What is the difference between large row deformity and four-dimensional color Doppler ultrasound?

Large deformation and four-dimensional ultrasound is actually the same thing, of course, there are some hospitals large deformation is the use of three-dimensional ultrasound, but whether it is three-dimensional ultrasound or four-dimensional ultrasound, their basic approach is the same, but the advanced degree of the machine is different. The so-called large deformation, as the name implies, is to eliminate large abnormalities, from the head to the limbs to the internal organs to the heart, kidneys, intestines, liver, genitals, spine These organs will be carefully examined. Of course, large displacement is generally carried out at twenty-four to twenty-six weeks, when the fetus is relatively not small, so it is difficult to see all the organs mentioned above at once, and some pregnant women need to cooperate with more activities and wait for the fetus to turn around before further inspection.