Common ultrasound examinations include ordinary B ultrasound, color ultrasound, three-dimensional ultrasound, four-dimensional ultrasound. For pregnant women, which ultrasound is clearer?
Ordinary B ultrasound is also known as "black and white" ultrasound, which is called two-dimensional ultrasound in medicine. The image shows the two-dimensional section of various organs or tissues, and the image resolution is poor.
The so-called color ultrasound is called color Doppler ultrasound in medicine. It can not only display the sectional images of various organs or tissues, but also observe the blood flow in the blood vessels using the principle of Doppler, such as measuring the blood flow velocity in the umbilical cord, observing whether the umbilical cord is around the neck, and understanding the distribution of fetal intracranial blood vessels, heart blood circulation, etc.
Three dimensional ultrasound includes the functions of two-dimensional ultrasound and color Doppler ultrasound, and can reconstruct images of some organs or tissue structures through ultrasound instruments to form three-dimensional images, which is easier to find fetal malformations. Moreover, three-dimensional ultrasound has high requirements for instruments and image resolution and clarity, which is more conducive for doctors to find hidden abnormalities in the fetus. Therefore, three-dimensional ultrasound is generally recommended for systematic screening of fetal malformations.
Four dimensional ultrasound, based on three-dimensional ultrasound, can conduct real-time dynamic observation of the fetus. Generally speaking, three-dimensional ultrasound is to take pictures of the fetus, and four-dimensional ultrasound is to take videos of the fetus. Generally, instruments that can perform three-dimensional ultrasonic inspection have four-dimensional ultrasonic function. When screening the fetus for malformation system, three-dimensional ultrasound is generally enough. If it is necessary to conduct dynamic observation on the fetus, such as three-dimensional facial imaging of the fetus, and the fetal position is not good enough to affect the observation, four-dimensional ultrasound can be used.
