4D Ultrasound machines  are made with latest technologies provide the absolute best image quality for even difficult patients. Medical professionals, especially those in clinical environments who require the very best where price is not an obstacles will want to choose machines in this segment.

The companies which manufacture 4d machines are: GE,PHILIPS,SIEMENS,TOSHIBA  etc..

GE has been the leader in 3D / 4D ultrasound ever since it purchased the Voluson line of ultrasound machines from Medison. Samsung has since purchased Medison and continues to follow GE in second place in providing the best 4D image quality.
The Voluson E10 is the newest version of the Voluson line and slightly surpasses the excellent GE Voluson E8, the undisputed leader for nearly a decade. Both are at the top in terms of image quality, features and available transducers. The Samsung UGEO WS80 is an excellent improvement on the Accuvix A30 that was already a very good 3D/4D  Ultrasound machine. If you can’t afford GE 4D Ultrasound machines then Samsung 4D  Ultrasound machines offers a compelling second choice at a lower price point.
MAPMED IMAGING recommends the GE Voluson E10 if you must have the absolute cutting edge and don’t mind paying the highest cost for it. The GE Voluson E8 is recommended for those who want the absolute best, but also want to save money over the new E10. The Voluson E8 delivers the best price for performance in the premium category.as a late model refurbished or demo system. MAPMED IMAGING recommends the Samsung UGEO WS80 for those who want premium level performance at only a high-end price.