Differences and choices between ordinary B-mode ultrasound, color ultrasound, three-dimensional color ultrasound and four-dimensional color ultrasound
Ordinary B-ultrasound is a kind of two-dimensional ultrasound, that is, the image detected by ultrasonic is black and white. Only can observe the fetal tissue structure. How big and how long is the measuring head?
Under what circumstances is ordinary B-mode ultrasound used? In the early stage of pregnancy, you can use ordinary B-ultrasound. In the early stage, it only detects the general condition of the fetus, such as whether it is in the uterus, the head circumference of the fetus, the length of the femur, amniotic fluid and other indicators.
Color Doppler is actually a black and white image. It is also a two-dimensional plane image. It is only on the basis of ordinary B-mode ultrasonography, color-Doppler ultrasonography detection and diagnosis technology has emerged, which can observe the blood flow of the fetus, and is conducive to timely detection of fetal abnormalities.
When do you choose color ultrasound? Usually used during the first trimester of pregnancy. Mainly to screen fetal organs for deformity (except for the face and lips).
Three-dimensional B-ultrasound, seeing the stereoscopic image, can accurately see the situation of the fetus up and down, left and right.
When do you choose 3D B? When the second large row of distortions, you need to use three-dimensional B-ultrasound to check for abnormal conditions.
The four-dimensional B-ultrasound is like a VCR photographed by camera. It can detect the congenital malformations such as cleft lip and palate, limb malformation, meningocele, spina bifida, and abdominal wall fissure.