3D scans show still pictures of your baby in three dimensions. 4D baby scans show moving 3D images of your baby, with time being the fourth dimension. 3D and 4D ultrasound treatment may nonetheless provide more information about a known abnormality. Because these scans can show more detail from different angles, they can help in the diagnosis of cleft lip. This can help doctors to plan the repair after birth. 3D scanning can also be useful to look at the heart and other internal organs. As a result, some fetal medicine units do use 3D scans, but only when they're medically necessary. The best time to have a 3D or 4D scan is when you're between 26 weeks and 30 weeks pregnant. The 3D ultrasound cost is very high and maybe be advised to be replaced by 2D ultrasound scans. The radiologist may ask you to go for a walk, or to come back in a week, when your baby may have moved to a better position.If the placenta is at the front of your womb (uterus), known as anterior placenta, you'll get the best images of your baby if you wait until 28 weeks. 3D/4D Ultrasound Treatmentcan also be useful to look at the heart and other internal organs. As a result, some fetal medicine units do use 3D scans, but only when they're medically necessary. The multiplanar format allows the operator to evaluate several 2D planes at the same time. Using a reference dot on the screen which represents the point of intersection of three orthogonal planes (X, Y and Z), it can be freely moved to obtain an image at any plane within the scanned volume.