Position, once the amniotic fluid decreases in late pregnancy or the fetus faces the mother's back, the observation effect is not ideal. Moreover, two-dimensional images cannot satisfy expectant mothers’ desire to “see” what their babies look like. Therefore, in recent years, with the development of computer technology, three-dimensional B-ultrasound has appeared, which combines two-dimensional images into a model, and the fetus can be observed from all directions through the screen.
Four-dimensional B-ultrasound
Referred to as 4D ultrasound, it is currently the most advanced color ultrasound equipment in the world. The fourth dimension refers to the vector time. For ultrasound, 4D ultrasound technology is a newly developed technology. 4D ultrasound technology uses 3D ultrasound images plus time dimension parameters. The technology enables real-time acquisition of three-dimensional images, transcending the limitations of traditional ultrasound. It provides a wide range of applications including abdominal, vascular, small organ, obstetrics, gynecology, urology, neonatal and pediatrics.
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