Introduction to 4D color ultrasound Compared with other 3D ultrasound diagnostic procedures, 4D ultrasound allows doctors to observe the dynamic movement of the internal organs of the human body in real time. For example, doctors can judge the development of the fetus based on its movement, and improve the accuracy of ultrasound-guided puncture by observing the three-dimensional movement of the puncture needle. As a result, clinicians and sonographers can detect and detect everything from vascular malformations to genetic syndromes