A 2D image is the familiar, one-dimensional, black-and-white picture used for diagnostic scans and gender reveals. 3D adds dimension, color and the ability to print off scans or save them to a CD. With this scan, you’re able to see more of what your baby looks like, from its tiny fingers to its cute, button nose. 4D imaging is the most cutting-edge of all ultrasound technology and involves seeing your baby’s movements and personality through 3D video captured on a keepsake DVD.