What is the difference between 4D color Doppler and 3D color Doppler?

The biggest difference between four-dimensional color Doppler ultrasound and three-dimensional color Doppler ultrasound is that three-dimensional color Doppler ultrasound uses a special processing software to make an ordinary two-dimensional image into a three-dimensional image, while four-dimensional color Doppler ultrasound makes a two-dimensional image into a dynamic three-dimensional image, that is to say, four-dimensional color Doppler ultrasound is a three-dimensional image with a Timeline added, which is a moving three-dimensional image. Three-dimensional color Doppler ultrasound is not. Four-dimensional color Doppler ultrasound and three-dimensional color Doppler ultrasound the second difference is the price of three-dimensional color Doppler ultrasound will be slightly cheaper, four-dimensional color Doppler ultrasound is relatively expensive. But whether four-dimensional or three-dimensional good, they are not the best way to row abnormal. Under normal circumstances, large row abnormal use of two-dimensional B ultrasound can be, two-dimensional B ultrasound relatively small radiation, trauma to the baby is also small, but the technical requirements of doctors are very high, should go to qualified hospitals to check.