3d 4d ultrasound

The recent advent of 3D/4D ultrasound answers this need 1 (the ‘4D’ refers to 3 spatial dimensions plus 1 time dimension). garwa 4d In the last two decades experiments with 3D/4D ultrasound were initially carried out by Chi-Fishman, Sonies, Ohazama, and Freidlin (2000) and Bressmann, Ackloo, Heng, and Irish (2007)