When pregnant women undergo prenatal examinations, they inevitably encounter System B-ultrasound and 4D ultrasound, but pregnant women find it difficult to understand what the differences between the two examination methods are. In the face of such options, how to choose? Do pregnant women need to do System B-ultrasound and 4D ultrasound? Below is a simple understanding and understanding of this issue, hoping that the following points will be helpful to everyone!

One, focus

1. System B-ultrasound focuses on internal organs

System B-ultrasound is the examination of the whole body of the fetus using a high-definition color Doppler blood imaging instrument. The content of the examination includes the fetus’s spine, head, face, heart, abdomen (stomach, liver, kidney, bladder), and body. The image produced is a cross-section, which is not understood by ordinary people, and the technical standards of the B-ultrasound doctor are high. The image produced can only be understood by them. The examination is more detailed, and the basic whole body structure needs to be examined, and the examination takes a long time.

2. 4D ultrasound focuses on the surface

4D ultrasound uses a new type of ultra-clear shooting instrument, the image is stereoscopic, clearer, and can observe the growth and development status of the fetus in the uterine cavity from all directions and multiple angles, providing accurate scientific evidence for early diagnosis of congenital external malformations and congenital heart disease. 4D ultrasound not only can measure the gestational age of the fetus, but also can conduct accurate checks on the physical growth status, heart function status, and whether there is cleft lip and palate of the fetus, which is something that general B-ultrasound cannot do.

Two, examination time

1. The best time range for pregnant women to do the reinstallation of System B-ultrasound is between 22-25 weeks of pregnancy. At this stage, the development of each organ tissue of the fetus tends to be complete, the size of the fetus and the amniotic fluid of the pregnant woman are moderate, and the ultrasound image is clear due to less bone echo. Therefore, it is very scientific to do the relative color Doppler ultrasound examination at this time.

2. The best time range for pregnant women to do 4D ultrasound is between 24-28 weeks of pregnancy. If it is earlier than 22 weeks, the baby’s body fat is still very little, and even the baby’s bones can be seen through 4D ultrasound, which is not conducive to accurately understanding whether the baby is growing healthily. If it is later than 28 weeks, the baby has already dropped into the pelvis, and it is impossible to observe the baby’s whole body at this time through 4D ultrasound.

4D ultrasound has the effect of real-time dynamics on the basis of three-dimensional ultrasound. Pregnant fathers and mothers can see the baby’s physiological activities such as exercise, breathing, swallowing, yawning, and sticking out the tongue in the mother’s belly through the screen, which is very vivid.

After seeing the differences between the two, pregnant mothers no longer need to worry. In fact, both can be done together. The B-ultrasound examination in System B mainly conducts screening for anomalies in key human internal organs such as the brain, thalamus, internal visceral organs, kidney function, and abdomen. The 4D ultrasound is for screening anomalies in the external human organs of the baby, such as the limbs and back. Together, they can achieve a more comprehensive and accurate screening of the baby’s physical defects, achieving the best actual effect.