There is little difference between four-dimensional color Doppler ultrasound and ordinary color Doppler ultrasound. We just use our own computer to reconstruct the fetal face model, and then leave a souvenir for our parents. Everything else is useless. Diagnosing diseases is the same as ordinary color Doppler ultrasound. In fact, there is no need to do four-dimensional color Doppler ultrasound, which is of little significance.
If you really want to do it, you usually need to make an appointment, first go to the color ultrasound room to make an appointment, and then do it.